Volume
gal (UK)togal (US)
Convert imperial gallons (gal (UK)) to US gallons (gal (US)).
Factor1 gal (UK) = 1.20095 gal (US)
Converter
gal (UK)
Accepts numbers or expressions, e.g. 150 + 14.7
Result
gal (US)
Rendered to 6 significant figures.
Formula
Formula
gal (US) = gal (UK) × 1.20095
Multiply any value in imperial gallons by 1.20095 to obtain the value in US gallons.
Worked example
Convert 100 gal (UK) to gal (US).
- 01Start with 100 gal (UK).
- 02Multiply by the conversion factor: 100 × 1.20095 = 120.095 gal (US).
Result100 gal (UK) = 120.095 gal (US)
Conversion table
| gal (UK) | gal (US) |
|---|---|
| 1 | 1.2009 |
| 2 | 2.4019 |
| 5 | 6.0047 |
| 10 | 12.009 |
| 20 | 24.019 |
| 50 | 60.047 |
| 100 | 120.09 |
| 200 | 240.19 |
| 500 | 600.47 |
| 1000 | 1200.9 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from gal (UK) to gal (US)?
1 gal (UK) equals 1.20095 gal (US). To convert, multiply the value in imperial gallons by 1.20095.
How do I convert 1 gal (UK) to gal (US)?
1 gal (UK) = 1.20095 gal (US). For any value, multiply by 1.20095.
How do I convert gal (US) back to gal (UK)?
Divide by the same factor — or equivalently, multiply by 0.8326742. So 1 gal (US) = 0.832674 gal (UK).
When would I need to convert imperial gallon to US gallon?
Volume conversions are used for tank sizing, batch calculations, and bridging between vendor specs (gallons, barrels, ft³) and process documentation (m³, litres).
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).