How to Calculate Volume
You can find the volume of various 3-D objects using a few simple mathematical formulas.
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You Will Need
- Object to be measured
- Geometric formulas
- Water
- Graduated cylinder
Steps
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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.
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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.
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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.
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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.
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Search the internet using the key words "volume" and "formulas" for volume formulas for less commonly shaped objects.
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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.
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About 96.5% of the world's water supply is held in the ocean, seas, and bays.
