How to Convert Square Feet to Cubic Feet

How to Convert Square Feet to Cubic Feet
••• Alberto Masnovo/iStock/GettyImages

To convert square feet to cubic feet, you're going to need to do some measuring. The formula for a square or rectangular object's cubic feet is its length times width times height, or:

\text{volume}=LWH

You might use this formula to figure out how many cubic feet of soil to buy for your garden, for example, or to determine how many ounces of pesticide to use when releasing a bug bomb inside a room of your house.

TL;DR (Too Long; Didn't Read)

To convert a measurement in square feet to cubic feet, multiply by the measurement of the missing dimension (either length, width or height).

    Measure the object's height in feet. (You have already measured the object's length and width to get its measurement in square feet.)

    Divide that number by 12 to get its measurement in feet, if you measured the object in inches. If the object is 6 inches tall, it is 0.5 feet.

    Multiply the object's height in feet by its square foot measurement to convert from square feet to cubic feet. So if you are measuring a garden bed that is 3 feet wide by 6 feet long and 0.5 feet high, its dimensions in cubic feet are:

    3\text{ ft}\times 6\text{ ft}\times 0.5\text{ ft}=9\text{ ft}^3

    Note that the size of the garden bed could also be expressed as 18 ft2 by 0.5 ft high, and thus calculated as 18 ft2 × 0.5 ft, but the result is the same: 9 ft3.

    Things You'll Need

    • Ruler or tape measure
    • Calculator

    Warnings

    • This formula works only for square or rectangular objects.

Related Articles

How to Calculate Volume
How to Write Number Measurement Dimensions
What Is the Difference Between Yards & Feet?
How to Calculate Volume From Centimeters
How to Calculate Liters
How to Calculate Volume of a Rectangular Prism
How to Convert Centimeters to Centimeters Squared
Ways to Determine Density
How to Determine Square Feet Area
How to Find Density
How to Calculate the Change in Internal Energy
How to Find the Volume of a Sphere in Terms of Pi
How to Calculate Area of a Triangle
How to Calculate the Volume of Water to Fill a Rectangular...
How to Find the Area of a Rectangle
How to Calculate the Velocity of an Object Dropped...
How to Convert Square Metres to Lineal Metres
How to Calculate Area From Width & Length
How to Calculate Area, Perimeter and Volume
How to Determine Density