MPG to Miles per Litre (MPL) Converter
Convert miles per gallon (MPG) to miles per litre (MPL). Uses UK Imperial gallons by default — the conversion most relevant for UK drivers. Formula: MPL = MPG (UK) ÷ 4.54609.
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
The constants are exact definitions: 1 Imperial gallon = 4.54609 L and 1 US gallon = 3.785411784 L.
MPG ↔ MPL Reference Table
Common UK fuel-economy values expressed in all four units. Click any MPG (UK) value for a dedicated conversion page.
| MPG (UK) | MPL | L/100km | km/L | Category |
|---|---|---|---|---|
| 25 | 5.50 | 11.3 | 8.85 | Below average |
| 30 | 6.60 | 9.42 | 10.6 | Average |
| 35 | 7.70 | 8.07 | 12.4 | Average |
| 40 | 8.80 | 7.06 | 14.2 | Good |
| 45 | 9.90 | 6.28 | 15.9 | Good |
| 50 | 11.0 | 5.65 | 17.7 | Good |
| 55 | 12.1 | 5.14 | 19.5 | Very good |
| 60 | 13.2 | 4.71 | 21.2 | Very good |
Common MPG to MPL Conversions
| MPG (UK) | MPL | L/100km |
|---|---|---|
| 15 MPG | 3.30 | 18.8 |
| 16 MPG | 3.52 | 17.7 |
| 17 MPG | 3.74 | 16.6 |
| 18 MPG | 3.96 | 15.7 |
| 19 MPG | 4.18 | 14.9 |
| 20 MPG | 4.40 | 14.1 |
| 21 MPG | 4.62 | 13.5 |
| 22 MPG | 4.84 | 12.8 |
| 23 MPG | 5.06 | 12.3 |
| 24 MPG | 5.28 | 11.8 |
| 25 MPG | 5.50 | 11.3 |
| 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 |
| 31 MPG | 6.82 | 9.11 |
| 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 |
| 37 MPG | 8.14 | 7.63 |
| 38 MPG | 8.36 | 7.43 |
| 39 MPG | 8.58 | 7.24 |
| 40 MPG | 8.80 | 7.06 |
| 41 MPG | 9.02 | 6.89 |
| 42 MPG | 9.24 | 6.73 |
| 43 MPG | 9.46 | 6.57 |
| 44 MPG | 9.68 | 6.42 |
| 45 MPG | 9.90 | 6.28 |
| 46 MPG | 10.1 | 6.14 |
| 47 MPG | 10.3 | 6.01 |
| 48 MPG | 10.6 | 5.89 |
| 49 MPG | 10.8 | 5.76 |
| 50 MPG | 11.0 | 5.65 |
| 51 MPG | 11.2 | 5.54 |
| 52 MPG | 11.4 | 5.43 |
| 53 MPG | 11.7 | 5.33 |
| 54 MPG | 11.9 | 5.23 |
| 55 MPG | 12.1 | 5.14 |
| 56 MPG | 12.3 | 5.04 |
| 57 MPG | 12.5 | 4.96 |
| 58 MPG | 12.8 | 4.87 |
| 59 MPG | 13.0 | 4.79 |
| 60 MPG | 13.2 | 4.71 |
| 61 MPG | 13.4 | 4.63 |
| 62 MPG | 13.6 | 4.56 |
| 63 MPG | 13.9 | 4.48 |
| 64 MPG | 14.1 | 4.41 |
| 65 MPG | 14.3 | 4.35 |
| 70 MPG | 15.4 | 4.04 |
| 75 MPG | 16.5 | 3.77 |
| 80 MPG | 17.6 | 3.53 |
Frequently Asked Questions
How do I convert MPG to miles per litre?
Divide your MPG (UK) value by 4.54609 (the number of litres in an Imperial gallon). Example: 40 MPG (UK) ÷ 4.54609 = 8.80 miles per litre. For US MPG, first multiply by 1.20095 to get UK MPG, then divide by 4.54609.
What is a good miles-per-litre figure in the UK?
