Adjust the inputs below. Results update as you type.
Each shape uses its standard geometric formula—rectangle: l × w; circle: π r²; triangle: ½ base × height; trapezoid: ½ (a+b) × h. Select the shape, enter the dimensions in your preferred unit, and the calculator converts the result to all common area units. Useful for flooring, landscaping, painting, and construction estimates.
40.0000