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Cubic feet to US gallons (ft³ to gal (US))
Convert cubic feet to US gallons: 1 ft³ = 7.48052 gal (US). Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.
Formula
1 ft³ = 7.48052 gal (US)
US gallons = cubic feet × 7.480519481 — reverse: cubic feet = US gallons × 0.1336805556
The factor is derived from the SI definitions of both units (base unit: L) as listed in NIST SP 811; results on this page are shown to 6 significant figures, the API returns up to 12.
Worked examples
- 5 ft³ = 37.4026 gal (US)
- 12.5 ft³ = 93.5065 gal (US)
- 100 ft³ = 748.052 gal (US)
Cubic feet to US gallons conversion table
| Cubic feet (ft³) | US gallons (gal (US)) |
|---|---|
| 1 | 7.48052 |
| 2 | 14.961 |
| 3 | 22.4416 |
| 4 | 29.9221 |
| 5 | 37.4026 |
| 6 | 44.8831 |
| 7 | 52.3636 |
| 8 | 59.8442 |
| 9 | 67.3247 |
| 10 | 74.8052 |
| 15 | 112.208 |
| 20 | 149.61 |
| 25 | 187.013 |
| 30 | 224.416 |
| 40 | 299.221 |
| 50 | 374.026 |
| 75 | 561.039 |
| 100 | 748.052 |
| 200 | 1496.1 |
| 250 | 1870.13 |
| 500 | 3740.26 |
| 1000 | 7480.52 |
FAQ
How many US gallons are in one cubic foot?
1 ft³ = 7.48052 gal (US). The factor comes from the SI definitions of both units (NIST SP 811 / BIPM), so it is exact or correct to at least 10 significant figures.
What is the formula to convert cubic feet to US gallons?
Multiply the value in cubic feet by 7.480519481: US gallons = cubic feet × 7.480519481. For example, 5 ft³ = 37.4026 gal (US).
How do I convert US gallons back to cubic feet?
Multiply by the inverse factor 0.1336805556 (cubic feet = US gallons × 0.1336805556), or use the US gallons-to-cubic feet page.
Related conversions
Machine access
- API:
GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=ft3&to_unit=gal_us - MCP: server
https://tttkmbb.com/mcp, toolconvert_unitswith{"value":5,"from_unit":"ft3","to_unit":"gal_us"} - Markdown: https://tttkmbb.com/conversion/cubic-feet-to-gallons.md · JSON: https://tttkmbb.com/conversion/cubic-feet-to-gallons.json (add
?value=for a result) · Units: /api/v1/units?quantity=volume - OpenAPI operationId:
convert_units. Freshness:static. Authentication: none.