Us Gallons to Uk Gallons
A US gallon is 3.785 liters, the standard unit for fuel and milk sold by volume in the US. An imperial (UK) gallon is 4.546 liters, about 20% larger than the US gallon, still used for fuel economy in the UK. 1 gal equals ≈0.832674 gal UK, so converting between them is a matter of multiplying by that fixed factor — type any value into the converter below and both sides update instantly as you type.
Both units belong to volume, measured here against volume's base unit (L) — every other volume unit on this site converts through that same reference point, which is why the table below can also be read as a quick cross-check against nearby values.
Formula
gal UK = gal × ≈0.832674
gal = gal UK × ≈1.20095
Worked example: 5 gal × ≈0.832674 = ≈4.16337 gal UK.
Conversion table
| Gallon (US) (gal) | Gallon (UK) (gal UK) |
|---|---|
| 1 gal | ≈0.832674 gal UK |
| 2 gal | ≈1.66535 gal UK |
| 3 gal | ≈2.49802 gal UK |
| 5 gal | ≈4.16337 gal UK |
| 10 gal | ≈8.32674 gal UK |
| 20 gal | ≈16.6535 gal UK |
| 25 gal | ≈20.8169 gal UK |
| 50 gal | ≈41.6337 gal UK |
| 100 gal | ≈83.2674 gal UK |
| 250 gal | ≈208.169 gal UK |
| 500 gal | ≈416.337 gal UK |
| 1,000 gal | ≈832.674 gal UK |
Frequently asked
- How many Gallons (UK) in a gallon (us)?
- 1 gal equals ≈0.832674 gal UK.
- How do I convert Gallons (US) to Gallons (UK)?
- Multiply the value in gal by ≈0.832674 to get gal UK. The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — Gallon (US) and Gallon (UK) are both defined by a fixed conversion factor to volume's base unit (L), so the result shown is exact to the precision displayed, not an approximation.