How to Convert Square Feet to Cubic Feet

By Jacy Chance; Updated April 24, 2017
Break out the measuring tape to convert square feet to cubic feet.

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 L x W x H. 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.

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.


This formula works only for square or rectangular objects.

About the Author

Jacy Chance has 11 years' experience as a health and travel writer, book editor, promotional model and Meals on Wheels volunteer. Her writing has been published in 14 of her nonfiction anthologies, on the front page of Yahoo!, in humor anthologies and in magazines. Chance holds a B.A. in writing and mass communication, and studied psychology, anatomy, marketing and calculus.