Area Calculator
Calculate the area of a rectangle, triangle, circle, or other common shape. Select a shape and enter the required dimensions.
Select shape
Tips: Use consistent units (e.g. metres or feet) for all dimensions. Select a shape first, then enter the values that apply.
FAQ
The area calculator supports common shapes such as rectangle, square, triangle, circle, and others. Enter the known dimensions to get the area.
Area = π × radius². If you know the diameter, divide it by two to get the radius first.
Using base and height: area = ½ × base × height, where height is perpendicular to the base.