207 calculators
Education Calculators
Use these education calculators for statistics, formulas, grades, geometry, and percentage problems. Each tool shows the formula, the steps, and related guides where available.
Popular Education calculators
Education
Percentage Calculator – 3 Ways to Calculate %
Use this percent calculator to find the percentage of a number, percentage change, and other percent calculations with step-by-step math.
Education
GPA Calculator
Calculate weighted or unweighted GPA from letter grades and credit hours. Toggle between college and high school modes to estimate cumulative grades, GPA on a 4.0 scale, and class-grade averages with weighted bumps.
Education
Scientific Calculator
Free online scientific calculator with sin, cos, tan, asin, acos, atan, log, ln, square root, exponents, factorial, π, e, and parentheses. Toggle degrees and radians for trig functions. Works as a scientific calculator, online scientific calculator, math calculator, advanced calculator, trig calculator, logarithm calculator, exponent calculator, and square root calculator. A practical scientific calculator online for everyday math, algebra, and trigonometry problems, including any calculator with sin cos tan support.
Education
AP Score Calculator
Estimate your AP score from 1 to 5 using multiple choice and free response performance. Works as an AP score calculator and AP calculator for advanced placement exams. Useful as an APUSH calculator, APUSH score calculator, AP Stats calculator, AP World calculator, AP Gov calculator, AP Lit calculator, AP Lang calculator, AP Chem calculator, AP Bio calculator, AP Physics calculator, and AP Calc calculator.
Education
SAT Score Calculator
Free Digital SAT score calculator for 2026. Convert your raw Reading & Writing and Math scores into your scaled SAT score (400-1600) with percentile estimates. Supports adaptive Module 2 routing.
Education
Standard Deviation Calculator – Variance & SD
Use this sd calculator to compute sample and population standard deviation, variance, mean, and count from a list of numbers.
Education
Pythagorean Theorem Calculator
Find the hypotenuse or missing leg of any right triangle. Shows step-by-step solution with diagram.
Grades & GPA
10 calculatorsEducation
GPA Middle School Calculator
Calculate your middle school grade point average (GPA) using letter grades (A, B, C, D, F) with unweighted scoring.
Education
Final Grade Calculator – What You Need to Pass
Calculate what score you need on your final exam to pass the class or get an A using this free final calculator. Enter your current grade and target grade.
Education
Grade Calculator
Calculate your current class grade by entering your assignment scores. Supports both simple averages and weighted grading systems.
Education
Weighted Grade Calculator
Combine assignments, quizzes, and exams by weight to get a precise weighted course average.
Education
College GPA Calculator – Semester & Cumulative
Calculate your semester GPA and updated cumulative GPA on the standard 4.0 scale using this college GPA calculator. Supports Pass/Fail and withdrawn courses.
Education
GPA Calculator
Calculate weighted or unweighted GPA from letter grades and credit hours. Toggle between college and high school modes to estimate cumulative grades, GPA on a 4.0 scale, and class-grade averages with weighted bumps.
Education
High School GPA Calculator
Compute weighted and unweighted high school GPA from letter grades, with optional honors and AP or IB bonuses.
Education
Semester Grade Calculator
Calculate the overall semester grade for a class from assignments, quizzes, projects, and the final exam in points or weighted mode.
Education
Grade Average Calculator
Average a list of grades with a simple mean or a weighted average, and see the matching letter grade.
Education
Cumulative GPA Calculator
Calculate your overall cumulative GPA from multiple semesters using weighted credit hours. You can also plan the semester GPA required next term to hit a target cumulative GPA.
AP Score Calculators
13 calculatorsEducation
AP Score Calculator
Estimate your AP score from 1 to 5 using multiple choice and free response performance. Works as an AP score calculator and AP calculator for advanced placement exams. Useful as an APUSH calculator, APUSH score calculator, AP Stats calculator, AP World calculator, AP Gov calculator, AP Lit calculator, AP Lang calculator, AP Chem calculator, AP Bio calculator, AP Physics calculator, and AP Calc calculator.
Education
AP Lang Score Calculator
Free AP Lang score calculator for the 2026 AP English Language and Composition exam. Enter your multiple choice score and 3 essay rubric scores (Synthesis, Rhetorical Analysis, Argument) to predict your 1-5 AP score.
Education
AP Bio Score Calculator
Free AP Bio score calculator for the 2026 AP Biology exam. Enter your multiple choice (60 Qs) and free response scores (2 Long FRQs + 4 Short FRQs) to predict your 1-5 AP score.
Education
AP Chem Score Calculator
Free AP Chem score calculator for the 2026 AP Chemistry exam. Enter your multiple choice (60 Qs) and free response scores (3 Long FRQs + 4 Short FRQs) to predict your 1-5 AP score.
