What would you like to measure?
Volume
The volume of something is the amount of 3-demensional space it occupies.
3-Demensional shapes include (but are not limited to):
Cubes
V=s^3
Spheres
V=4/3pi*r^3
Prisms
V=area of face*height
Cylinders
V=(pi*r^2)*h
Pyramids
V=Area of base*height *1/3
Or in terms: one third of the area of the base times the height