📏 US gallons to Imperial gallons Converter
Convert us gallons (gal) to imperial gallons (imp gal) instantly, with the formula, a worked example and a conversion table.
Quick answer: 1 us gallon (gal) = 0.83267418 imperial gallons (imp gal). Formula: imp gal = gal × 0.83267418.
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US gallons to Imperial gallons Converter inputs
Result
1 gal =
0.83267418 imp gal
imp gal = gal × 0.83267418
1 us gallon = 0.83267418 imp gal · imp gal to gal
US gallons to Imperial gallons conversion table
| US gallons (gal) | Imperial gallons (imp gal) |
|---|---|
| 0.1 gal | 0.083267418 imp gal |
| 0.5 gal | 0.41633709 imp gal |
| 1 gal | 0.83267418 imp gal |
| 2 gal | 1.6653484 imp gal |
| 3 gal | 2.4980226 imp gal |
| 5 gal | 4.1633709 imp gal |
| 10 gal | 8.3267418 imp gal |
| 20 gal | 16.653484 imp gal |
| 25 gal | 20.816855 imp gal |
| 50 gal | 41.633709 imp gal |
| 100 gal | 83.267418 imp gal |
| 1,000 gal | 832.67418 imp gal |
Other volume conversions
gal to mLgal to Lgal to m³gal to tspgal to tbspgal to fl ozgal to cupgal to ptgal to qtgal to imp gal
How to convert us gallons to imperial gallons
Multiply the number of us gallons by 0.83267418 to get imperial gallons: imp gal = gal × 0.83267418.
Example: 5 gal = 4.1633709 imp gal.
The us gallon (gal) and the imperial gallon (imp gal) are both units of volume. Need the opposite direction? Use the imp gal to gal converter.
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Metric and imperial units
The metric system (SI) is used by almost every country and by science worldwide. Its units scale by powers of ten – 1 kilometer is 1,000 meters, 1 meter is 100 centimeters – which makes conversions inside the system easy. The imperial and US customary systems (inches, feet, pounds, gallons) are still used daily in the United States and partly in the UK.
Since 1959 the inch has been defined as exactly 2.54 centimeters and the pound as exactly 0.45359237 kilograms, so conversions between the two systems are exact. Note that a US gallon (3.785 L) and an imperial gallon (4.546 L) are different – choose the right one above.
This converter covers 10 categories and 66 units: length, weight, temperature, volume, area, speed, time, data, energy, pressure.
Frequently asked questions
How many imperial gallons are in a us gallon?
1 us gallon = 0.83267418 imperial gallons.
How do I convert us gallons to imperial gallons?
Use the formula imp gal = gal × 0.83267418. For example, 5 gal = 4.1633709 imp gal.
How do I convert imperial gallons back to us gallons?
1 imperial gallon = 1.2009499 us gallons. Use the imp gal to gal converter linked on this page.
Are these conversions exact?
Yes – all factors use the internationally defined values (for example 1 inch = 2.54 cm exactly, 1 pound = 0.45359237 kg exactly). Results are rounded to 8 significant digits for display.