Loading...
Loading...
Calculate area and perimeter for common geometric shapes.
Select rectangle, circle, triangle, trapezoid, or ellipse.
Type the required measurements for your shape.
See area and perimeter calculated instantly.
Rectangle, circle, triangle, trapezoid, and ellipse.
Both measurements calculated simultaneously.
Updates as you type with no submit button needed.
All calculations run locally in your browser.
It works with any unit — just keep all dimensions in the same unit system.
It approximates an isosceles triangle from base and height.