Area Calculator

Calculate the area of a rectangle, square, triangle, circle, trapezoid, parallelogram or ellipse.

Shape

Measured in

Measurement a

Measurement b

Measurement c

Only some shapes use c.

a = length, b = width.

How to use area calculator

1Enter your valuesFill in the fields — example values are already there to start from.

2Adjust the optionsChange the choices to match your situation. Results update as you type.

3Use the resultRead it, or copy it with the Copy button.

Rectangle, square, triangle, circle, trapezoid, parallelogram and ellipse.

Yes, results show square metres, square feet and square yards.

No. Everything is worked out in your browser and nothing you type is sent to a server.