What is the base SI unit for fuel economy?

The primary reference unit for fuel economy in this converter is the Miles per Gallon (US) (MPG (US)). All 4 supported fuel economy units are anchored to this standard.

Are these fuel economy conversion factors verified?

Yes, all fuel economy conversion constants on UnitConvertersGo are verified against NIST Special Publication 811 and ISO/IEC 80000 international metrology standards.

Fuel Economy Converter

Enter a value below to convert between metric, imperial, and standard fuel economy units.

Convert Fuel Economy

Enter a value and select the units to convert between mpg (us), l/100km, and km/l.

Instant conversion

Value

From

Result

23.52146 L/100km

10 MPG (US) = 23.52146 L/100km

10 MPG (US) = 23.52146 L/100km = 4.25144 km/LGet Widget

You can change the units using the dropdowns above or click on a unit button.

Suggested Conversions

Common Fuel Economy Reference Points

Here are some common fuel economy values in Miles per Gallon (US) (MPG (US)), Liters per 100 km (L/100km), and Kilometers per Liter (km/L). Click any preset value or arrow to load it into the converter.

Description	Miles per Gallon (US) (MPG (US))	Liters per 100 km (L/100km)	Kilometers per Liter (km/L)
Heavy pickup truck (15 MPG US)	15	15.68097	6.37716
Mid-size SUV (25 MPG US)	25	9.40858	10.62859
Efficient highway sedan (35 MPG US)	35	6.72042	14.88003
Hybrid vehicle (50 MPG US)	50	4.70429	21.25719
High-efficiency hybrid (60 MPG US)	60	3.92024	25.50862

Fuel Economy Conversion Formulas

Use the following formulas to convert between mpg (us), l/100km, and km/l.

US MPG to L/100km

L/100km = 235.215 ÷ MPG

US MPG to km/L

km/L = MPG × 0.425144

US MPG to UK MPG

MPG(UK) = MPG(US) × 1.20095

Example: Convert 30 MPG (US) to Liters per 100 km (L/100km)

L/100km = 235.214583 ÷ 30

L/100km = 7.840486 L/100km

MPG and L/100km have an inverse (reciprocal) relationship: higher MPG means lower L/100km fuel consumption.

More Miles per Gallon (US) & Liters per 100 km Conversions

Convert from Miles per Gallon (US)

Convert to L/100km

Frequently Asked Questions

1 miles per gallon (us) (MPG (US)) equals 235.21458 l/100km (L/100km). Multiply your miles per gallon (us) value by 235.21458 or enter it in the Fuel Economy Converter above for instant calculation.

Fuel Economy Converter

Quick Info

MPG (US) measures miles traveled per US liquid gallon (3.78541 L) and is standard in the United States.
L/100km measures liters of fuel consumed per 100 km (lower is better), used across Europe, Canada, and Australia.
km/L measures kilometers traveled per liter, widely used in Japan, India, and Latin America.
MPG (UK Imperial): Uses the larger 4.54609 L Imperial gallon, so UK MPG values are 20.1% higher than US MPG.

Fuel Economy Units Comparison

Miles per Gallon (US)

Distance in miles traveled per US gallon (3.785 L) of fuel.

Liters per 100 km (L/100km)

Inverse consumption metric: 235.215 divided by US MPG.

Kilometers per Liter (km/L)

Metric distance per liter (1 km/L ≈ 2.35215 US MPG).

References

[1]DOE / EPA · EPA 40 CFR Part 600 Fuel Economy
Source
[2]NIST SP 811 · NIST SP 811 App. B.9 (Fuel Consumption)
Source
[3]NIST OWM · SI Units — Volume (US vs. Imperial Gallon)
Source

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All Fuel Economy Conversion Calculators (10)

Select any dedicated fuel economy pair below for worked examples and printable tables

US MPG to L/100km (Miles per Gallon to Liters/100km)L/100km to US MPG (Liters/100km to Miles per Gallon)US MPG to UK Imperial MPG Kilometers per Liter to US MPG (km/L to MPG)US MPG to Kilometers per Liter (MPG to km/L)Kilometers per Liter to Liters per 100 km (km/L to L/100km)Liters per 100 km to Kilometers per Liter (L/100km to km/L)UK Imperial MPG to US MPG UK Imperial MPG to Liters per 100 km (MPG UK to L/100km)Liters per 100 km to UK Imperial MPG (L/100km to MPG UK)

Category Conversion Matrix

Simultaneous comparison of 4 units in this category

Miles per Gallon (US) (MPG (US))

Miles per Gallon (UK) (MPG (UK))

1.20095

Kilometers per Liter (km/L)

0.42514

Liters per 100 km (L/100km)

235.21458

Fuel Economy Unit Definitions & Symbols

Miles per Gallon (US) (MPG (US))

US CUSTOMARY

Miles traveled per US liquid gallon.

Miles per Gallon (UK) (MPG (UK))

IMPERIAL

Miles traveled per UK Imperial gallon.

Kilometers per Liter (km/L)

METRIC

Kilometers traveled per liter of fuel.

Liters per 100 km (L/100km)

METRIC

Liters consumed per 100 kilometers traveled.

References

NIST · BIPM · ISO

[1]
DOE / EPA (EPA 40 CFR Part 600 Fuel Economy)·Fuel Economy Metrology Standards — Miles per Gallon (US) (MPG (US)), Miles per Gallon (UK) (MPG (UK)) & Kilometers per Liter (km/L)
DOE / EPA Standard
[2]
NIST SP 811 (NIST SP 811 App. B.9 (Fuel Consumption))·International Reference Specification for Automotive Fuel Consumption
NIST SP 811 Reference
[3]
NIST OWM (SI Units — Volume (US vs. Imperial Gallon))·Official Fuel Economy Conversion Factors & Rounding Rules
NIST OWM Tables

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