Convert US Gallon to Imperial Gallon
Use this free converter to change us gallons (gal) into imperial gallons (imp gal). Us gallon and imperial gallon both measure volume. As a quick reference, 1 gal equals 0.83267418 imp gal, and 1 imp gal equals 1.2009499 gal.
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Imperial Gallon (imp gal)
0.83267418
1 gal = 0.83267418 imp gal
Volume conversion table
| US Gallon | Imperial Gallon |
|---|---|
| 0.01 | 0.0083267418 |
| 0.1 | 0.083267418 |
| 0.5 | 0.41633709 |
| 1 | 0.83267418 |
| 2 | 1.6653484 |
| 3 | 2.4980226 |
| 5 | 4.1633709 |
| 10 | 8.3267418 |
| 20 | 16.653484 |
| 25 | 20.816855 |
| 50 | 41.633709 |
| 100 | 83.267418 |
| 1,000 | 832.67418 |
How to convert US Gallon to Imperial Gallon
Multiply the us gallon value by 0.83267418 to get imperial gallons.
- Enter the number of us gallons you want to convert.
- The converter instantly shows the equivalent value in imperial gallons.
- Worked example: 15 gal × 0.83267418 = 12.490113 imp gal.
- Use the swap button to reverse the conversion (imperial gallon to us gallon).
About these units
US Gallon (gal)
- Definition
- A US gallon (gal) is a unit of volume equal to 3.785411784 liters, or 128 US fluid ounces.
- History
- It is based on the old English wine gallon of 231 cubic inches, adopted by the United States.
- Current use
- US gallons measure fuel, milk, and paint in the United States.
Imperial Gallon (imp gal)
- Definition
- An imperial gallon (imp gal) equals about 4.546 liters, roughly 20% larger than the US gallon.
- History
- It was defined in the UK in 1824 as the volume of ten pounds of water at a set temperature.
- Current use
- Imperial gallons are still used in the UK and some Commonwealth countries, often for fuel economy.
Frequently asked questions
How many imperial gallons are in a us gallon?
There are 0.83267418 imp gal in 1 gal. To convert, multiply the number of us gallons by 0.83267418.
How do I convert us gallons to imperial gallons?
Multiply the us gallon value by 0.83267418 to get imperial gallons. For example, 10 gal = 8.3267418 imp gal.
Is this us gallon-to-imperial gallon converter free?
Yes. This converter is completely free, runs entirely in your browser, and requires no sign-up. Your inputs never leave your device.
Convert US Gallon to other volume units
| Unit | 1 US Gallon equals |
|---|---|
| Liter (L) | 3.7854118 L |
| Milliliter (mL) | 3785.4118 mL |
| Cubic Meter (m³) | 0.0037854118 m³ |
| Cubic Centimeter (cm³) | 3785.4118 cm³ |
| Imperial Gallon (imp gal) | 0.83267418 imp gal |
| US Quart (qt) | 4 qt |
| US Pint (pt) | 8 pt |
| US Cup (cup) | 16 cup |
| US Fluid Ounce (fl oz) | 128 fl oz |
| Tablespoon (tbsp) | 256 tbsp |
| Teaspoon (tsp) | 768 tsp |