Converting Square Feet to Cubic Feet

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<h3>Converting Square Feet to Cubic Feet</h3>

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).

1. Measure the Extra Dimension

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

2. Convert Inches to Feet if Necessary

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.



3. Convert From Square Feet to Cubic 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:

(3text{ ft}times 6text{ ft}times 0.5text{ ft}=9text{ 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 Needed

  • Ruler or tape measure
  • Calculator

Warning

This formula works only for square or rectangular objects.

Dave Pennells

By Dave Pennells

Dave Pennells, MS, has contributed his expertise as a career consultant and training specialist across various fields for over 15 years. At City University of Seattle, he offers personal career counseling and conducts workshops focused on practical job search techniques, resume creation, and interview skills. With a Master of Science in Counseling, Pennells specializes in career consulting, conducting career assessments, guiding career transitions, and providing outplacement services. Her professional experience spans multiple sectors, including banking, retail, airlines, non-profit organizations, and the aerospace industry. Additionally, since 2001, he has been actively involved with the Career Development Association of Australia.