Conversions & Formulas

Area of a square:
Area = length x width, or length of one side (x) squared x2

Area of a rectangle:
Area = length x width

Area of a triangle:
Area = 1/2 x base x perpendicular height

Area of a pentagon (5 sides):
Area = square of the length of one side x 1.720

Area of a hexagon (6 sides):
Area = square of the length of one side x 2.598

Area of an octagon (8 sides):
Area = square of the length of one side x 4.828

Area of a cube:
Area = square of the length of one side x 6

Area of a sphere:

Area = square of the diameter x pi (3.1416)

Area of a circle:
Area = square of the radius x pi (3.1416)

Area of an ellipse:

Area = long diameter x short diameter x 0.7854

Circumference of a circle:
Circumference = diameter x pi (3.1416)

Volume of a cube:
Volume = cube (x³) of the length (x) of one side

Volume of a pyramid:
Volume = Area of the base x height x 1/3

Volume of a cylinder:
Volume = square of the radius (r²) of the base x pi (3.1416) x height

Volume of a sphere:
Volume = cube of the radius (r³) x I(3.1416) x 4/3

Volume of a cone:
Volume = square of the radius (r²) of the base x pi (3.1416) x height x 1/3

Volume of a rectangular solid:
Volume = length x width x height

When you know length:

When you know area:

When you know mass:

When you know liquid volume:

Cubic Measures

1,000 cu. milliliters (mm3) = 1 cu. Centimeter (cm³)

1,000 cu. centimeters = 1 cu. Decimeter (dm³)

1,000 cu. decimeters = 1 cu. Meter (ml) =1 stere