You Will Need
 Object to be measured
 Geometric formulas
 Water
 Graduated cylinder
Steps

Step 1
Consider a rectangular or cubic solid
Consider a rectangular or cubic solid. Measure the length, width, and height of the object. Multiply these dimensions together to get the volume.

Step 2
Look at a cylindrical object
To find the volume of a cylinder, multiply the square of its radius by pi, or 3.14. Then multiply this value by the height of the cylinder.

Step 3
Calculate the volume of a cone
Calculate the volume of a cone. Measure the area of the cone's base  pi times the radius squared  then multiply by the height and divide by 3.

Step 4
Measure a sphere
Measure the radius of a sphere, then calculate the volume by multiplying 4/3 times pi times the cube of the radius.

Step 5
Use water displacement
Place a solid object whose volume is to be measured in a graduated cylinder that has been partially filled with water. Measure the amount of water displaced by the object  this is the object's volume.