UK gallons to US gallons
Type a value in UK gallons and get the result in US gallons, calculated exactly.
10 UK gallons ≈ 12.00949926 US gallons
Precision
Exact factorRounded for display to about 10 significant digits.
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Formula
gal (US) = gal (UK) × 1.2009499255
To convert UK gallons to US gallons, multiply the value by 1.2009499255.
Worked examples
- 1 gal (UK) × 1.2009499255 ≈ 1.200949926 gal (US)
- 10 gal (UK) × 1.2009499255 ≈ 12.00949926 gal (US)
- 100 gal (UK) × 1.2009499255 ≈ 120.0949926 gal (US)
This factor is exact by definition.
Conversion table
| UK gallons (gal (UK)) | US gallons (gal (US)) |
|---|---|
| 1 | ≈ 1.20095 |
| 2 | ≈ 2.4019 |
| 3 | ≈ 3.60285 |
| 4 | ≈ 4.8038 |
| 5 | ≈ 6.00475 |
| 6 | ≈ 7.2057 |
| 7 | ≈ 8.406649 |
| 8 | ≈ 9.607599 |
| 9 | ≈ 10.80855 |
| 10 | ≈ 12.0095 |
| 15 | ≈ 18.01425 |
| 20 | ≈ 24.019 |
| 25 | ≈ 30.02375 |
| 30 | ≈ 36.0285 |
| 40 | ≈ 48.038 |
| 50 | ≈ 60.0475 |
| 60 | ≈ 72.057 |
| 70 | ≈ 84.06649 |
| 75 | ≈ 90.07124 |
| 80 | ≈ 96.07599 |
| 90 | ≈ 108.0855 |
| 100 | ≈ 120.095 |
Values marked ≈ are rounded; the rest are exact.
Reverse table: US gallons to UK gallons
| US gallons (gal (US)) | UK gallons (gal (UK)) |
|---|---|
| 1 | ≈ 0.8326742 |
| 2 | ≈ 1.665348 |
| 3 | ≈ 2.498023 |
| 4 | ≈ 3.330697 |
| 5 | ≈ 4.163371 |
| 6 | ≈ 4.996045 |
| 7 | ≈ 5.828719 |
| 8 | ≈ 6.661393 |
| 9 | ≈ 7.494068 |
| 10 | ≈ 8.326742 |
| 15 | ≈ 12.49011 |
| 20 | ≈ 16.65348 |
| 25 | ≈ 20.81685 |
| 30 | ≈ 24.98023 |
| 40 | ≈ 33.30697 |
| 50 | ≈ 41.63371 |
| 60 | ≈ 49.96045 |
| 70 | ≈ 58.28719 |
| 75 | ≈ 62.45056 |
| 80 | ≈ 66.61393 |
| 90 | ≈ 74.94068 |
| 100 | ≈ 83.26742 |
Unit definitions
- UK gallons gal (UK)
- The imperial gallon: exactly 4.54609 litres.
- US gallons gal (US)
- Exactly 231 cubic inches, or 3.785411784 litres.
Questions people ask
UK gallons to US gallons: what is the conversion factor?
One gal (UK) is ≈ 1.200949926 gal (US).
How do I convert UK gallons to US gallons?
Use the formula above. For example, 10 gal (UK) = ≈ 12.00949926 gal (US).
Is the conversion exact?
Yes. Both units have exact definitions, so the factor is exact; a result is only rounded when its decimals never end.
Factors checked 19 October 2026.