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Great question. Lets say you have a 12 square foot garden, and you want to buy topsoil for it. Since topsoil is sold by the cubic foot, how many cubic feet of topsoil do you need for a 12 square foot garden?
The formula for Square feet is: length × width
The formula for Cubic feet is: length × width × height
Since we know the Square feet of the garden, we now have the conversion to Cubic feet:
(cubic feet) = (square feet) × (height in feet)
So.... If you wanted the topsoil to be 3 inches thick, you would need: 12 × 0.25 = 3. You would need 3 cubic feet of topsoil. Notice that I convert 3 inches to 0.25 feet before using the formula. All the measurements must be in the same units for it to work. And it will work for anything. Meters, feet, inches, just as long as all are the same.
Once again, here is the formula: (cubic feet) = (square feet) × (height in feet)
Or for meters: (cubic meters) = (square meters) × (height in meters) |