CCF to Gallons Conversion Calculator
Convert CCF (hundred cubic feet) to US liquid gallons, Imperial gallons, litres and cubic metres. CCF is a common billing unit for water and gas utilities in the United States.
CCF
1 CCF = 748.052 US liquid gallons (100 ft³ × 7.48052 gal/ft³)
- 1
Cubic feet = CCF × 100
1 × 100 = 100 - 2
US gallons = ft³ × 7.4805
100 × 7.4805 = 748.0521 cubic foot = 7.48052 US liquid gallons (1,728 in³ ÷ 231 in³/gal).
How does this calculator work?
CCF = hundred cubic feet. 1 CCF equals 748.052 US liquid gallons (100 ft³ × 7.48052 gal/ft³), 2,831.7 litres, or 2.832 cubic metres. Multiply your CCF reading by 748.052 to get gallons. Used for water and natural-gas billing in the United States.
Formula
How this is calculated
CCF stands for hundred cubic feet — the prefix C comes from the Roman numeral for 100. Water and natural-gas utilities in the United States bill in CCF because it is a convenient size: one CCF of water weighs roughly 748 pounds and represents a volume of 100 cubic feet or about 2.83 cubic metres.
The conversion is derived from the definition of the US liquid gallon: exactly 231 cubic inches. One cubic foot contains 12³ = 1,728 cubic inches, so 1 ft³ = 1,728 ÷ 231 = 7.48052 gallons. Multiplying by 100 gives 748.052 gallons per CCF. The litre and cubic-metre equivalents use the exact relationship 1 foot = 30.48 cm, giving 1 ft³ = 28.3168 litres.
Note that the same unit label (CCF or "hundred cubic feet") is used for both water and natural gas, but the energy content of a CCF of gas depends on the gas composition — for energy conversions, see the CCF to Therms calculator.
Frequently asked questions
Exactly 748.052 US liquid gallons. This comes from the definition: 1 cubic foot = 7.48052 gallons, and 1 CCF = 100 cubic feet.
US water utilities measure consumption in CCF because flow meters are calibrated in cubic feet and billing software rounds to the nearest hundred. Each CCF on your bill represents 100 cubic feet or about 748 gallons of water used.
Yes — the volume is the same (100 cubic feet). But water is essentially incompressible, while gas volume at the meter depends on pressure. Gas utilities typically correct meter readings to a standard pressure (usually 14.73 psia) before converting to CCF.
TG we-Calculate Editorial Team. (2026). CCF to Gallons Conversion Calculator [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/ccf-to-gallons-conversion-calculator
TG we-Calculate Editorial Team. "CCF to Gallons Conversion Calculator." TG we-Calculate. 2026. https://we-calculate.com/calculator/ccf-to-gallons-conversion-calculator.
TG we-Calculate Editorial Team, "CCF to Gallons Conversion Calculator," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/ccf-to-gallons-conversion-calculator
@misc{wecalculate_ccf_to_gallons_conversion_calculator, title = {CCF to Gallons Conversion Calculator}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/ccf-to-gallons-conversion-calculator}}, year = {2026}, note = {TG we-Calculate} }
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