Geometry

Areas, perimeters, volumes and shapes.

• Geometry

  Circle Calculator

  Know one measurement of a circle? Enter it to get the radius, diameter, circumference and area.

• Geometry

  Pythagorean Theorem Calculator

  Find a missing side of a right triangle from the other two.

• Geometry

  Area Calculator

  Pick a shape, enter its measurements and press Calculate.

• Geometry

  Volume Calculator

  Pick a solid, enter its measurements and press Calculate.

• Geometry

  Distance and Midpoint Calculator

  Enter two points to get the distance between them and the point halfway between.

• Geometry

  Surface Area Calculator

  Work out the total surface area of a cube, cuboid, cylinder, cone or sphere — exactly in terms of π, with each part shown.