17 calculators
Converters calculators
Unit and measurement converters: length, weight, temperature, volume, area, speed, time units, energy, pressure, and data storage.
Popular Converters calculators
Converters
Length Converter
Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards, miles, and nautical miles.
Converters
Weight Converter
Convert weight and mass units: milligram, gram, kilogram, metric tonne, ounce, pound, stone, US ton, and imperial ton.
Converters
Temperature Converter
Convert between Fahrenheit, Celsius, Kelvin, and Rankine using exact formulas. Flags impossible values below absolute zero.
Converters
Volume Converter
Convert volume units across metric (mL, L, cubic centimeter, cubic meter), US liquid (tsp, tbsp, fl oz, cup, pint, quart, gallon), and cubic (in³, ft³, yd³).
Converters
Area Converter
Convert area units: square millimeter, square centimeter, square meter, square kilometer, square inch, square foot, square yard, acre, hectare, and square mile.
Converters
Speed Converter
Convert between meters per second, kilometers per hour, miles per hour, feet per second, and knots.
Converters
Time Unit Converter
Convert between milliseconds, seconds, minutes, hours, days, weeks, months, and years. Months and years use documented average lengths.
Converters
Pressure Converter
Convert between pascal, kilopascal, bar, atmosphere, psi, mmHg, and torr. Use-case neutral, unit conversion only.
Mechanical & Physical
7 calculatorsConverters
Length Converter
Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards, miles, and nautical miles.
Converters
Weight Converter
Convert weight and mass units: milligram, gram, kilogram, metric tonne, ounce, pound, stone, US ton, and imperial ton.
Converters
Volume Converter
Convert volume units across metric (mL, L, cubic centimeter, cubic meter), US liquid (tsp, tbsp, fl oz, cup, pint, quart, gallon), and cubic (in³, ft³, yd³).
Converters
Area Converter
Convert area units: square millimeter, square centimeter, square meter, square kilometer, square inch, square foot, square yard, acre, hectare, and square mile.
Converters
Pressure Converter
Convert between pascal, kilopascal, bar, atmosphere, psi, mmHg, and torr. Use-case neutral, unit conversion only.
Converters
Density Converter
Convert density between kg/m³, g/cm³, g/mL, lb/ft³, lb/in³, and lb/gal US. Handy for materials, chemistry, and bulk-material orders.
Converters
Torque Converter
Convert torque between newton meters (N·m), kilonewton meters, pound feet (lb·ft), pound inches, ounce inches, and kilogram-force meters. Useful for fasteners, automotive, and physics.
Thermodynamics & Energy
4 calculatorsConverters
Temperature Converter
Convert between Fahrenheit, Celsius, Kelvin, and Rankine using exact formulas. Flags impossible values below absolute zero.
Converters
Energy Converter
Convert between joules, kilojoules, calories, kilocalories (food Calories), watt-hours, kilowatt-hours, and BTU. Disambiguates cal vs kcal clearly.
Converters
Power Converter
Convert between watts, kilowatts, megawatts, mechanical horsepower, BTU per hour, and foot-pounds per second. Useful for engineering, HVAC, and physics homework.
Converters
Fuel Economy Converter
Convert fuel economy between US mpg, Imperial mpg, kilometers per liter, miles per liter, and L per 100 km. Handles the inverse relationship of L/100 km carefully and requires positive values.
Time & Motion
4 calculatorsConverters
Speed Converter
Convert between meters per second, kilometers per hour, miles per hour, feet per second, and knots.
Converters
Time Unit Converter
Convert between milliseconds, seconds, minutes, hours, days, weeks, months, and years. Months and years use documented average lengths.
Converters
Angle Converter
Convert between degrees, radians, gradians, turns, arcminutes, and arcseconds. All conversions go through degrees internally for consistent accuracy.
Converters
Frequency Converter
Convert between Hz, kHz, MHz, GHz, THz, cycles per minute, and RPM. Useful for radio, audio, electronics, and mechanical rotation problems.