Education
AP Calc AB Score Calculator
Free AP Calc AB score calculator for the 2026 AP Calculus AB exam. Enter your multiple choice (45 Qs) and free response scores (6 FRQs, 54 total points) to predict your 1-5 AP score.
Education
AP Calc BC Score Calculator
Free AP Calc BC score calculator for the 2026 AP Calculus BC exam. Enter your multiple choice (45 Qs) and free response scores (6 FRQs, 54 total points) to predict your 1-5 AP score.
Education
AP Physics 1 Score Calculator
Free AP Physics 1 score calculator for the 2026 AP Physics 1 exam. Enter your multiple choice (40 Qs) and free response scores (4 FRQs, 40 total points) to predict your 1-5 AP score.
Education
AP Physics 2 Score Calculator
Free AP Physics 2 score calculator for the 2026 AP Physics 2 exam. Enter your multiple choice (40 Qs) and free response scores (4 FRQs, 40 total points) to predict your 1-5 AP score.
Education
AP Lit Score Calculator
Free AP Lit score calculator for the 2026 AP English Literature exam. Enter your multiple choice (55 Qs) and three essay scores (0-6 each) to predict your 1-5 AP score.
Education
AP World Score Calculator
Free AP World History score calculator for the 2026 AP World History: Modern exam. Enter your multiple choice (55 Qs), SAQ, DBQ, and LEQ scores to predict your 1-5 AP score.
Education
AP Gov Score Calculator
Free AP Gov score calculator for the 2026 AP US Government and Politics exam. Enter your multiple choice (55 Qs) and four FRQ scores (Concept Application, Quantitative Analysis, SCOTUS Comparison, Argument Essay) to predict your 1-5 AP score.
Education
AP Stats Score Calculator
Free AP Stats score calculator for the 2026 AP Statistics exam. Enter your multiple choice (40 Qs), short answer FRQs, and Investigative Task scores to predict your 1-5 AP score.
Education
AP Precalc Score Calculator
Free AP Precalc score calculator for the 2026 AP Precalculus exam. Enter your multiple choice (40 Qs) and four FRQ scores (calculator and no-calculator) to predict your 1-5 AP score.
Standardized Tests
15 calculatorsEducation
LSAT Score Calculator
Estimate your scaled LSAT score (120–180) and percentile rank from your raw correct answer count.
Education
Scale Factor Calculator
Find the scale factor between two dimensions, or enter an original length and scale factor to compute the new dimension.
Education
Mixed Fraction Calculator
Add, subtract, multiply, and divide mixed numbers or improper fractions with step-by-step solutions.
Education
Factorial Calculator
Calculate n! for any non-negative integer up to 170 with full step-by-step expansion, supporting big numbers via BigInt.
Education
Fraction Calculator
Add fractions, subtract, multiply, divide, and simplify fractions. Convert fraction to decimal and convert improper fractions to mixed numbers with step by step work.
Education
APUSH Score Calculator
Free APUSH score calculator for the 2026 AP US History exam. Predict your 1-5 score with section-specific weighting.
Education
SAT Score Calculator
Free Digital SAT score calculator for 2026. Convert your raw Reading & Writing and Math scores into your scaled SAT score (400-1600) with percentile estimates. Supports adaptive Module 2 routing.
Education
ACT Score Calculator
Free ACT score calculator for 2026. Convert your raw English, Math, Reading, and optional Science scores into your scaled 1-36 ACT score with composite and percentile estimates.
Education
PSAT Score Calculator
Free PSAT score calculator for 2026. Convert raw scores to scaled PSAT score (320-1520) and calculate your National Merit Selection Index (48-228).
Education
Factor Calculator
Find every factor of a whole number, list factor pairs, compute the prime factorization, and find the greatest common factor of two numbers. Works as a factor calculator, factors calculator, factor pairs calculator, prime factorization calculator, prime factors calculator, greatest common factor calculator, gcf calculator, and divisible numbers calculator. Useful for factors of a number problems and any factor question in math class.
Education
Decimal to Fraction Calculator
Convert a terminating decimal to a simplified fraction. Returns the unsimplified form, simplified fraction, mixed number, and percent.
Education
Fraction to Decimal Calculator
Convert any fraction to a decimal and percent. Returns the simplified fraction, decimal value, percent, and mixed-number form when applicable.
Education
Factoring Calculator
Factor quadratic expressions ax² + bx + c, extract the greatest common factor from a polynomial, and recognize the difference of two squares. Shows the factored form and the step that led to it.
