Gallons to Cubic Feet Converter
Type a value in gallons to see it in cubic feet as you type, with the exact formula and a reference chart.
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How this was calculated
- 1 cubic foot = 7.480519481 gallons
- 500 ÷ 7.480519481 = 66.840278 ft³
| gal | ft³ |
|---|---|
| 1 gal | 0.133681 ft³ |
| 5 gal | 0.668403 ft³ |
| 10 gal | 1.33681 ft³ |
| 20 gal | 2.67361 ft³ |
| 30 gal | 4.01042 ft³ |
| 40 gal | 5.34722 ft³ |
| 50 gal | 6.68403 ft³ |
| 55 gal | 7.35243 ft³ |
| 75 gal | 10.026 ft³ |
| 100 gal | 13.3681 ft³ |
| 150 gal | 20.0521 ft³ |
| 200 gal | 26.7361 ft³ |
| 250 gal | 33.4201 ft³ |
| 300 gal | 40.1042 ft³ |
| 500 gal | 66.8403 ft³ |
| 1,000 gal | 133.681 ft³ |
| 5,000 gal | 668.403 ft³ |
| 10,000 gal | 1,336.81 ft³ |
| ft³ | gal |
|---|---|
| 0.5 ft³ | 3.74026 gal |
| 1 ft³ | 7.48052 gal |
| 1.5 ft³ | 11.2208 gal |
| 2 ft³ | 14.961 gal |
| 3 ft³ | 22.4416 gal |
| 4 ft³ | 29.9221 gal |
| 5 ft³ | 37.4026 gal |
| 6 ft³ | 44.8831 gal |
| 8 ft³ | 59.8442 gal |
| 10 ft³ | 74.8052 gal |
| 12 ft³ | 89.7662 gal |
| 15 ft³ | 112.208 gal |
How to convert gallons to cubic feet
1 gallon = 0.1336805556 cubic feet. To convert gallons to cubic feet, divide by 7.480519481 (or multiply by 0.1336805556). A US liquid gallon is 231 cubic inches, exactly 3.785411784 L. A cubic foot is a 1 ft × 1 ft × 1 ft cube, about 28.317 L.
Worked examples
- 50 gallons = 6.68403 ft³ (50 ÷ 7.4805195)
- 500 gallons = 66.8403 ft³ (500 ÷ 7.4805195)
- 10,000 gallons = 1,336.81 ft³ (10,000 ÷ 7.4805195)
Where this conversion comes up
Gallons are used for gasoline, milk, paint and fish tanks in the US; cubic feet for fridges, freezers, storage units and gas meters. Divide by 7.48: a 55-gallon drum is 7.35 ft³ and a 10,000-gallon pool is 1,337 ft³. Water bills sometimes list usage in CCF (100 ft³ = 748 gallons).
Quick estimate
Divide by 7.5 (0.3% low).
Common mistakes
- Multiplying instead of dividing. A cubic foot is larger than a gallon, so the number of cubic feet must come out smaller: 50 gallons = 6.68403 ft³.
- Using the imperial (UK) unit. This page uses US measures. An imperial gallon is 4.546 L (20% more than a US gallon), an imperial pint 568 ml and an imperial fluid ounce 28.41 ml.
- Rounding too early. Keep the full factor until the last step; rounding 0.134 to 0.13 first puts large values noticeably off.
Going the other way? Use the cubic feet to gallons converter. Related volume converters: ml to oz, oz to ml, liters to gallons, gallons to liters, liters to quarts, quarts to liters.
Frequently asked questions
How do you convert gallons to cubic feet?
Multiply the gallons by 0.1336805556 (or divide by 7.480519481). For example, 500 gallons is 66.8403 cubic feet.
How many cubic feet are in one gallon?
One gallon is 0.1336805556 cubic feet. A US liquid gallon is 231 cubic inches, exactly 3.785411784 L.
What is 10,000 gallons in cubic feet?
10,000 gallons is 1,336.81 cubic feet.
Is there a quick way to estimate gallons to cubic feet?
Divide by 7.5 (0.3% low).