L/100mi
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Equivalent fuel consumption
Accurate conversion between L/100km and L/100mi fuel consumption
Convert Litres per 100 Kilometres to Litres per 100 Miles instantly with precise calculations. Includes reverse L/100mi to L/100km conversion, full formula reference, real-world fuel economy examples, and reference tables for 2026.
Professional fuel consumption conversion for automotive, transport, fleet management, and travel planning
Convert Litres per 100km to Litres per 100 Miles using the exact defined relationship between the kilometre and the international mile: 1 mile = 1.609344 km exactly. Therefore, L/100mi = L/100km × 1.609344. Our tool delivers full-precision results instantly for any fuel consumption value, from ultra-efficient hybrids through to heavy trucks and performance vehicles.
Switch between L/100km to L/100mi and L/100mi to L/100km conversion in one click. Whether you are comparing a European vehicle fuel economy specification (L/100km) with a UK fuel cost calculation based on miles, planning a road trip fuel budget across different countries, or cross-referencing fleet data — both directions are handled instantly from a single input.
Essential for automotive research, vehicle import/export comparisons, fleet management, travel cost planning, emissions calculations, and road trip budgeting in 2026. Australia, Europe, and most of Asia use L/100km as the official fuel consumption measure; the UK commonly uses both miles and litres — making L/100km to L/100mi one of the most practically useful fuel economy conversions available.
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Litres per 100 kilometres (L/100km) is the standard metric unit for measuring fuel consumption. It expresses how many litres of fuel a vehicle uses to travel 100 kilometres. A lower L/100km value means better fuel efficiency — a car consuming 5 L/100km is more economical than one consuming 10 L/100km. This unit is the official standard in Australia, the European Union, China, and most metric countries for vehicle fuel economy labelling and government emissions reporting.
The equivalent measure using miles is Litres per 100 Miles (L/100mi), which expresses how many litres are consumed per 100 miles — useful in the United Kingdom, where roads are measured in miles but fuel is sold in litres. You can explore more unit converters at the ConcreticMetric converter hub.
The conversion uses the exact internationally defined length of the mile: 1 international mile = 1.609344 kilometres exactly (since 1959). Because both units measure the same quantity (volume of fuel per unit distance), and only the distance unit changes, the conversion is a direct multiplication or division by 1.609344.
Example: 7.5 L/100km × 1.609344 = 12.070 L/100mi
Example: 12 L/100mi ÷ 1.609344 = 7.457 L/100km
Bar heights represent relative fuel consumption from highly efficient hybrid to heavy truck
The reference table below covers the most commonly needed L/100km to L/100mi conversions, spanning ultra-efficient EVs and hybrids through to large trucks and performance vehicles.
| L/100km | L/100mi | km per Litre | Real-World Reference |
|---|---|---|---|
| 3.0 L/100km | 4.828 L/100mi | 33.33 km/L | Exceptional hybrid / mild EV range extender |
| 3.5 L/100km | 5.633 L/100mi | 28.57 km/L | Best-in-class diesel compact |
| 4.0 L/100km | 6.437 L/100mi | 25.00 km/L | Toyota Prius / efficient diesel hatch |
| 4.5 L/100km | 7.242 L/100mi | 22.22 km/L | Petrol-electric hybrid city car |
| 5.0 L/100km | 8.047 L/100mi | 20.00 km/L | Efficient small petrol hatchback |
| 5.5 L/100km | 8.851 L/100mi | 18.18 km/L | Average small petrol hatchback |
| 6.0 L/100km | 9.656 L/100mi | 16.67 km/L | Compact sedan — mixed driving |
| 6.5 L/100km | 10.461 L/100mi | 15.38 km/L | Mazda 3 / VW Golf average |
| 7.0 L/100km | 11.265 L/100mi | 14.29 km/L | Mid-size family sedan |
| 7.5 L/100km | 12.070 L/100mi | 13.33 km/L | Average family car — combined cycle |
| 8.0 L/100km | 12.875 L/100mi | 12.50 km/L | Typical Australian family sedan |
| 9.0 L/100km | 14.484 L/100mi | 11.11 km/L | Small SUV — city driving |
| 10.0 L/100km | 16.093 L/100mi | 10.00 km/L | Medium SUV / light 4WD |
| 11.0 L/100km | 17.703 L/100mi | 9.09 km/L | Large SUV — combined use |
| 12.0 L/100km | 19.312 L/100mi | 8.33 km/L | V8 sedan / heavy SUV |
| 13.0 L/100km | 20.921 L/100mi | 7.69 km/L | Large 4WD wagon — off road |
| 15.0 L/100km | 24.140 L/100mi | 6.67 km/L | Performance sports car |
| 20.0 L/100km | 32.187 L/100mi | 5.00 km/L | Supercar / muscle car hard driving |
| 25.0 L/100km | 40.234 L/100mi | 4.00 km/L | Heavy truck / loaded towing |
Converting L/100km to L/100mi is straightforward because only the distance unit changes — the volume (litres) stays the same. Here is the step-by-step method:
L/100km is the official fuel consumption unit in Australia, the European Union, China, Japan, and most metric countries. The United Kingdom officially uses L/100km for new car labels since 2021 — but because UK roads are measured in miles, fuel cost calculations often require L/100mi conversion. The only major difference between the two units is the distance base: 100 kilometres vs 100 miles.