Education
Limiting Reactant Calculator
Compare two reactants against the balanced coefficients of a chemical equation. Returns the limiting reactant, the excess reactant, the theoretical product amount, and the leftover excess.
Education
Partial Fraction Decomposition Calculator
Decompose (ax + b) / ((x − r₁)(x − r₂)) into A / (x − r₁) + B / (x − r₂) for distinct linear factors. Returns A, B, and the decomposed form with step notes.
Algebra & Pre-Calc
22 calculatorsEducation
Determinant Calculator
Calculate the determinant of a 2x2 or 3x3 matrix instantly with step-by-step minor expansions.
Education
Linear Interpolation Calculator
Estimate intermediate values between two coordinate points using the linear interpolation formula.
Education
Inverse Function Calculator
Find the algebraic inverse function f⁻¹(x) of linear, rational, power, and root expressions step-by-step.
Education
Domain Calculator
Find the allowable domain inputs and vertical asymptotes of common algebraic, rational, and radical functions.
Education
Taylor Polynomial Calculator
Calculate the nth-degree Taylor polynomial (or Maclaurin series) of any differentiable function about a center point with step-by-step derivatives.
Education
Interpolation Calculator
Estimate y values between known data points using the standard linear interpolation formula.
Education
Quadratic Formula Calculator
Solve any quadratic equation ax² + bx + c = 0. Compute the discriminant and find real or complex roots with a step-by-step breakdown.
Education
Slope Calculator
Find the slope of the line through two points using m = (y₂ − y₁) / (x₂ − x₁). Handles positive, negative, zero, and undefined (vertical) slopes.
Education
System of Equations Calculator
Solve a system of two or three linear equations using elimination or Cramer's rule. Detects unique solutions, no-solution systems, and infinite-solution systems with a plain-English reading.
Education
Balancing Equations Calculator
Balance a chemical equation by finding the smallest set of integer coefficients that conserves every element. Includes a per-element atom-count check on both sides.
Education
Inequality Calculator
Solve a one-variable linear inequality of the form ax + b ◊ cx + d for <, ≤, >, or ≥. Returns the solution interval, a number-line description, and the flip step when dividing by a negative.
Education
Synthetic Division Calculator
Divide a polynomial by x - c using synthetic division. Enter the polynomial coefficients and the divisor value c; the calculator returns the quotient coefficients, the remainder, and the full synthetic table step by step.
Education
Polynomial Long Division Calculator
Divide one polynomial by another using polynomial long division. Enter coefficients for the dividend and divisor; the calculator returns the quotient, the remainder, and a step-by-step trace.
Education
Matrix Calculator
Run matrix operations on 2x2 and 3x3 matrices: addition, subtraction, scalar multiplication, matrix multiplication, transpose, determinant, and inverse. Not a system solver (see RREF and system of equations).
Education
Matrix Multiplication Calculator
Multiply two matrices step by step. Enter the values for matrix A and matrix B to see the product, the dimensions, and how each entry is computed from the row-by-column dot products.
Education
Eigenvalue Calculator
Find the eigenvalues of a 2x2 matrix using trace and determinant. Returns the characteristic polynomial, discriminant, and real or complex eigenvalues from λ² − tr(A)·λ + det(A) = 0.
Education
Slope Intercept Form Calculator
Build the slope-intercept equation y = mx + b from two points, a slope and one point, or a standard-form equation Ax + By = C. Returns the slope, y-intercept, and step notes.
Education
Point Slope Form Calculator
Build the point-slope equation y − y₁ = m(x − x₁) from a slope and a point, or from two points. Also converts to slope-intercept form as a secondary output.
Education
Compound Inequality Calculator
Solve compound linear inequalities of the form a ◊ mx + b ◊ c (AND) or mx + b ◊ c OR px + q ◊ r. Returns the solution interval with intersection-or-union reading.
Education
Polynomial Calculator
Perform polynomial long division, find quotient and remainder, and work with polynomial expressions step by step.
Education
Absolute Value Calculator
Find the absolute value of any number or expression with step-by-step solution.
Education
Net Ionic Equation Calculator
Convert standard molecular chemical equations into total ionic and net ionic equations. Enter reactants and products, select phases, and watch spectator ions cancel out.
Calculus
21 calculatorsEducation
Euler's Method Calculator
Solve differential equations dy/dx = f(x, y) numerically and generate a step-by-step calculations table.
Education
Triple Integral Calculator
Solve ∫∫∫ f(x,y,z) dx dy dz over rectangular regions with numerical approximations.
Education
Geometric Series Calculator
Calculate the nth term, partial sum, and infinite sum of a geometric series from the first term and common ratio.
Education
Integral Calculator
Compute definite integrals of polynomials with the power rule, or numerically with Simpson's rule for safe expressions.
