Gallons to UK Gallons Converter
Convert US gallons to UK gallons instantly. One US gallon equals exactly 0.8326742 UK gallons. Type in either box to convert both ways, then use the chart, worked examples and everyday sizes below.
How to convert US gallons to UK gallons
Worked example: convert 64 US gallons to UK gallons. Using UK gallons ← US gallons × 0.8326741846, we get 64 × 0.8326741846 = 53.291148 imp gal. To check the result, convert back: 53.291148 imp gal ÷ 0.8326741846 = 64 gal.
Us gallons to UK gallons chart
| Us gallons (gal) | Uk gallons (imp gal) |
|---|---|
| 1 gal | 0.8326742 imp gal |
| 2 gal | 1.665348 imp gal |
| 3 gal | 2.498023 imp gal |
| 4 gal | 3.330697 imp gal |
| 5 gal | 4.163371 imp gal |
| 6 gal | 4.996045 imp gal |
| 8 gal | 6.661393 imp gal |
| 10 gal | 8.326742 imp gal |
| 12 gal | 9.99209 imp gal |
| 15 gal | 12.49011 imp gal |
| 20 gal | 16.65348 imp gal |
| 25 gal | 20.81685 imp gal |
| 30 gal | 24.98023 imp gal |
| 40 gal | 33.30697 imp gal |
| 50 gal | 41.63371 imp gal |
| 75 gal | 62.45056 imp gal |
| 100 gal | 83.26742 imp gal |
| 150 gal | 124.9011 imp gal |
| 200 gal | 166.5348 imp gal |
| 250 gal | 208.1685 imp gal |
| 500 gal | 416.3371 imp gal |
| 1,000 gal | 832.6742 imp gal |
Uk gallons to US gallons (reverse)
| Uk gallons (imp gal) | Us gallons (gal) |
|---|---|
| 1 imp gal | 1.20095 gal |
| 2 imp gal | 2.4019 gal |
| 5 imp gal | 6.00475 gal |
| 10 imp gal | 12.0095 gal |
| 20 imp gal | 24.019 gal |
| 50 imp gal | 60.0475 gal |
| 100 imp gal | 120.095 gal |
| 250 imp gal | 300.2375 gal |
| 500 imp gal | 600.475 gal |
| 1,000 imp gal | 1,200.95 gal |
About the US gallon and the UK gallon
The US liquid gallon divides into 4 quarts, 8 pints or 16 cups. It is the unit on US fuel pumps and for milk jugs; the UK imperial gallon is about 20% larger.
The imperial gallon was used across the British Empire and still sits behind UK fuel economy figures in miles per gallon, even though fuel is sold by the liter.
One UK gallon equals 1.20095 US gallons, which makes the UK gallon the larger unit of the two.
Everyday sizes in US gallons and UK gallons
| Everyday example (approximate) | In US gallons | In UK gallons |
|---|---|---|
| A large water bottle | 0.26417 gal | 0.21997 imp gal |
| A 2-liter soft drink bottle | 0.52834 gal | 0.43994 imp gal |
| A bucket | 2.6417 gal | 2.1997 imp gal |
| A car fuel tank | 13.209 gal | 10.998 imp gal |
| A bathtub filled for a bath | 39.626 gal | 32.995 imp gal |
| A hot-water cylinder | 52.834 gal | 43.994 imp gal |
Us gallons to UK gallons FAQ
How many UK gallons are in one US gallon?
One US gallon equals exactly 0.8326741846 UK gallons. In the other direction, one UK gallon equals 1.2009499 US gallons.
How do I convert US gallons to UK gallons without a calculator?
convert 64 US gallons to UK gallons. Using UK gallons ← US gallons × 0.8326741846, we get 64 × 0.8326741846 = 53.291148 imp gal. To check the result, convert back: 53.291148 imp gal ÷ 0.8326741846 = 64 gal. For a quick estimate, round the factor to 0.83. Then 64 gal is about 53.12 imp gal, compared with the exact 53.2911 imp gal (an error of 0.32%). That is close enough for planning, but use the calculator above when the number matters.
What is a bathtub filled for a bath in UK gallons?
A bathtub filled for a bath is about 39.626 US gallons, which is 32.995 UK gallons. Treat that as an approximate everyday figure rather than an official measurement.
Are the US gallons and UK gallons the same in every country?
The US gallon is exactly 3.785411784 L and the UK imperial gallon is 4.54609 L. The imperial gallon is exactly 4.54609 L; the US gallon is smaller at 3.785 L.