CCF to Gallons Converter

Water utilities in the U.S. often bill in CCF, hundreds of cubic feet. One CCF is about 748.05 U.S. gallons, so a household using 6 CCF a month uses roughly 4,488 gallons.

How to use the CCF to Gallons Converter

1. Type the number of CCF into the CCF field. Decimals such as 0.5 are fine.
2. Read the answer in US gallons. It updates as you type, with no button to press. The same amount is also shown in ft³, m³, L.
3. To go from US gallons back to CCF, type into the US gallons field instead. Every field also has a unit menu with all 27 volume units, for example L, mL, cL, dL, m³, cm³ (cc), µL, UK gal, US dry gal, US qt.

Results update as you type, and everything is calculated in your browser.

How it works

Both units measure volume, so they are always in the same ratio: one CCF (100 ft³) equals 748.05195 US gallons. The calculator multiplies the number of CCF you type by 748.05195 to give US gallons, and when you type into the US gallons field it divides by the same factor to give CCF. Because the ratio never changes, doubling the CCF always doubles the US gallons, for example 2 CCF is 1,496.1039 US gal.

How to convert CCF to US gallons

1. Write down the value in CCF, for example 1 CCF.
2. Multiply by the conversion factor 748.05195 (because 1 CCF (100 ft³) = 748.05195 US gal).
3. 1 × 748.05195 = 748.05195 US gal.
4. To go back from US gallons to CCF, divide by 748.05195, or multiply by 0.0013368056.

CCF to US gal conversion table

Volume units explained

CCF (CCF)

CCF means one hundred cubic feet (the C is the Roman numeral for 100). U.S. water and gas utilities bill by the CCF.

US gallon (US gal)

The U.S. liquid gallon is exactly 231 cubic inches, about 3.785 litres. It is used for fuel, milk, water and paint in the United States.

Quick mental conversion

For a fast estimate, multiply CCF by about 750 to get US gallons; the error is about 0.3%. Use the calculator above when you need the exact figure.