Calculate lengths, areas, perimeters, volumes and surface areas for supported two-dimensional and three-dimensional shapes.
Which calculator should I use?
Choose area and perimeter for a flat shape or boundary, and volume and surface area for a solid. Convert measurements to consistent units first. Check that the selected shape matches the object; irregular objects may require several separate calculations.
Available calculators
Area and Perimeter Calculator
Area and boundary length for a rectangle, triangle, circle, trapezoid, or rectangle with a rectangular cutout.
Volume and Surface Area Calculator
Calculate volume and exterior surface area of common closed solids.