Education
Derivative Calculator
Differentiate polynomials term by term with the power rule — clear breakdown of each term's derivative.
Education
Limit Calculator
Evaluate limits of polynomial and rational expressions in x by direct substitution, with removable-discontinuity handling for simple quadratics and a numeric left/right check.
Education
Series Calculator
Find the nth term and the sum of the first n terms of an arithmetic or geometric sequence. Returns the closed-form formula used and a preview of the first several terms.
Education
Arc Length Calculator
Calculate arc length, central angle, or radius for a circular sector using s = r·θ. Supports degrees and radians, and includes an optional sector area output.
Education
Limits at Infinity Calculator
Find limits of rational functions as x approaches positive or negative infinity using the leading-term comparison. Returns the limit and a clear degree-comparison reading.
Education
L'Hôpital Calculator
Apply L'Hôpital's rule to a polynomial-over-polynomial limit at x = a that gives 0/0 by direct substitution. Differentiates numerator and denominator, then evaluates the new ratio.
Education
Infinite Series Calculator
Test an infinite geometric series for convergence and find the sum when |r| < 1 using S = a / (1 − r). Returns the sum, the convergence verdict, and a preview of the first few terms.
Education
Partial Derivative Calculator
Calculate the partial derivative of any multi-variable function with respect to a chosen variable with optional point evaluation.
Education
Double Integral Calculator
Calculate the definite double integral of a function of two variables over rectangular regions using numerical integration.
Education
Rate of Change Calculator
Compute either the average rate of change of a function over an interval or the instantaneous rate of change at a specific point.
Education
Taylor Series Calculator
Approximate any differentiable function f(x) with a Taylor polynomial centered at a specified point a with successive derivatives.
Education
Maclaurin Series Calculator
Calculate the Maclaurin series expansion of any differentiable function f(x) centered at zero with worked step-by-step derivatives.
Education
Laplace Transform Calculator
Find the Laplace transform of common functions of time using a standard lookup table of transform pairs.
Education
Radius of Convergence Calculator
Calculate the radius of convergence R of any power series using the Ratio Test with numerical limit approximations.
Education
Interval of Convergence Calculator
Find the interval of convergence of a power series including endpoint convergence testing using partial sum heuristics.
Education
Convergence Calculator
Test any infinite series for convergence or divergence using the Ratio Test, Root Test, and partial sum stabilization heuristics.
Education
Area Between Two Curves Calculator
Compute the area enclosed between two functions f(x) and g(x) over a given interval using definite integration.
Geometry & Trigonometry
19 calculatorsEducation
Cone Calculator
Solve for a cone's height, slant height, base area, lateral area, total surface area, and volume from any two inputs.
Education
Cross Product Calculator
Calculate the cross product A × B of two 3D vectors, with step-by-step determinant method.
Education
Pythagorean Theorem Calculator
Find the hypotenuse or missing leg of any right triangle. Shows step-by-step solution with diagram.
Education
Rectangle Calculator
Calculate the area, perimeter, diagonal, and aspect ratio of a rectangle from its length and width.
Education
Circle Calculator – Area & Circumference
Calculate the area of a circle, circumference, diameter, or radius given any single known value. Step-by-step equations and conversions included.
Education
Triangle Area Calculator
Calculate the area of any triangle from base and height, three sides (Heron's formula), or two sides and the included angle (SAS).
Education
Trapezoid Calculator
Calculate the area and perimeter of a trapezoid from the two parallel bases, the height, and the two non-parallel sides.
Education
Parallelogram Calculator
Calculate the area, perimeter, and interior angle of a parallelogram from base, height, and slant side.
Education
Regular Polygon Calculator
Calculate the perimeter, area, apothem, and interior and exterior angles of a regular polygon from the number of sides and side length.
Education
Right Triangle Calculator
Solve a right triangle from any of two legs, leg + hypotenuse, leg + acute angle, or hypotenuse + acute angle. Returns all sides, both acute angles, area, and perimeter.
Education
Perimeter Calculator
Calculate the perimeter (or circumference) of common 2D shapes: rectangle, triangle, circle, trapezoid, parallelogram, and regular polygon.
Education
Unit Circle Calculator
Enter an angle in degrees or radians and the calculator returns the reference angle, quadrant, sin, cos, tan, and the unit-circle coordinate (x, y). Exact values for common angles, decimal otherwise.
Education
Vector Calculator
Run vector operations in 2D and 3D: magnitude, unit vector, dot product, cross product (3D), angle between, addition, subtraction, and scalar multiplication.
