The CCF to gallons calculator starts with hundreds of cubic feet. The gallons to cubic feet converter starts with US liquid gallons. They use the same volume relationship at different scales and in different directions.
| Feature | CCF to gallons | Gallons to cubic feet |
|---|---|---|
| Input | CCF | US liquid gallons |
| Operation | CCF × 172,800/231 | Gallons × 231/1,728 |
| Default primary | 1 CCF → 748.052 US gal | 10 US gal → 1.336806 ft³ |
| Primary format | Up to 3 fractional places | Up to 6 fractional places |
| Supporting results | CCF, ft³, m³, L | in³, L, m³, gallons per ft³ |
One CCF means 100 ft³. A cubic foot is 1,728 in³, and a US liquid gallon is 231 in³. The exact unit ratio is therefore 1,728/231 US gal per ft³. Its decimal expansion is approximately 7.48051948051948; that finite string is not an exact decimal factor. Multiplying the rational ratio by 100 gives the CCF multiplier.
The gallons form’s supporting factor row displays 7.48052 gal/ft³, fixed to five fractional places. Its conversion uses the underlying dimensional ratio rather than that displayed five-place number. The primary and other supporting rows trim zeros at their respective maxima. Copy on each form summarizes the entered quantity and formatted primary conversion.
Use CCF-first arithmetic when the supplied volume is in CCF, or gallon-first arithmetic when it is in US liquid gallons. These forms restate volume; they do not derive a container’s dimensions, fit, load, usable fill level or energy content. In particular, converting CCF to a volume does not convert natural-gas volume to therms.
Sources
- NIST Handbook 44, 2026 edition — Cubic foot of 1,728 cubic inches and US liquid gallon of 231 cubic inches, supporting exact rational volume conversions only.