Cubic Feet to Gallons Converter
Updated Formulas shown
One cubic foot holds 7.48052 US gallons (28.32 L). 10 ft³ = 74.81 gal. Multiply length × width × depth in feet for cubic feet first.
Formula: gallons = cubic feet × 7.4805194805 (exact ratio, shown rounded)
Common values: cubic feet → gallons
| cubic feet | gallons |
|---|---|
| 7.48052 gal | |
| 14.961 gal | |
| 22.4416 gal | |
| 37.4026 gal | |
| 74.8052 gal | |
| 149.61 gal | |
| 187.013 gal | |
| 374.026 gal | |
| 748.052 gal | |
| 1,870.13 gal | |
| 3,740.26 gal | |
| 7,480.52 gal |
10 ft³ in every volume unit
- 283,168 mL
- 283.168 L
- 0.283168 m³
- 57,450.4 tsp
- 19,150.1 tbsp
- 9,575.06 fl oz
- 1,196.88 cup
- 1,179.87 cup (legal)
- 1,132.67 cup (metric)
- 598.442 pt
- 299.221 qt
- 74.8052 gal
- 17,280 in³
- 0.37037 yd³
- 62.2884 imp gal
- 9,966.14 imp fl oz
How to convert cubic feet to gallons
- Type the value in cubic feet into the converter (or into the right-hand box to go the other way).
- Multiply by 7.4805194805 to get gallons.
- Round to a sensible precision with the Decimals control; the table below covers the values people look up most.
Cubic foot to gallon formula
gallons = cubic feet × 7.4805194805 — 1 ft³ = 7.48051948 gal. Both units are defined exactly (NIST SP 811); the factor above is rounded to 10 decimals, and the converter uses the full-precision ratio.
ft³ to gal conversion table
| ft³ | US gallons | liters | water weight (lb) |
|---|---|---|---|
| 1 | 7.5 | 28 | 62 |
| 2 | 15 | 57 | 125 |
| 3 | 22.4 | 85 | 187 |
| 5 | 37.4 | 142 | 312 |
| 7.5 | 56.1 | 212 | 467 |
| 10 | 74.8 | 283 | 623 |
| 15 | 112.2 | 425 | 935 |
| 20 | 149.6 | 566 | 1,246 |
| 25 | 187 | 708 | 1,558 |
| 50 | 374 | 1,416 | 3,115 |
| 75 | 561 | 2,124 | 4,673 |
| 100 | 748.1 | 2,832 | 6,230 |
| 200 | 1,496.1 | 5,663 | 12,461 |
| 250 | 1,870.1 | 7,079 | 15,576 |
| 500 | 3,740.3 | 14,158 | 31,152 |
| 1,000 | 7,480.5 | 28,317 | 62,303 |
| 2,000 | 14,961 | 56,634 | 124,606 |
| 5,000 | 37,402.6 | 141,584 | 311,515 |
| 10,000 | 74,805.2 | 283,168 | 623,030 |
Water weight at about 20 °C (0.998 kg/L) ≈ 62.3 lb/ft³; 62.4 lb/ft³ is the usual rounded value.
Ponds, tubs and tanks
An 8 × 6 ft garden pond averaging 2 ft deep is 96 ft³, or 718 gallons — and over 5,900 lb of water. A 5 × 2.5 ft bathtub filled 1.25 ft deep holds 15.6 ft³ (117 gal, about 975 lb with no one in it), which is why tub floors need properly sized joists. For round or irregular shapes use the pool volume calculator.
Related converters & calculators
- Gallons to Liters ConverterMultiply by 3.78541 (US gallon).
- Pool Volume CalculatorCalculate pool gallons for rectangle, round, oval and kidney pools from length, width and shallow/deep depth, plus liters and chlorine dosing.
- Cubic Feet CalculatorCalculate cubic feet from length, width and height in feet, inches, yards, meters or centimeters, plus yd³, m³, gallons and liters.
- Aquarium Volume CalculatorCalculate fish tank volume in gallons and liters from length, width and height in inches, plus water weight.
- mL to Ounces ConverterDivide by 29.5735 (US fl oz).
- Ounces to mL ConverterMultiply by 29.5735.
- Cups to mL Converter1 US cup = 236.6 mL.
- Liters to Gallons ConverterDivide by 3.78541.
Frequently asked questions
How many gallons in a cubic foot?
7.48052 US gallons (6.229 imperial gallons).
How many gallons is 100 cubic feet?
748.05 US gallons.
How much does a cubic foot of water weigh?
About 62.4 lb (28.3 kg).
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Estimates only. Check quantities with your supplier or contractor before ordering.