Education
Centroid Calculator
Find the centroid of a triangle from three vertices, or the centroid of a list of 2D points. Returns the centroid coordinate (x-bar, y-bar) with step notes.
Education
Eigenvector Calculator
Find eigenvalues and unit eigenvectors of a 2×2 matrix. Returns trace, determinant, discriminant, both eigenvalues, and the corresponding unit eigenvectors.
Education
Cone Volume Calculator
Calculate the volume of a cone using the formula V = (1/3)πr²h with radius and height inputs.
Education
Law of Sines Calculator
Solve any triangle using a/sin(A) = b/sin(B) = c/sin(C) with AAS, ASA, and SSA cases, including the ambiguous case.
Education
Law of Cosines Calculator
Solve any triangle using c² = a² + b² − 2ab·cos(C) with SAS and SSS cases.
Education
Reference Angle Calculator
Find the positive acute reference angle for any angle in degrees or radians (including fractions of pi) with a unit circle visualizer and step-by-step rules.
Statistics & Probability
19 calculatorsEducation
Binomial Distribution Calculator
Compute individual and cumulative binomial probabilities for any number of trials and success rates.
Education
Average Calculator
Calculate the arithmetic mean, median, mode, range, and weighted average of any list of numbers.
Education
P Value Calculator
Convert a z-score to a p-value for a one-tailed or two-tailed test, with the area on each side of the curve.
Education
Variance Calculator
Compute sample and population variance, mean, count, and standard deviation from a list of numbers.
Education
Punnett Square Calculator
Create a 2x2 monohybrid cross Punnett square grid and calculate offspring genotype and phenotype ratios.
Education
Standard Deviation Calculator – Variance & SD
Use this sd calculator to compute sample and population standard deviation, variance, mean, and count from a list of numbers.
Education
Z Score Calculator
Calculate a z score from a raw score, mean, and standard deviation using z = (x − μ) / σ, with the formula, step by step work, and a plain English reading.
Education
Mean, Median, Mode & Range Calculator
Use this as a quick mean calculator, or find the median, mode, and range of any data set. Shows sorted values and step-by-step arithmetic.
Education
Median Calculator
Calculate the median or middle value from a list of numbers with step-by-step sorting and math shown.
Education
Mode Calculator
Calculate the mode or most-frequently occurring value from a list of numbers, with multi-mode support and frequency tables.
Education
Margin of Error Calculator
Calculate margin of error from sample size, confidence level, and sample proportion. Returns the standard error, z-score, and the confidence range.
Education
Confidence Interval Calculator
Calculate a confidence interval for a mean or a proportion. Returns the lower and upper bounds, margin of error, and standard error.
Education
Correlation Coefficient Calculator
Calculate the Pearson correlation coefficient r from paired x and y values. Returns r, r squared, and a plain-English strength label.
Education
Linear Regression Calculator
Calculate the simple linear regression line from paired x and y values. Returns slope, intercept, the equation y = mx + b, r, r squared, and an optional predicted y.
Education
T-Test Calculator
Calculate a one-sample or two-sample (Welch) independent t-test. Returns the t statistic, degrees of freedom, standard error, and mean difference.
Education
Binomial Probability Calculator
Calculate binomial probability for n trials, k successes, and per-trial probability p. Supports exact, at-most, and at-least modes.
Education
Poisson Distribution Calculator
Calculate Poisson probabilities for an average rate lambda and event count k. Supports exact, at-most, and at-least modes.
Education
Normal Distribution Calculator
Calculate normal distribution probabilities from a raw score or z-score. Supports left tail, right tail, and between-two-values modes.
Education
Probability Calculator
Find single-event probability, the complement, A and B for independent events, A or B for independent events, and the probability of at least one success across n trials. Decimal, percent, and step notes.
Numbers & Fractions
22 calculatorsEducation
Time to Decimal Calculator
Convert hours and minutes (HH:MM) to decimal hours and back for timesheets, payroll, or math problems.
Education
Acceleration Calculator
Calculate physical acceleration from a change in velocity over time (a = Δv/Δt) or from applied force and mass (a = F/m).
Education
Percentage Increase Calculator – Percent Change
Use our percent increase calculator to compute the percentage change between two values with absolute difference and growth multiplier.
Education
Percent Error Calculator
Calculate percent error from an accepted value and an experimental value, with the formula, absolute error, and step by step work for math, chemistry, and physics.
Education
Decimal Calculator
Calculate sums, differences, products, and quotients with decimal numbers. See step-by-step math breakdowns for each operation.
Education
Percentage Calculator – 3 Ways to Calculate %
Use this percent calculator to find the percentage of a number, percentage change, and other percent calculations with step-by-step math.
