Miles Per Imperial Gallon to Miles Per US Gallon Converter
Convert miles per Imperial gallon to miles per US gallon instantly with this free miles per Imperial gallon to miles per US gallon converter. Enter any value to get an accurate fuel economy conversion, plus the formula, the conversion factor and a full reference table.
What is 1 mile per Imperial gallon in miles per US gallon?
1 mile per Imperial gallon is equal to 0.832674185 miles per US gallon.
1 ÷ 1.20094993 = 0.832674185 miles per US gallon
1 mile per Imperial gallon = 0.8326741847 miles per US gallon
Miles per Imperial gallon to Miles per US gallon formula
MPG (US) = MPG (imp) ÷ 1.20094993
The miles per Imperial gallon to miles per US gallon conversion factor is 0.832674184651 (rounded). 1 mile per Imperial gallon = 0.832674184651 miles per US gallon, and 1 mile per US gallon = 1.20094992547 miles per Imperial gallon.
Regional note. US MPG and Imperial MPG are not interchangeable because the Imperial gallon is larger. 30 Imperial MPG is about 25 US MPG. This page uses miles per US gallon.
Worked examples
- 8 miles per Imperial gallon = 6.66139348 miles per US gallon — 8 ÷ 1.20094993 = 6.66139348 miles per US gallon
- 25 miles per Imperial gallon = 20.8168546 miles per US gallon — 25 ÷ 1.20094993 = 20.8168546 miles per US gallon
- 45 miles per Imperial gallon = 37.4703383 miles per US gallon — 45 ÷ 1.20094993 = 37.4703383 miles per US gallon
Miles per Imperial gallon to Miles per US gallon conversion table
Every value below is calculated with the exact conversion factor and rounded for display.
| Miles per Imperial gallon (MPG (imp)) | Miles per US gallon (MPG (US)) |
|---|---|
| 5 MPG (imp) | 4.1633709 MPG (US) |
| 8 MPG (imp) | 6.6613935 MPG (US) |
| 10 MPG (imp) | 8.3267418 MPG (US) |
| 15 MPG (imp) | 12.490113 MPG (US) |
| 20 MPG (imp) | 16.653484 MPG (US) |
| 25 MPG (imp) | 20.816855 MPG (US) |
| 30 MPG (imp) | 24.980226 MPG (US) |
| 35 MPG (imp) | 29.143596 MPG (US) |
| 40 MPG (imp) | 33.306967 MPG (US) |
| 45 MPG (imp) | 37.470338 MPG (US) |
| 50 MPG (imp) | 41.633709 MPG (US) |
| 60 MPG (imp) | 49.960451 MPG (US) |
When you need to convert miles per Imperial gallon to miles per US gallon
- Comparing a car's efficiency between US MPG, Imperial MPG and litres per 100 km.
- Estimating fuel cost for a trip in another country.
Common mistakes to avoid
- Dividing when you should multiply. Because 1 mile per Imperial gallon = 0.832674 miles per US gallon, the answer should be smaller than the number you started with.
- Averaging fuel economy figures directly. MPG is an inverse measure, so the average of two MPG figures is not the fuel economy of the two trips combined.
- Rounding too early. Convert first at full precision, then round the final answer to the precision the task actually needs.
How precise does the answer need to be?
Round only at the end, and only to the precision your task actually needs. The converter above keeps full double precision internally and rounds for display.
How these units are defined
- Mile per Imperial gallon (MPG (imp)): The UK fuel-economy rating: miles per Imperial gallon (about 20% larger than US MPG). The accepted value is a measured or conventional figure rather than an exact definition, so the factor shown is rounded.
- Mile per US gallon (MPG (US)): The US fuel-economy rating: miles per US gallon. The accepted value is a measured or conventional figure rather than an exact definition, so the factor shown is rounded.
Related conversions
- Miles per US gallon to Miles per Imperial gallon
- Miles per Imperial gallon to Kilometers per liter
- Miles per Imperial gallon to Liters per 100 kilometers
- Kilometers per liter to Miles per Imperial gallon
- Liters per 100 kilometers to Miles per Imperial gallon
- Miles per US gallon to Kilometers per liter
- Miles per US gallon to Liters per 100 kilometers
Frequently asked questions
- What is 1 mile per Imperial gallon in miles per US gallon?
- 1 mile per Imperial gallon is equal to 0.832674185 miles per US gallon.
- How many miles per Imperial gallon are in one mile per US gallon?
- There are 1.20094993 miles per Imperial gallon in 1 mile per US gallon.
- How do you convert miles per Imperial gallon to miles per US gallon?
- Multiply the number of miles per Imperial gallon by 0.832674185 — or use the formula MPG (US) = MPG (imp) ÷ 1.20094993.
- What is 25 miles per Imperial gallon in miles per US gallon?
- 25 miles per Imperial gallon is 20.8168546 miles per US gallon. 25 ÷ 1.20094993 = 20.8168546 miles per US gallon.
- Is the miles per Imperial gallon to miles per US gallon conversion exact?
- The factor 0.832674184651 is a rounded value because at least one of these units is defined by measurement rather than by an exact definition.
- Does this use US or Imperial miles per US gallon?
- US MPG and Imperial MPG are not interchangeable because the Imperial gallon is larger. 30 Imperial MPG is about 25 US MPG. This page uses miles per US gallon.