Area Calculator
Pick a shape and enter dimensions.
Inputs
Results
Area
50
Formula
Rect: L×W. Circle: π × (d/2)². Triangle: ½ × base × height.
Example
10×5 rectangle = 50.
What the Area Calculator does
The Area Calculator handles the exact area math you learned in school, but instantly and without arithmetic mistakes. It's useful for homework checking, day-to-day conversions, and quick sanity checks.
How to use it
Fill in the fields you know and the Area Calculator solves for the missing one. Every result is labeled clearly, so it's obvious what you're looking at.
Frequently asked questions