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.
3. To convert the other way, type into US gallons and the CCF are recalculated.
4. Press Copy results to copy both values with the page title, or Copy link to share this exact conversion.

This page converts only CCF ⇄ US gal. Need a different unit? Use the general volume converter, where you can choose any “from” and “to” unit.

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. Results are calculated at full precision and rounded only for display (up to eight decimal places, with very large or small values shown in scientific notation).

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

What is a 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.

What is a US gallon?

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.

Common mistakes to avoid

Mixing u.s. and uk gallons, pints and fluid ounces, assuming a cup is always 250 ml, and treating volume and weight as interchangeable for anything except water.