Education
Percent Calculator
Calculate X percent of Y, what percent X is of Y, percent increase or decrease, and percent change between two numbers.
Education
Scientific Notation Calculator
Convert standard numbers to scientific notation (a × 10^b) and back. Returns the coefficient, exponent, and a short explanation of the decimal-point shift.
Education
Remainder Calculator
Find the quotient and a non-negative remainder from integer division. Returns the division statement and modulo notation.
Education
GCF Calculator
Find the greatest common factor of two or more whole numbers using the Euclidean algorithm, with factor lists and step by step work.
Education
LCM Calculator
Find the least common multiple of two or more whole numbers using the GCF identity, folded across the list, with step by step work.
Education
Ratio Calculator
Simplify a ratio A : B by dividing both sides by their greatest common factor. Optional cross-multiplication check against a second ratio C : D.
Education
Proportion Calculator
Solve a proportion A : B = C : D for one missing value using cross multiplication. Returns the missing value and the worked step.
Education
Rounding Calculator
Round a number to decimal places, significant figures, or to the nearest whole, ten, hundred, or thousand. Supports standard, round-up, and round-down modes.
Education
RREF Calculator
Convert a 2x2, 2x3, 3x3, or 3x4 matrix to reduced row echelon form using Gauss-Jordan elimination. Returns the RREF matrix, the matrix rank, and a solution reading for augmented systems.
Education
Sig Fig Calculator
Count significant figures in any number and round it to a chosen number of sig figs. Explains which digits count, shows the rounded value, and renders the scientific notation form.
Education
Percent Yield Calculator
Calculate percent yield, actual yield, or theoretical yield using % yield = actual / theoretical x 100. Supports grams, kilograms, milligrams, and moles. Educational chemistry only.
Education
Percent Decrease Calculator
Calculate percent decrease between two values. Enter original and new values; returns decrease amount, percent decrease, and multiplier. Detects increases and reports them clearly.
Education
Gear Ratio Calculator
Calculate gear ratio from driver and driven gear teeth counts. Returns gear ratio, output RPM at a given input RPM, and an ideal output torque estimate given an input torque.
Education
Percentage Decrease Calculator
Calculate the percent decrease between two numbers with the formula ((old - new) / old) × 100.
Education
Multiplication Chart (1-12 & 1-100) – Free Printable
Free interactive multiplication chart with 1-12, 1-15, and 1-20 grids plus a static 1-100 times table. Print clean grid worksheets directly from your browser.
Education
List of Prime Numbers (1 to 1000 Grid)
A complete list of prime numbers from 1 to 1000 in a clean grid highlights the first 100 primes and offers a prime checker helper.
Chemistry & Physics
5 calculatorsEducation
Speed Calculator
Solve for speed, distance, or time using the basic motion formula v = d/t.
Education
Density Calculator
Calculate density from mass and volume, or solve for mass or volume. Supports metric and US customary units.
Education
Stoichiometry Calculator
Calculate chemical reaction yields and mole ratios based on balanced equation coefficients.
Education
Grams to Moles Calculator
Convert grams to moles, moles to grams, or solve for molar mass using n = m / M. Manual molar mass input plus common compound presets like H2O, CO2, NaCl, O2, HCl, and glucose.
Education
Molality Calculator
Solve molality (mol/kg) = moles of solute / kg of solvent for any of the three variables, with an optional grams-to-moles helper. Includes a clear molality vs molarity reminder.
Time & Age
6 calculatorsEducation
Deadline Calculator
Calculate a target deadline date by adding calendar days or business days to a starting date.
Education
Audiobook Calculator
Calculate your actual listening time and time saved when playing back audiobooks or podcasts at faster speeds (1x to 3x).
Education
Chronological Age Calculator
Calculate exact age in years, months, and days for educational testing, developmental assessments, and standardized test scoring.
Education
Time Calculator
Calculate time math with three modes: find the duration between two times, add or subtract a duration from a clock time, or add or subtract two durations. Works as a time calculator, time duration calculator, duration calculator, hours calculator, minutes calculator, elapsed time calculator, clock time calculator, add time calculator, subtract time calculator, and time between two times calculator.
Education
Date Calculator
Calculate days between dates, add or subtract days from a date, count business days, and find days from today. Works as a date calculator, date duration calculator, days between dates calculator, add days calculator, subtract days calculator, business days calculator, calendar calculator, countdown calculator, and weekday calculator.
Education
Voltage Drop Calculator
Estimate voltage drop for a copper or aluminum wire run. Inputs: voltage, current, one-way length, circuit type, and gauge or custom resistance. Returns voltage drop, percent drop, and voltage at the load.
