31 MPG to Miles per Litre
| 31 MPG (UK) | = | 6.82 miles per litre |
| 31 MPG (UK) | = | 9.11 L/100km |
| 31 MPG (UK) | = | 11.0 km/L |
| 31 MPG (UK) | = | 25.8 MPG (US) |
How to Convert MPG to Miles per Litre
The conversion is linear: a litre is a fixed fraction of a gallon, so dividing MPG by the litres-per-gallon constant gives miles per litre directly.
- MPL = MPG (UK) ÷ 4.54609
- MPL = MPG (US) ÷ 3.785411784
Applying the formula to 31 MPG (UK): 31 ÷ 4.54609 = 6.82 miles per litre.
Is 31 MPG (UK) good?
31 MPG (UK) is considered Average — typical petrol car or SUV. That works out to 6.82 miles per litre, 9.11 L/100km, or 11.0 km/L. In US terms, 31 MPG (UK) = 25.8 MPG (US).
Need a different value? Use our MPG to Miles per Litre Converter.
Similar Conversions
| MPG (UK) | MPL | L/100km |
|---|---|---|
| 26 MPG | 5.72 | 10.9 |
| 27 MPG | 5.94 | 10.5 |
| 28 MPG | 6.16 | 10.1 |
| 29 MPG | 6.38 | 9.74 |
| 30 MPG | 6.60 | 9.42 |
| 32 MPG | 7.04 | 8.83 |
| 33 MPG | 7.26 | 8.56 |
| 34 MPG | 7.48 | 8.31 |
| 35 MPG | 7.70 | 8.07 |
| 36 MPG | 7.92 | 7.85 |
Related Fuel Economy Converters
Miles per Litre to MPG
Reverse conversion: miles per litre to miles per gallon (UK and US).
MPG (UK) to L/100km
Convert Imperial MPG to litres per 100 km for European comparisons.
MPG to L/100km
Miles per gallon (US/UK) to litres per 100 km.
MPG Calculator
Calculate your car’s MPG from distance and fuel used.
Conversion factors verified against NIST, BIPM
Based on SI definitions (BIPM).
Last reviewed: March 2026
