Volume
Volume is a three dimensional measure of space within an object. Below are a variety of objects with the formula for their volume. Volumes are measured in units3.
Cuboid

l × w × h
Prism
cross-sectional area × l
Pyramid
1/3 l w h
(1/3 × base-area × h )
Cone

1/3
r2 h
Sphere

4/3
r3
Cylinder
r2 h