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Convert cubic feet to gallon [ft^3 to gal (US)]



cubic foot (ft^3)


gallon (US)


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Volume is the measurement measured in different ways in different applications. The flow of rivers is typically calculated in cubic feet per second. If we talk about the water flow in homes, it also usually measured in gallons per minute. Your water bill will indicate the amount of water used in the last month in terms of cubic feet, while statistics on domestic water usage will be given in gallons. So, how many gallons in a cubic foot and what if you need to perform conversions from cubic feet to gallons (ft3 to gal), don’t worry we have the fast solution for these units conversions. An online cubic feet to gallon converter by calculator-online is the smart tool that uses the standard formula to perform conversions from cubic foot to gallon within a fraction of seconds.

The formula that is used by our converter is discussed below; it helps you doing manual (step-by-step) conversions from cu ft to gallons.

Read on!

Did You Know!

  • 1 cubic foot (ft^3) is equal to 7.48052 US liquid gallon (gal)
  • 1 US liquid gallon (gal) is equal to 0.133681 cubic foot (ft^3)

Cubic feet to gallon Formula:

The formula for cf to gallons is:

US galo liquid = ft³ * 7.4805

How to convert cubic feet to gal (ft^3 to gal)?

Convert with:

  • online cubic cu ft to gallons converter
  • Formula (the below example helps you)

Example of cubic feet (ft3) to US liquid gallon (gal) conversion:

Problem: Convert 20 ft3 to gal?


Step 1 (Formula):

  • US galo liquid = ft³ * 7.4805

Step 2 (Put the Values):

  • US galo liquid = 20 * 7.4805

Step 3 (Result):

  • 149.61 US liquid gallons

Means, 20 cubic feet (ft3) is equal to 149.61 US liquid gallons (gal)

Cubic foot (ft3) to US liquid gallons (gal) conversion table: