# CCF to Gallons Converter URL: https://speedycalculator.com/calculators/conversion/ccf-to-gallons-conversion/ Last updated: 2026-10-25 > Convert CCF (CCF) to US gallons (US gal): 1 CCF (100 ft³) = 748.05195 US gal, so multiply by 748.05195 or divide by 0.0013368056. Both fields are editable, so you can also type in US gallons and get CCF back. ## Inputs - CCF (CCF) ## Results - US gallons ## Formula ``` 1 CCF = 748.05195 US gal 1 US gal = 0.0013368056 CCF US gal = CCF × 748.05195 ``` ## Explanation 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 - Type the number of CCF into the **CCF** field. Decimals such as 0.5 are fine. - Read the answer in **US gallons** – it updates as you type, with no button to press. - To convert the other way, type into **US gallons** and the CCF are recalculated. - 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 - Write down the value in CCF, for example **1 CCF**. - Multiply by the conversion factor 748.05195 (because 1 CCF (100 ft³) = 748.05195 US gal). - 1 × 748.05195 = **748.05195 US gal**. - To go back from US gallons to CCF, divide by 748.05195 – or multiply by 0.0013368056. ### CCF to US gal conversion table CCFUS gallonsUS gallonsCCF0.5 CCF374.02597 US gal1 US gal0.0013368056 CCF1 CCF748.05195 US gal2 US gal0.0026736111 CCF2 CCF1,496.1039 US gal5 US gal0.0066840278 CCF3 CCF2,244.1558 US gal10 US gal0.013368056 CCF4 CCF2,992.2078 US gal20 US gal0.026736111 CCF5 CCF3,740.2597 US gal50 US gal0.066840278 CCF6 CCF4,488.3117 US gal100 US gal0.13368056 CCF8 CCF5,984.4156 US gal1,000 US gal1.3368056 CCF10 CCF7,480.5195 US gal15 CCF11,220.779 US gal20 CCF14,961.039 US gal ### 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. ## Worked example Inputs — CCF: 1 CCF. Results — **US gallons = 748.05194805 US gal**. ## FAQ **How many gallons in 1 CCF?** About 748.05 US gal. **What does HCF mean on a water bill?** Same as CCF: one hundred cubic feet. **How many US gallons are in one CCF (100 ft³)?** 1 CCF = 748.05195 US gal. **How many CCF are in one US gallon?** 1 US gal = 0.0013368056 CCF. **How do I convert CCF to US gallons?** Multiply the number of CCF by 748.05195. For example, 1 CCF × 748.05195 = 748.05195 US gal. **How do I convert US gallons back to CCF?** Divide by 748.05195 (or multiply by 0.0013368056), or simply type the value into the US gallons field above. **What is 10 CCF in US gallons?** 10 CCF = 7,480.5195 US gal. **What is 5 CCF in US gallons?** 5 CCF = 3,740.2597 US gal. **Is this conversion exact?** Yes. The factor comes from the official definitions of both units (NIST and the SI), so the only difference you may see is rounding in the last displayed digit. **Can I convert to other units on this page?** This page converts only between CCF and US gallons. To pick any volume unit, use the general volume converter linked under Related calculators. **What formula does the CCF to Gallons Converter use?** 1 CCF = 748.05195 US gal. ## Sources - [NIST Special Publication 811 – Guide for the Use of the International System of Units](https://www.nist.gov/pml/special-publication-811) - [NIST Handbook 44 Appendix C – General tables of units of measurement](https://www.nist.gov/pml/owm/nist-handbook-44-current-edition)