Above 12 MPL is excellent (modern diesel and plug-in hybrids). 9–12 MPL is good (efficient petrol cars). 7–9 MPL is typical of midsize petrol cars and SUVs. Below 6 MPL is poor — often large SUVs, sports cars, or older vehicles.
Why do UK drivers use miles per litre?
UK pumps dispense fuel in litres (litre pricing since 1995), but road distances remain in miles. Miles per litre is the direct per-unit metric at the pump: multiply MPL by your fuel price per litre to get pence per mile. It bridges the UK’s mixed imperial/metric road system.
Is MPL the same as km/L?
No. Miles per litre (MPL) uses miles, km/L uses kilometres. 1 MPL = 1.609344 km/L. A car doing 10 MPL does 16.09 km/L.
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.
Why MPL Makes Sense in the UK
Britain is unique in having kept the mile for road distance while metricating fuel at the pump. Since 1 January 1995, UK forecourts have dispensed petrol and diesel exclusively in litres, yet speed limits, odometers, and motorway signs remain in miles. This split leaves drivers mentally converting every fill-up: the pump shows litres, the car shows MPG, and the wallet pays pence per litre. Miles per litre (MPL) quietly solves the problem by speaking the language of both halves at once — miles for the distance you cover, litres for the fuel you just bought.
MPL is also the figure that makes cost calculations trivial. If petrol is 150p per litre and your car does 10 MPL, then you are paying exactly 15 pence per mile — no multi-step mental arithmetic required. Converting an MPG figure to pence-per-mile needs a division by an awkward constant (4.546); MPL gets you there in a single multiplication.
Quick Reference: MPG (UK) to MPL
To turn any UK MPG figure into miles per litre, divide by 4.54609. For mental math, think of it as “MPG divided by 4.5” — close enough for estimation:
- 30 MPG (UK) → 6.60 MPL (small petrol car, motorway)
- 40 MPG (UK) → 8.80 MPL (efficient petrol saloon)
- 50 MPG (UK) → 11.00 MPL (modern diesel)
- 60 MPG (UK) → 13.20 MPL (efficient diesel or hybrid)
- 70 MPG (UK) → 15.40 MPL (plug-in hybrid on a good run)
A car advertised at 50 MPG will do roughly 11 miles on every litre — a memorable benchmark. Below 7 MPL, you’re running an inefficient or heavy vehicle; above 13 MPL, you’re in diesel/hybrid territory.
Cost per Mile from MPL
The most practical use of miles per litre is calculating your real fuel cost per mile. The formula is simply:
Pence per mile = Fuel price (pence/litre) ÷ MPL
Worked example: a car doing 9 MPL running on petrol priced at 145p/litre costs 145 ÷ 9 = 16.1 pence per mile. Over a typical UK annual mileage of 7,400 miles, that’s £1,191 a year in fuel. Switch to a car doing 13 MPL and the same mileage costs £825 — a £366 annual saving that compounds over ownership.
This is why MPL has quietly become the preferred figure on UK company-car spreadsheets and delivery-fleet dashboards: it converts fuel-economy improvements directly into pounds and pence without any unit gymnastics. And because it is linear (unlike MPG), averaging MPL values across a trip gives a meaningful answer — halving your MPL really does double your fuel cost per mile.
MPL vs Other Fuel-Economy Metrics
MPL sits at the intersection of the imperial and metric systems. Compared to the alternatives:
- MPG (UK) — familiar to UK drivers, but awkward with litre-priced fuel.
- MPG (US) — smaller gallon (3.785 L), so US MPG numbers look 20% lower than UK MPG for the same car.
- L/100km — the European-regulated figure, good for comparing vehicles but backwards-feeling to UK drivers (smaller is better).
- km/L — common in India, Japan, Brazil; not used in the UK.
If you buy fuel in the UK, MPL is arguably the most honest figure: it speaks in the units printed on your receipt and the signs on your journey.
Full Conversion Table
Need a printable reference? See the full MPG to Miles per Litre conversion table with pre-calculated values, CSV download, and print-friendly layout.
