MATH

Area Calculator

Area: Use one consistent length unit for all dimensions.

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Area Calculator for United States

Country or area

US · 12,345.67US customary measurementsRoad distance: miles

United States display and unit preferences. The stated calculation method is used. Review the labeled units before entering your values.

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Your details

Shape

Length / base / radius a

Width / height / radius b

Second parallel side (trapezoid)

Sector angle (degrees)

Results update instantly as you change the inputs.

Area

United States · calculated from your inputs

Your calculation, beautifully packaged.Download a report with this result, your inputs, the formula, and assumptions.

How this result was calculated

Rectangle ab; triangle ab/2; circle πa²; ellipse πab; trapezoid (a+c)b/2; sector πa²θ/360.
Country setup: United States. Displayed measurements are converted to the formula's base units internally.

Assumption: Use one consistent length unit for all dimensions. Results use its square or cube for area or volume. United States display and unit preferences. The stated calculation method is used. Review the labeled units before entering your values.

Calculation version 1.0.0 · Support state: generic

Guides & conversions

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Formula and method

Rectangle ab; triangle ab/2; circle πa²; ellipse πab; trapezoid (a+c)b/2; sector πa²θ/360.

This calculation uses the values you enter. It runs in your browser and does not request a location or account.

Worked example

A rectangle 5 by 4 has area 20 square units.

Questions people ask

Which method does this tool use?

Rectangle ab; triangle ab/2; circle πa²; ellipse πab; trapezoid (a+c)b/2; sector πa²θ/360.

What should I check before using the result?

Use one consistent length unit for all dimensions. Results use its square or cube for area or volume.