# Perimeter Calculator

> Calculate the perimeter (or circumference) of common 2D shapes: rectangle, triangle, circle, trapezoid, parallelogram, and regular polygon.

**URL:** https://www.calculatoranswers.com/perimeter-calculator
**Category:** Education

## Quick Answer

Find the boundary length of 2D shapes. Select your shape and enter its dimensions to compute the total perimeter.

## Definition

A perimeter calculator is a geometry utility that computes the boundary length of various two-dimensional shapes. The calculator supports rectangles, circles (circumference), triangles, trapezoids, parallelograms, and regular polygons. It applies the specific geometric formula for each shape, summing the side lengths or calculating boundaries using radii and pi. Homeowners, landscapers, and students use this tool to estimate fencing requirements, determine material borders, and verify academic geometry calculations.

## How to Use

1. **Select the shape** — Choose the geometric shape you want to calculate the perimeter for.
2. **Enter dimensions** — Input the required side lengths, radius, or diameter in the fields.
3. **Read total perimeter** — View the calculated perimeter along with the specific formula used.

## Disclaimer

This calculator provides estimates for educational and planning purposes. Always consult a qualified professional for specific advice on financial, medical, legal, or other regulated decisions.

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