Other
55 calculatorsEducation
Expected Value Calculator
Calculate the expected value, variance, and standard deviation of a discrete random variable distribution.
Education
Amps to Watts Calculator
Convert electric current in amps to power in watts for DC, single-phase AC, and three-phase AC circuits.
Education
Watts to Amps Calculator
Convert electric power in watts to electric current in amps for DC, single-phase AC, and three-phase AC circuits.
Education
Kilowatts to Amps Calculator
Convert electric power in kilowatts (kW) to electric current in amps for DC, single-phase AC, and three-phase AC.
Education
Horsepower to Amps Calculator
Convert motor mechanical horsepower (HP) to electric current in amps for DC, single-phase, and three-phase AC motors.
Education
Asymptote Calculator
Analyze rational functions to find vertical asymptotes, horizontal asymptotes, slant (oblique) asymptotes, and removable discontinuities (holes).
Education
eDPI Calculator
Calculate your effective gaming mouse sensitivity (eDPI) by multiplying hardware DPI by in-game sensitivity.
Education
MCAT Score Calculator
Convert your 4 section scores into a total MCAT score (472-528) and find your AAMC percentile.
Education
Force Calculator
Calculate force using F = ma (Newton's 2nd Law), F = mg (weight), or F = kx (spring force) with unit conversions.
Education
Velocity Calculator
Calculate velocity from distance and time or from initial velocity, acceleration, and time. Features vector direction support.
Education
Binary Calculator
Convert numbers between binary, octal, decimal, and hexadecimal. Perform binary addition, subtraction, multiplication, division, and bitwise operations.
Education
Exponential Growth Calculator
Solve continuous growth (A = Pe^(rt)) and discrete growth (A = P(1+r)^t) formulas. Find initial value, rate, time, or final value.
Education
Circumference Calculator
Calculate the circumference of a circle from the radius or diameter. Includes a visual diagram and bonus area output.
Education
Triangular Prism Calculator
Calculate the volume and surface area of a triangular prism with base, height, length, and optional side inputs.
Education
Pyramid Volume Calculator
Calculate the volume of a square or rectangular pyramid using the base length, base width, and height.
Education
SOHCAHTOA Calculator
Solve a right triangle using SOHCAHTOA trig ratios. Input any two side lengths to find the third side, angles, and trigonometric ratios.
Education
Sin Cos Tan Calculator
Calculate sine, cosine, and tangent values for any angle in degrees or radians. Shows reciprocal functions csc, sec, and cot.
Education
Distance Formula Calculator
Find the distance between two points (x₁, y₁) and (x₂, y₂) using the distance formula. Decimal, negative, and exact-radical results all supported.
Education
Midpoint Formula Calculator
Find the midpoint between two points (x₁, y₁) and (x₂, y₂) on a coordinate plane. Decimals, negatives, and exact ordered-pair output supported.
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Square Root Calculator
Calculate the square root of any number with step by step work. Find the decimal value, simplified radical form, and perfect square check. Works as a square root calculator, sqrt calculator, radical calculator, perfect square calculator, simplify square root tool, and reference for the square root formula. Useful for calculate square root problems and square root examples in algebra and geometry.
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Exponent Calculator
Raise any base to any exponent and get the result with step by step work, scientific notation, and a plain English explanation. Works as an exponent calculator, exponents calculator, power calculator, powers calculator, base and exponent calculator, negative exponent calculator, fractional exponent calculator, and reference for the exponent formula. Useful for calculate exponents problems and exponent examples in algebra and pre-algebra.
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Volume Calculator – Cylinder, Sphere, Cone & More
Calculate the volume of common 3D shapes including cylinder volume, rectangular prism, sphere, cone, and pyramid. Includes formulas and cubic unit conversions.
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Log Calculator
Calculate logarithms in any base, plus common log (log base 10) and natural log (ln), and solve for the missing exponent in b^y = x. Works as a log calculator, logarithm calculator, natural log calculator, ln calculator, log base calculator, common log calculator, and reference for the log formula. Useful any time you need to calculate logarithm values for algebra, science, or engineering problems.
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Logarithm Calculator
Compute log base 10, natural log (ln), and logarithms with any custom base. Shows step-by-step calculation.
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Scientific Calculator
Free online scientific calculator with sin, cos, tan, asin, acos, atan, log, ln, square root, exponents, factorial, π, e, and parentheses. Toggle degrees and radians for trig functions. Works as a scientific calculator, online scientific calculator, math calculator, advanced calculator, trig calculator, logarithm calculator, exponent calculator, and square root calculator. A practical scientific calculator online for everyday math, algebra, and trigonometry problems, including any calculator with sin cos tan support.
