Geometry & Construction Calculators
Measure shapes and plan building projects. Enter any unit you like; results are shown in the matching square or cubic units.
Circle Area Calculator
Area, circumference, radius and diameter from any one of them.
Concrete Volume Calculator
Cubic metres or yards of concrete for slabs and columns, plus bags.
Rectangle Area Calculator
Area, perimeter and diagonal of a rectangle or square.
Triangle Area Calculator
Area from base and height, three sides (Heron) or two sides and an angle.