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    Fuel Economy & Efficiency Reference

    Fuel economy units flip between “distance per unit of fuel” and “fuel per unit of distance.” This guide clarifies the difference and shows you how to move between them.

    Use the tables to compare combustion vehicle ratings with electric vehicle efficiency metrics. Pay attention to whether a unit rewards higher or lower numbers and convert accordingly.

    Base unit

    Kilometer per Liter (km/L)

    Units covered

    10

    Popular conversions

    6

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    Jump directly to any available converter for fuel economy & efficiency reference units.

    90 options
    km/L → L/100kmKilometer per Liter to Liter per 100 kmView detailskm/L → MPG (US)Kilometer per Liter to Mile per Gallon (US)View detailskm/L → MPG (UK)Kilometer per Liter to Mile per Gallon (UK)View detailskm/L → km/kWhKilometer per Liter to Kilometer per kWhView detailskm/L → mi/kWhKilometer per Liter to Mile per kWhView detailskm/L → kWh/100kmKilometer per Liter to kWh per 100 kmView detailskm/L → kWh/100miKilometer per Liter to kWh per 100 milesView detailskm/L → Wh/kmKilometer per Liter to Watt-hour per kilometerView detailskm/L → Wh/miKilometer per Liter to Watt-hour per mileView detailsL/100km → km/LLiter per 100 km to Kilometer per LiterView detailsL/100km → MPG (US)Liter per 100 km to Mile per Gallon (US)View detailsL/100km → MPG (UK)Liter per 100 km to Mile per Gallon (UK)View detailsL/100km → km/kWhLiter per 100 km to Kilometer per kWhView detailsL/100km → mi/kWhLiter per 100 km to Mile per kWhView detailsL/100km → kWh/100kmLiter per 100 km to kWh per 100 kmView detailsL/100km → kWh/100miLiter per 100 km to kWh per 100 milesView detailsL/100km → Wh/kmLiter per 100 km to Watt-hour per kilometerView detailsL/100km → Wh/miLiter per 100 km to Watt-hour per mileView detailsMPG (US) → km/LMile per Gallon (US) to Kilometer per LiterView detailsMPG (US) → L/100kmMile per Gallon (US) to Liter per 100 kmView detailsMPG (US) → MPG (UK)Mile per Gallon (US) to Mile per Gallon (UK)View detailsMPG (US) → km/kWhMile per Gallon (US) to Kilometer per kWhView detailsMPG (US) → mi/kWhMile per Gallon (US) to Mile per kWhView detailsMPG (US) → kWh/100kmMile per Gallon (US) to kWh per 100 kmView detailsMPG (US) → kWh/100miMile per Gallon (US) to kWh per 100 milesView detailsMPG (US) → Wh/kmMile per Gallon (US) to Watt-hour per kilometerView detailsMPG (US) → Wh/miMile per Gallon (US) to Watt-hour per mileView detailsMPG (UK) → km/LMile per Gallon (UK) to Kilometer per LiterView detailsMPG (UK) → L/100kmMile per Gallon (UK) to Liter per 100 kmView detailsMPG (UK) → MPG (US)Mile per Gallon (UK) to Mile per Gallon (US)View detailsMPG (UK) → km/kWhMile per Gallon (UK) to Kilometer per kWhView detailsMPG (UK) → mi/kWhMile per Gallon (UK) to Mile per kWhView detailsMPG (UK) → kWh/100kmMile per Gallon (UK) to kWh per 100 kmView detailsMPG (UK) → kWh/100miMile per Gallon (UK) to kWh per 100 milesView detailsMPG (UK) → Wh/kmMile per Gallon (UK) to Watt-hour per kilometerView detailsMPG (UK) → Wh/miMile per Gallon (UK) to Watt-hour per mileView detailskm/kWh → km/LKilometer per kWh to Kilometer per LiterView detailskm/kWh → L/100kmKilometer per kWh to Liter per 100 kmView detailskm/kWh → MPG (US)Kilometer per kWh to Mile per Gallon (US)View detailskm/kWh → MPG (UK)Kilometer per kWh to Mile per Gallon (UK)View detailskm/kWh → mi/kWhKilometer per kWh to Mile per kWhView detailskm/kWh → kWh/100kmKilometer per kWh to kWh per 100 kmView detailskm/kWh → kWh/100miKilometer per kWh to kWh per 100 milesView detailskm/kWh → Wh/kmKilometer per kWh to Watt-hour per kilometerView detailskm/kWh → Wh/miKilometer per kWh to Watt-hour per mileView detailsmi/kWh → km/LMile per kWh to Kilometer per LiterView detailsmi/kWh → L/100kmMile per kWh to Liter per 100 kmView detailsmi/kWh → MPG (US)Mile per kWh to Mile per Gallon (US)View detailsmi/kWh → MPG (UK)Mile per kWh to Mile per Gallon (UK)View detailsmi/kWh → km/kWhMile per kWh to Kilometer per kWhView detailsmi/kWh → kWh/100kmMile per kWh to kWh per 100 kmView detailsmi/kWh → kWh/100miMile per kWh to kWh per 100 milesView detailsmi/kWh → Wh/kmMile per kWh to Watt-hour per kilometerView detailsmi/kWh → Wh/miMile per kWh to Watt-hour per mileView detailskWh/100km → km/LkWh per 100 km to Kilometer per LiterView detailskWh/100km → L/100kmkWh per 100 km to Liter per 100 kmView detailskWh/100km → MPG (US)kWh per 100 km to Mile per Gallon (US)View detailskWh/100km → MPG (UK)kWh per 100 km to Mile per Gallon (UK)View detailskWh/100km → km/kWhkWh per 100 km to Kilometer per kWhView detailskWh/100km → mi/kWhkWh per 100 km to Mile per kWhView detailskWh/100km → kWh/100mikWh per 100 km to kWh per 100 milesView detailskWh/100km → Wh/kmkWh per 100 km to Watt-hour per kilometerView detailskWh/100km → Wh/mikWh per 100 km to Watt-hour per mileView detailskWh/100mi → km/LkWh per 100 miles to Kilometer per LiterView detailskWh/100mi → L/100kmkWh per 100 miles to Liter per 100 kmView detailskWh/100mi → MPG (US)kWh per 100 miles to Mile per Gallon (US)View detailskWh/100mi → MPG (UK)kWh per 100 miles to Mile per Gallon (UK)View detailskWh/100mi → km/kWhkWh per 100 miles to Kilometer per kWhView detailskWh/100mi → mi/kWhkWh per 100 miles to Mile per kWhView detailskWh/100mi → kWh/100kmkWh per 100 miles to kWh per 100 kmView detailskWh/100mi → Wh/kmkWh per 100 miles to Watt-hour per kilometerView detailskWh/100mi → Wh/mikWh per 100 miles to Watt-hour per mileView detailsWh/km → km/LWatt-hour per kilometer to Kilometer per LiterView detailsWh/km → L/100kmWatt-hour per kilometer to Liter per 100 kmView detailsWh/km → MPG (US)Watt-hour per kilometer to Mile per Gallon (US)View detailsWh/km → MPG (UK)Watt-hour per kilometer to Mile per Gallon (UK)View detailsWh/km → km/kWhWatt-hour per kilometer to Kilometer per kWhView detailsWh/km → mi/kWhWatt-hour per kilometer to Mile per kWhView detailsWh/km → kWh/100kmWatt-hour per kilometer to kWh per 100 kmView detailsWh/km → kWh/100miWatt-hour per kilometer to kWh per 100 milesView detailsWh/km → Wh/miWatt-hour per kilometer to Watt-hour per mileView detailsWh/mi → km/LWatt-hour per mile to Kilometer per LiterView detailsWh/mi → L/100kmWatt-hour per mile to Liter per 100 kmView detailsWh/mi → MPG (US)Watt-hour per mile to Mile per Gallon (US)View detailsWh/mi → MPG (UK)Watt-hour per mile to Mile per Gallon (UK)View detailsWh/mi → km/kWhWatt-hour per mile to Kilometer per kWhView detailsWh/mi → mi/kWhWatt-hour per mile to Mile per kWhView detailsWh/mi → kWh/100kmWatt-hour per mile to kWh per 100 kmView detailsWh/mi → kWh/100miWatt-hour per mile to kWh per 100 milesView detailsWh/mi → Wh/kmWatt-hour per mile to Watt-hour per kilometerView details

