Imperial miles per gallon to US miles per gallon formula
US mpg = Imperial mpg × 0.83267418
Multiply Imperial MPG by approximately 0.83267418. MPG and L/100km are reciprocal measures: higher MPG is better, while lower L/100km is better. Use the mpg to imperial mpg converter for the reverse direction.
Imperial miles per gallon to US miles per gallon conversion table
Common imperial mpg to mpg values, rounded for reading. The converter above keeps full precision.
| Imperial miles per gallon | US miles per gallon |
|---|---|
| 3 imp mpg | 2.49802 US mpg |
| 4 imp mpg | 3.3307 US mpg |
| 5 imp mpg | 4.16337 US mpg |
| 6 imp mpg | 4.99605 US mpg |
| 7 imp mpg | 5.82872 US mpg |
| 8 imp mpg | 6.66139 US mpg |
| 10 imp mpg | 8.32674 US mpg |
| 15 imp mpg | 12.4901 US mpg |
| 20 imp mpg | 16.6535 US mpg |
| 25 imp mpg | 20.8169 US mpg |
| 30 imp mpg | 24.9802 US mpg |
| 35 imp mpg | 29.1436 US mpg |
| 40 imp mpg | 33.307 US mpg |
| 50 imp mpg | 41.6337 US mpg |
| 60 imp mpg | 49.9605 US mpg |
Worked example
To convert 8 imp mpg to us miles per gallon, apply the formula above: the result is 6.66139 US mpg. US and Imperial gallons are different. Higher MPG means better efficiency, while lower L/100km means better efficiency; zero cannot be converted with a reciprocal formula.
Frequently asked questions
How do you convert Imperial mile per gallon to US mile per gallon?
Multiply Imperial MPG by approximately 0.83267418. The formula is US mpg = Imperial mpg × 0.83267418.
What is 8 imp mpg in US mpg?
8 imp mpg equals 6.66139 US mpg. The converter rejects zero because reciprocal fuel-economy values would be infinite.
Are US MPG and Imperial MPG the same?
No. An Imperial gallon is larger than a US gallon, so the same vehicle has a higher Imperial MPG number. Choose the standard used by the vehicle specification.
Related fuel economy conversions
Need a different pair? Open the full fuel economy converter to choose any two units.