The international mile is defined as exactly 1.609344 kilometres since the International Yard and Pound Agreement of 1959. This means every L/100km to L/100mi conversion is exact — no rounding at the conversion factor level. 100 miles = 160.9344 km, so a car doing 8 L/100km uses exactly 12.875 litres to travel 100 miles.
Unlike MPG (miles per gallon) where a higher number means better efficiency, L/100km and L/100mi are consumption rates — a lower number is better. A car rated at 5 L/100km (8.05 L/100mi) is more economical than one at 10 L/100km (16.09 L/100mi). This is the most common point of confusion when comparing fuel economy figures across markets.
In the UK, fuel is sold by the litre but distances are measured in miles. To calculate fuel cost per 100 miles in the UK: convert your L/100km to L/100mi first, then multiply by the fuel price per litre. Example: 7 L/100km = 11.27 L/100mi. At £1.50/litre: 11.27 × £1.50 = £16.90 per 100 miles — a directly useful real-world figure for UK drivers.
For electric vehicles, energy consumption is expressed in kWh per 100km rather than L/100km. However, plug-in hybrid (PHEV) and range-extended EV fuel consumption in combustion mode is still listed in L/100km. Converting a PHEV's 1.8 L/100km fuel figure for a UK trip: 1.8 × 1.609344 = 2.90 L/100mi — useful for calculating fuel stops on long UK motorway journeys.
Australia's Green Vehicle Guide rates all new vehicles in L/100km for combined (city + highway) driving cycles. The average new passenger car sold in Australia in 2025 consumed approximately 8.2 L/100km (13.20 L/100mi). The most efficient petrol-electric hybrids achieve around 4.0–4.5 L/100km (6.44–7.24 L/100mi) in combined testing.
L/100mi = L/100km × 1.609344
L/100km = L/100mi ÷ 1.609344
The conversion factor is exact — 1 mile = 1.609344 km by international definition since 1959.
A car is rated at 6.5 L/100km combined. You are planning a 300-mile trip in the UK.
Step 1: 6.5 × 1.609344 = 10.461 L/100mi
Step 2: 300 miles ÷ 100 × 10.461 = 31.38 litres needed
Step 3: At £1.55/litre: 31.38 × £1.55 = £48.64 total fuel cost
Litres per 100 miles (L/100mi) and miles per gallon (MPG) both use miles as the distance unit but are not directly interchangeable — MPG uses UK gallons (4.546 L) or US gallons (3.785 L). A car at 10 L/100mi = 28.2 UK MPG or 23.5 US MPG. Always clarify which gallons are used when comparing MPG figures between UK and US specifications to avoid a 20% error in fuel cost estimates.
The Australian Government's Green Vehicle Guide provides official fuel consumption ratings in L/100km for all new vehicles sold in Australia. It is the authoritative source for comparing vehicle fuel economy, CO₂ emissions, and energy consumption ratings under Australian Design Rules and ADR 81/02 test procedures in 2026.
Visit GVG →The UK VCA provides official fuel consumption data for all vehicles type-approved for sale in the United Kingdom. Following the WLTP (Worldwide Harmonised Light Vehicle Test Procedure) standard, vehicles are rated in L/100km and g/km CO₂, with UK buyers often using L/100mi for real-world cost calculations due to the mix of metric fuel pricing and imperial road distances.
Visit VCA →ConcreticMetric offers free converters for fuel economy, speed, weight, length, area, pressure, energy, power, time, and more. All tools are mobile-friendly, free, and built for accuracy in 2026 — with instant results, full formula references, and real-world examples for every conversion.
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