How US to Imperial Gallon Converter Works?
This tool works by multiplying US gallons by 0.832674. The result is the same volume in UK imperial gallons.
Enter US gallons
Type the volume in US gallons, for example 15 US gallons.
Apply the ratio
The tool multiplies by 0.832674, the ratio of US to imperial gallon size.
Read imperial gallons
The tool returns the volume in imperial gallons.
Check in liters
Multiply US gallons by 3.785 for liters if a metric figure helps.
US to Imperial Gallon Converter Formula
The formula is Imperial Gallons = US Gallons × 0.832674.
Imperial Gallons = US Gallons × 0.832674Formula variables
- US Gallons
- Volume in US gallons (3.785 L each).
- 0.832674
- US gallon (3.785 L) ÷ imperial gallon (4.546 L).
Worked example
- US Gallons: 15 US gal
- Multiply 15 by 0.832674: 15 × 0.832674 = 12.49 imperial gallons (56.8 L).
Result: 12.49 (Imp. Gallons)
An imperial gallon holds about 20% more than a US gallon. Divide imperial gallons by 0.832674 to convert back to US gallons.
US to Imperial Gallon Converter Conversion Table
The table lists imperial gallon equivalents for 6 US gallon amounts.
| US Gallons (US gal) | Result (Imp. Gallons) |
|---|---|
| 1 US gal | 0.83 |
| 5 US gal | 4.16 |
| 10 US gal | 8.33 |
| 15 US gal | 12.49 |
| 20 US gal | 16.65 |
| 25 US gal | 20.82 |
A 25-US-gallon (94.6 L) truck tank holds 20.82 imperial gallons.
What is US to Imperial Gallon Converter?
The US to Imperial Gallon Converter is a tool that converts volume from US gallons to UK imperial gallons. The tool resolves confusion between the 2 gallon sizes.
The US gallon equals 3.785 liters and comes from an old British wine gallon. The imperial gallon equals 4.546 liters and became the UK standard in 1824.
Fuel tank sizes, MPG ratings, and fuel quantities in older UK and Canadian sources use imperial gallons.
What are the uses of US to Imperial Gallon Converter?
There are 4 main uses of the US to Imperial Gallon Converter: comparing tank sizes, reading UK and Canadian specs, converting boat and RV tanks, and checking older manuals.
Comparing tank sizes
Buyers compare US and UK tank capacities on one scale.
Reading UK and Canadian specs
Readers convert imperial figures into US units.
Converting boat and RV tanks
Owners convert tank capacities on imported boats and RVs.
Checking older manuals
Owners of classic British cars convert service figures.
Need every metric in one place? Open the main MPG Cost Calculator or browse all 101 fuel calculators.