Geometry
Areas, volumes, perimeters and triangles
3 calculators
In this category
Area Find the area and perimeter of nine common shapes, entering each dimension in whatever unit you have to hand. Volume Find the volume and capacity of eight solids, from a packing box to a cylindrical tank, in any unit you need. Right triangle Solve a right triangle from any two measurements: the missing side, both angles, the area and the perimeter.
Work out the area of a surface, the volume of a solid, the perimeter of a shape or the missing side of a right triangle — for homework or for estimating how much paint or material you need.
Each calculator shows the formula and the numbers substituted into it, so the result can be checked by hand.