The volumes of certain simple objects such as cubes and prisms can be calculated using formulae.
Units of Volume
 The basic unit for volume is the cubic metre, written m^{3}.
 1 cubic metre is the volume occupied by a cube of length 1 metre.
 Smaller volumes are often measured in cubic centimetres, cm^{3}, sometimes called cc.
 1 litre = 1000 cm^{3}
1 mL = 1 cm^{3} (1 cc)
Volume formulae
The following formulae can be memorised, although in exams often the formulae needed for a question are provided. You should certainly memorise the simpler ones.
Solid Name

Diagram

Volume

Cube 
V = l × l × l = l^{3} 

Cuboid or Rectangular Prism 
V = (shaded area) × l 

Prism 
V = (shaded area) × l =(^{1}⁄_{2} × b × h) l 

V = ^{1}⁄_{3} × (area of base) × h 
Try this useful activity on the volume and surface area of cuboids and triangular prisms.