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Permutation Calculator
Calculate P(n, r) for arrangements where order matters. Supports without-repetition and with-repetition modes.
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Permutations Calculator
Calculate nPr permutations for ordered arrangements. Supports arrangements with or without repetition.
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Combination Calculator
Calculate C(n, r) for unordered selections, using the multiplicative form for stability across small and large inputs.
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Combinations Calculator
Calculate nCr combinations for unordered selections. Supports choices with or without repetition allowed.
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Long Division Calculator
Divide two whole numbers and see the quotient, remainder, decimal result, and mixed-number form. Handles decimal inputs as a fall-through decimal answer.
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Mixed Number Calculator
Convert improper fractions to mixed numbers and back. Returns the simplified form and the decimal equivalent.
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Area Calculator – Find the Area of a Shape
Find the area of a shape from one tool. Supports circle, triangle, rectangle, and other common 2D geometric shapes.
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Surface Area Calculator
Calculate the surface area of common 3D shapes: rectangular prism, cube, cylinder, sphere, cone, and square pyramid. Pairs with the volume calculator.
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Molarity Calculator
Find molarity, moles, volume, or mass from any three known values using M = n / V (and n = m / M when molar mass is supplied). Educational chemistry only, not lab or dosing advice.
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Dilution Calculator
Solve M1V1 = M2V2 for any of the four variables, find the dilution factor, and plan simple serial dilutions. Supports mL and L. Educational chemistry only, not lab or dosing advice.
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pH Calculator
Convert between pH, pOH, hydrogen ion concentration, and hydroxide ion concentration using pH = -log10[H+] and pH + pOH = 14 (at 25 C). Educational chemistry only.
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Ideal Gas Law Calculator
Solve PV = nRT for pressure, volume, moles, or temperature. Supports common units: atm, kPa, Pa, mmHg, psi; L, mL, m3; K, C, F. Assumes ideal gas behavior.
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Molecular Weight Calculator
Calculate molar mass (molecular weight) in g/mol from a chemical formula. Supports nested parentheses and groups like H2O, CO2, NaCl, C6H12O6, Ca(OH)2, and K3[Fe(CN)6].
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ERA Calculator
Calculate a pitcher's Earned Run Average (ERA) based on earned runs allowed, innings pitched, and game length.
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Simplify Calculator
Simplify fractions, square roots, and ratios. Reduces fractions using GCD, extracts perfect-square factors from radicals, and reduces ratios by their greatest common divisor.
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Ohm's Law Calculator
Solve Ohm's law and the power relationships. Enter any two of voltage, current, resistance, or power; the calculator returns the other two with the formulas used.
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Mod Calculator
Calculate the modulo (mod) of two numbers — the remainder when one number is divided by another.
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Summation Calculator
Evaluate sums in sigma notation by specifying the starting index, ending index, and the expression to be summed.
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Cube Root Calculator
Find the cube root of any positive or negative number, with step-by-step explanation and perfect cube examples.
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y = mx + b Calculator
Find the slope-intercept form of a line from two points, point-slope, or slope and y-intercept.
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IQR Calculator
Find the interquartile range, quartiles Q1, Q2, Q3, and identify outliers using the 1.5×IQR rule.
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Arithmetic Sequence Calculator
Find any specific term (a_n) or the cumulative sum (S_n) of an arithmetic sequence. Features detailed formula substitution steps and an interactive term sequence progression table.
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Geometric Sequence Calculator
Calculate the nth term (a_n), finite sum (S_n), or infinite sum (S) of a geometric sequence. Includes step-by-step derivation and convergence analysis.
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Standard Error Calculator
Calculate the standard error of the mean (SEM) from a list of sample values or directly from the standard deviation and sample size. Features step-by-step math and the 95% confidence interval margin of error.
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Radical Calculator
Simplify radicals, square roots, cube roots, and higher-order nth roots to their simplest radical form. Features prime factorization step-by-step breakdowns and decimal approximations.
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Linear Approximation Calculator
Calculate the tangent line approximation L(x) = f(a) + f'(a)(x - a) for any mathematical function f(x). Compares the linear estimate against the true function value and calculates absolute error.
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PEMDAS Calculator
Evaluate any math expression step-by-step following the order of operations (Parentheses, Exponents, Multiplication, Division, Addition, Subtraction).
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Axis of Symmetry Calculator
Find the vertical line of symmetry and vertex coordinates for any quadratic equation in standard or vertex form step-by-step.
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End Behavior Calculator
Determine the limits of a polynomial function as x approaches positive and negative infinity using the leading coefficient test.
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Combined Gas Law Calculator
Solve the combined gas law equation (P1·V1)/T1 = (P2·V2)/T2 for pressure, volume, or temperature.