31 US MPG to UK MPG
| 31 MPG (US) | = | 37.2 MPG (UK / Imperial) |
| 31 MPG (US) | = | 7.59 L/100km |
| 31 MPG (US) | = | 13.2 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 31 MPG (US): 31 × 1.20095 = 37.2 MPG (UK).
Is 31 MPG (US) good?
31 MPG (US) is considered Average — typical of midsize sedans and compact SUVs. In Imperial terms, that’s 37.2 MPG (UK). In metric terms, 7.59 L/100km or 13.2 km/L.
Need a different value? Use our US MPG to UK MPG Converter.
Similar Conversions
| MPG (US) | MPG (UK) | L/100km |
|---|---|---|
| 26 MPG | 31.2 | 9.05 |
| 27 MPG | 32.4 | 8.71 |
| 28 MPG | 33.6 | 8.40 |
| 29 MPG | 34.8 | 8.11 |
| 30 MPG | 36.0 | 7.84 |
| 32 MPG | 38.4 | 7.35 |
| 33 MPG | 39.6 | 7.13 |
| 34 MPG | 40.8 | 6.92 |
| 35 MPG | 42.0 | 6.72 |
| 36 MPG | 43.2 | 6.53 |
Related Fuel Economy Converters
Conversion factors verified against NIST, BIPM
Based on SI definitions (BIPM).
Last reviewed: March 2026
