Your utility bill measures gas or water usage in CCF, but everyday intuition runs in gallons, this calculator converts between the two instantly in either direction, so a bill line item actually means something.

How to use this CCF to gallons calculator

1. Enter a value in the CCF field to see the equivalent in gallons.
2. Or enter a value in the Gallons field to see the equivalent in CCF, either field updates the other automatically.

What CCF actually means

CCF stands for “Centum Cubic Feet”, the Roman numeral C means 100, so 1 CCF equals 100 cubic feet. It’s the standard billing unit used by natural gas and water utilities across the United States, chosen because cubic feet alone would produce inconveniently large numbers for typical household usage.

Why this conversion matters

Utility meters typically measure gas or water flow in cubic feet, then bill in CCF for convenience, but gallons are the unit most people actually think in for water usage, and many other flow-rate contexts (irrigation, pool filling, tank capacity) are specified in gallons too. Converting your CCF-denominated bill into gallons makes usage comparisons and household water-budgeting far more intuitive.

Frequently asked questions