Cubic Feet to Gallons Converter
Type a value in cubic feet to see it in gallons 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
- 10 × 7.480519481 = 74.805195 gal
| 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 |
| 20 ft³ | 149.61 gal |
| 25 ft³ | 187.013 gal |
| 30 ft³ | 224.416 gal |
| 40 ft³ | 299.221 gal |
| 50 ft³ | 374.026 gal |
| 100 ft³ | 748.052 gal |
| 200 ft³ | 1,496.1 gal |
| 500 ft³ | 3,740.26 gal |
| 1,000 ft³ | 7,480.52 gal |
| 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 |
How to convert cubic feet to gallons
1 cubic foot = 7.480519481 gallons. To convert cubic feet to gallons, multiply by 7.480519481. A cubic foot is a 1 ft × 1 ft × 1 ft cube, about 28.317 L. A US liquid gallon is 231 cubic inches, exactly 3.785411784 L.
Worked examples
- 1 cubic foot = 7.48052 gal (1 × 7.4805195)
- 10 cubic feet = 74.8052 gal (10 × 7.4805195)
- 100 cubic feet = 748.052 gal (100 × 7.4805195)
Where this conversion comes up
Cubic feet are used for fridges, freezers, storage units and gas meters; gallons for gasoline, milk, paint and fish tanks in the US. A cubic foot holds 7.48 US gallons, which is how aquarium, hot-tub and pool volumes are worked out: a 4 ft × 2 ft × 2 ft tank is 16 ft³, about 120 gallons.
Quick estimate
Multiply by 7.5 (0.3% high).
Common mistakes
- Dividing instead of multiplying. A gallon is smaller than a cubic foot, so the number of gallons must come out larger: 1 cubic foot = 7.48052 gal.
- 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 7.48 to 7.5 first puts large values noticeably off.
Going the other way? Use the gallons to cubic feet 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 cubic feet to gallons?
Multiply the cubic feet by 7.480519481. For example, 10 cubic feet is 74.8052 gallons.
How many gallons are in one cubic foot?
One cubic foot is 7.480519481 gallons. A cubic foot is a 1 ft × 1 ft × 1 ft cube, about 28.317 L.
What is 100 cubic feet in gallons?
100 cubic feet is 748.052 gallons.
Is there a quick way to estimate cubic feet to gallons?
Multiply by 7.5 (0.3% high).