10 US MPG to UK MPG
| 10 MPG (US) | = | 12.0 MPG (UK / Imperial) |
| 10 MPG (US) | = | 23.5 L/100km |
| 10 MPG (US) | = | 4.25 km/L |
How to Convert US MPG to UK MPG
The conversion is linear — the difference is entirely in the size of the gallon, not in the miles.
- MPG (UK) = MPG (US) × 1.20095042
The factor 1.20095 is the exact ratio between the Imperial gallon (4.54609 L) and the US gallon (3.785411784 L).
Applying the formula to 10 MPG (US): 10 × 1.20095 = 12.0 MPG (UK).
Is 10 MPG (US) good?
10 MPG (US) is considered Poor — typical of large trucks, RVs, and heavy-duty vehicles. In Imperial terms, that’s 12.0 MPG (UK). In metric terms, 23.5 L/100km or 4.25 km/L.
Need a different value? Use our US MPG to UK MPG Converter.
Similar Conversions
| MPG (US) | MPG (UK) | L/100km |
|---|---|---|
| 11 MPG | 13.2 | 21.4 |
| 12 MPG | 14.4 | 19.6 |
| 13 MPG | 15.6 | 18.1 |
| 14 MPG | 16.8 | 16.8 |
| 15 MPG | 18.0 | 15.7 |
Related Fuel Economy Converters
Conversion factors verified against NIST, BIPM
Based on SI definitions (BIPM).
Last reviewed: March 2026
