US gallon to Imperial gallon Converter
Type a value — the answer appears instantly. 1 gal = 0.832674 gal (UK).
Reviewed by the OmniCalc teamMethod verified 2026-07-01
0.832674 imperial gallons
= 3.78541 L= 3,785.41 ml
equals 0.832674 imperial gallonsFormula: gal (UK) = gal × 0.83267418
US gallon to Imperial gallon formula
gal (UK) = gal × 0.83267418
Convert 5 US gallons to imperial gallons
- Start with 5 US gallons.
- Multiply by the conversion factor: 5 × 0.832674 = 4.16337.
- So 5 gal = 4.16337 gal (UK).
US gallon to Imperial gallon conversion table
| US gallons (gal) | Imperial gallons (gal (UK)) |
|---|---|
| 0.01 gal | 0.00832674 gal (UK) |
| 0.1 gal | 0.0832674 gal (UK) |
| 0.25 gal | 0.208169 gal (UK) |
| 0.5 gal | 0.416337 gal (UK) |
| 1 gal | 0.832674 gal (UK) |
| 2 gal | 1.66535 gal (UK) |
| 3 gal | 2.49802 gal (UK) |
| 4 gal | 3.3307 gal (UK) |
| 5 gal | 4.16337 gal (UK) |
| 6 gal | 4.99605 gal (UK) |
| 7 gal | 5.82872 gal (UK) |
| 8 gal | 6.66139 gal (UK) |
| 9 gal | 7.49407 gal (UK) |
| 10 gal | 8.32674 gal (UK) |
| 15 gal | 12.4901 gal (UK) |
| 20 gal | 16.6535 gal (UK) |
| 25 gal | 20.8169 gal (UK) |
| 30 gal | 24.9802 gal (UK) |
| 40 gal | 33.307 gal (UK) |
| 50 gal | 41.6337 gal (UK) |
| 75 gal | 62.4506 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) |
| 5,000 gal | 4,163.37 gal (UK) |
| 10,000 gal | 8,326.74 gal (UK) |
Unit definitions
What is a US gallon?
The US gallon is defined as exactly 231 cubic inches, or 3.785411784 litres. It is the standard unit for fuel, milk, and large liquid quantities in the United States. It is about 20% smaller than the imperial gallon.
What is a imperial gallon?
The imperial (UK) gallon is defined as exactly 4.54609 litres. It is used for fuel economy and liquid volumes in the United Kingdom and some Commonwealth countries. It is larger than the US gallon.
Frequently asked questions
How many imperial gallons are in one US gallon?
One US gallon equals 0.832674 imperial gallons (1 gal = 0.832674 gal (UK)).
How do I convert US gallons to imperial gallons?
Multiply the value in US gallons by 0.832674. For example, 10 gal × 0.832674 = 8.32674 gal (UK).
Which is bigger — a US gallon or a imperial gallon?
A imperial gallon is bigger: one imperial gallon contains 1.20095 US gallons.
Is this US gallon to imperial gallon converter free?
Yes — the converter is free, works offline once loaded, and computes instantly in your browser without sending your numbers to a server.
Conversion factors follow international definitions (SI / NIST). Last verified 2026-07-01.