18 ft³ ≈ 112.119 gal (Imperial; in US gallons: 18 ft³ = 134.649 US gal). To convert cubic feet to gallons, multiply by 6.2288355: 18 × 6.2288355 = 112.119.
How to convert cubic feet to gallons
gal = ft³ × 6.2288355
- 1 ft³ = 6.2288355 gal (and 1 gal = 0.16054365 ft³).
- Multiply the amount by the factor: 18 × 6.2288355 = 112.119.
- Answer: 18 ft³ ≈ 112.119 gal (rounded to 6 significant figures).
Cubic Feet to Gallons table
| Cubic Feet (ft³) | Gallons (gal) |
|---|---|
| 13 ft³ | 80.9749 gal |
| 14 ft³ | 87.2037 gal |
| 15 ft³ | 93.4325 gal |
| 16 ft³ | 99.6614 gal |
| 17 ft³ | 105.89 gal |
| 18 ft³ | 112.119 gal |
| 19 ft³ | 118.348 gal |
| 20 ft³ | 124.577 gal |
| 21 ft³ | 130.806 gal |
| 22 ft³ | 137.034 gal |
| 23 ft³ | 143.263 gal |
| ft³ | gal |
|---|---|
| 1 ft³ | 6.2288 gal |
| 5 ft³ | 31.1442 gal |
| 10 ft³ | 62.2884 gal |
| 50 ft³ | 311.442 gal |
| 100 ft³ | 622.884 gal |
| 1,000 ft³ | 6,228.84 gal |
Good to know
The gal here is the Imperial (UK) gallon: 1 gal = 4.54609 L. A US gallon is 3.78541 L.
In US gallons: 18 ft³ = 134.649 US gal.