    Unit breakdown

    Every unit below references the SI base value so you can compare readings quickly.

    UnitSymbol1 unit in km/LNotes
    Kilometer per Literkm/LSee formulas belowdirect efficiency
    Liter per 100 kmL/100kmSee formulas belowinverse consumption
    Mile per Gallon (US)MPG (US)See formulas belowdirect efficiency
    Mile per Gallon (UK)MPG (UK)See formulas belowdirect efficiency
    Kilometer per kWhkm/kWhSee formulas belowdirect efficiency
    Mile per kWhmi/kWhSee formulas belowdirect efficiency
    kWh per 100 kmkWh/100kmSee formulas belowinverse consumption
    kWh per 100 mileskWh/100miSee formulas belowinverse consumption
    Watt-hour per kilometerWh/kmSee formulas belowinverse consumption
    Watt-hour per mileWh/miSee formulas belowinverse consumption

    Popular conversions

    These presets mirror the quick actions available inside the SwapUnits converter.

    Launch converter
    ConversionExampleReference pageWhy it matters
    MPG (US) to km/L1 MPG (US) = 0.425144 km/LOpenIdeal for quick checks inside the live converter.
    km/L to MPG (UK)1 km/L = 2.82481 MPG (UK)OpenIdeal for quick checks inside the live converter.
    kWh/100km to mi/kWh (EV)1 kWh/100km = 62.1371 mi/kWhOpenIdeal for quick checks inside the live converter.
    mi/kWh to kWh/100km (EV)1 mi/kWh = 62.1371 kWh/100kmOpenIdeal for quick checks inside the live converter.
    Wh/km to Wh/mi (EV)1 Wh/km = 1.60934 Wh/miOpenIdeal for quick checks inside the live converter.
    Wh/mi to Wh/km (EV)1 Wh/mi = 0.621371 Wh/kmOpenIdeal for quick checks inside the live converter.

    Frequently asked questions

    Why are some fuel economy numbers better when they are lower?

    Units like L/100 km or kWh/100 km measure consumption per distance, so lower values mean less energy used. Units like MPG or km/L measure distance per fuel, so higher values are better.

    How do I compare US MPG with UK MPG?

    UK (imperial) gallons are larger. To convert US MPG to UK MPG, multiply by 1.20095. The reverse conversion divides by the same factor.

    What should EV drivers monitor besides mi/kWh?

    Include charging efficiency and ambient temperature. Cold weather and high-speed driving reduce mi/kWh even if the rated consumption stays constant.

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