Cubic Feet to Gallons Converter
Convert cubic feet to US gallons — 7.48 gallons to the cubic foot. Results update as you type; exact factors shown.
One cubic foot is 7.4805 US gallons — see the exact factor, not a rounded rule of thumb.
How the cubic feet to gallons converter works
Volumes convert through the liter (exactly 1 dm³). The US gallon is exactly 3.785411784 L (231 cubic inches); the imperial gallon is exactly 4.54609 L. A US fluid ounce is 29.5735 mL, an imperial fluid ounce 28.4131 mL; a US pint is 16 US fl oz, an imperial pint 20 imperial fl oz.
The US uses customary units (US gallon, short ton, °F) in daily life; NIST SP 811 gives the exact SI factors.
Common volume conversions
| From | To | Units |
|---|---|---|
| 0.5 ft³ | 3.7403 US gal | cubic feet to US gallons |
| 1 ft³ | 7.4805 US gal | cubic foot to US gallons |
| 2 ft³ | 14.961 US gal | cubic feet to US gallons |
| 5 ft³ | 37.4026 US gal | cubic feet to US gallons |
| 10 ft³ | 74.8052 US gal | cubic feet to US gallons |
| 20 ft³ | 149.6104 US gal | cubic feet to US gallons |
| 50 ft³ | 374.026 US gal | cubic feet to US gallons |
| 100 ft³ | 748.0519 US gal | cubic feet to US gallons |
| 200 ft³ | 1,496.1039 US gal | cubic feet to US gallons |
| 500 ft³ | 3,740.2597 US gal | cubic feet to US gallons |
| 1,000 ft³ | 7,480.5195 US gal | cubic feet to US gallons |
| 5,000 ft³ | 37,402.5974 US gal | cubic feet to US gallons |
Units in this converter and their exact factors
| Unit | Symbol | One unit in liters |
|---|---|---|
| milliliter | mL | 0.001 liter |
| liter | L | 1 liter |
| cubic meter | m³ | 1,000 liter |
| teaspoon (metric) | tsp | 0.005 liter |
| tablespoon (metric) | tbsp | 0.015 liter |
| cup (metric) | cup | 0.25 liter |
| US fluid ounce | US fl oz | 0.0295735296 liter |
| US cup | US cup | 0.2365882365 liter |
| US pint | US pt | 0.473176473 liter |
| US gallon | US gal | 3.785411784 liter |
| imperial fluid ounce | imp fl oz | 0.0284130625 liter |
| imperial pint | imp pt | 0.56826125 liter |
| imperial gallon | imp gal | 4.54609 liter |
| cubic foot | ft³ | 28.316846592 liter |
FAQFrequently asked questions about volume conversion
How many gallons in a cubic foot?
7.481 US gallons, or 6.229 imperial.
What is 100 cubic feet in gallons?
748.1 US gallons.
Why is this used?
Water meters and gas meters often register in cubic feet while bills quote gallons or therms.
What is a cubic foot in liters?
28.317 L.
What is 1,000 cubic feet?
7,481 US gallons — a common billing unit written as MCF for gas.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Institute of Standards and Technology (NIST) — United States's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.