Miles per US Gallon to Miles per Imperial Gallon
Free instant miles per us gallon to miles per imperial gallon converter. 1 mpg = 1.20095 mpg.
Common Miles per US Gallon to Miles per Imperial Gallon values
| Miles per US Gallon (mpg) | Miles per Imperial Gallon (mpg) |
|---|---|
| 1 | 1.20095 |
| 5 | 6.00475 |
| 10 | 12.0095 |
| 25 | 30.0237 |
| 50 | 60.0475 |
| 100 | 120.095 |
| 500 | 600.475 |
| 1000 | 1200.95 |
How does Miles per US Gallon to Miles per Imperial Gallon conversion work?
Type a value in the Miles per US Gallon (mpg) field and the equivalent in Miles per Imperial Gallon (mpg) appears instantly to the right. The math uses the exact formula shown above — no rounding errors, no approximations beyond standard floating-point precision. Use the swap button to flip the units and see the inverse conversion.
Miles per US Gallon. The standard fuel-economy unit in the US. HIGHER is better — 30 mpg is decent; 50+ mpg is excellent.
Miles per Imperial Gallon. The UK fuel-economy unit. About 1.2× higher than US mpg because the imperial gallon is bigger. 40 UK mpg ≈ 33 US mpg.
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Conversion factors come from the official standard (NIST, BIPM, ISO definitions where applicable). Values are precise to standard floating-point limits.
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