How do you convert mpg to l/100km?

To convert mpg (MPG (US)) to l/100km (L/100km), apply the conversion formula: L/100km = 235.215 / MPG (US). For example, 30 MPG (US) converts to 7.84049 L/100km.

What is 30 mpg in l/100km?

30 mpg (30 MPG (US)) is equal to 7.84049 l/100km (7.84049 L/100km).

Which is larger, 1 miles per gallon (us) (MPG (US)) or 1 liters per 100 km (L/100km)?

At an input of 1 MPG (US), the equivalent value is 235.21458 L/100km, whereas 1 L/100km equals 235.21458 MPG (US). Because fuel economy scales use offset or reciprocal relationships, always check the specific operating range in the conversion table above.

How do I convert back from l/100km (L/100km) to mpg (us) (MPG (US))?

Use the Swap button in the calculator above to switch L/100km and MPG (US) immediately. For reference, 1 L/100km equals 235.21458 MPG (US).

Are there regional or standard differences when converting MPG (US) and L/100km?

US vs. UK MPG and Inverse Consumption Scales: Miles per gallon (MPG) measures distance traveled per unit of fuel (higher is better), whereas Liters per 100 km (L/100km) measures fuel volume consumed over a fixed distance (lower is better). Because the UK Imperial gallon (4.54609 L) is ~20.1% larger than the US gallon (3.78541 L), US MPG uses the conversion constant 235.215 while UK MPG uses 282.481.

MPG to L/100km Converter

Enter the fuel economy in mpg below to convert it to l/100km.

L/100km to MPG (US) (L/100km → MPG (US))

Convert MPG (US) to L/100km

Enter a value in mpg (us) (MPG (US)) to convert to l/100km (L/100km).

Value (MPG (US))

From

Result

•

7.8404861l/100km

30 MPG (US) = 7.8404861 L/100km

Result updates automatically

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Suggested Conversions

Reference:DOE / EPA (EPA 40 CFR Part 600 Fuel Economy)

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Miles per Gallon to Liters per 100 km Conversion Table

Table showing various miles per gallon measurements converted to l/100km. Click any preset value or arrow to load it into the converter.

MPG (US) (MPG (US))	L/100km (L/100km)
1 MPG (US)	235.214583 L/100km
2 MPG (US)	117.6072915 L/100km
5 MPG (US)	47.0429166 L/100km
6 MPG (US)	39.2024305 L/100km
7 MPG (US)	33.6020833 L/100km
8 MPG (US)	29.4018229 L/100km
10 MPG (US)	23.5214583 L/100km
12 MPG (US)	19.6012152 L/100km
15 MPG (US)	15.6809722 L/100km
20 MPG (US)	11.7607291 L/100km

How to Convert MPG to L/100km

To convert mpg (MPG (US)) to l/100km (L/100km), apply the governing fuel efficiency relationship: L/100km = 235.215 / MPG (US).

Use this formula to convert between mpg and l/100km:

L/100km = 235.215 / MPG (US)

Fuel consumption and distance-per-volume efficiency scales are related by exact international volume and mile/kilometer constants.

For example, here's how to convert 30 MPG (US) to l/100km using the formula above:

l/100km = 235.214583 ÷ 30 = 7.84049 = 7.8404861 L/100km

How Many L/100km Are in a Miles per Gallon?

There are 235.214583 l/100km in a miles per gallon, which is why we use this value in the formula above.

1 MPG (US) = 235.214583 L/100km|1 L/100km = 235.214583 MPG (US)

Our miles per gallon to liters per 100 km calculator automatically converts your fuel economy measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.

MPG and l/100km are both units used to measure fuel economy. Keep reading to learn more about each unit.

What Is a Miles per Gallon?

Miles traveled per US liquid gallon. It serves as a primary reference unit for measuring fuel economy across scientific and practical applications. [1]

The miles per gallon is classified as a US customary unit of fuel economy. MPG can be abbreviated as MPG (US); for example, 1 miles per gallon can be written as 1 MPG (US).

As the primary coherent reference unit for fuel economy in this category, all other fuel economy units are mathematically anchored to the miles per gallon (MPG (US)).

In practice, mpg (MPG (US)) are widely used across standard fuel economy applications within US customary workflows, engineering documentation, and technical data sheets.

Learn more about mpg in our Fuel Economy Converter.

What Is a Liters per 100 km?

Liters consumed per 100 kilometers traveled. It serves as a primary reference unit for measuring fuel economy across scientific and practical applications. [2]

The liters per 100 km is classified as a metric and SI-compatible unit of fuel economy. L/100km can be abbreviated as L/100km; for example, 1 liters per 100 km can be written as 1 L/100km.

When working with l/100km (L/100km) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.

In practice, l/100km (L/100km) are widely used across standard fuel economy applications within SI metric workflows, engineering documentation, and technical data sheets.

Learn more about l/100km in our Fuel Economy Converter.

When converting fuel economy between mpg (MPG (US)) and l/100km (L/100km), keep full floating-point precision (1 MPG (US) = 235.214583 L/100km; 1 L/100km = 235.214583 MPG (US)) during intermediate calculations and round only the final liters per 100 km figure to match your instrument tolerance.

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

Need to calculate in the opposite direction? Use our l/100km to mpg (us) converter (L/100km to MPG (US)) to switch your starting unit immediately. You can also explore related tools such as converting km/l to l/100km, converting mpg (uk) to l/100km, or converting mpg (us) to mpg (uk).

Convert from Miles per Gallon (US)

Convert to L/100km

Frequently Asked Questions

There are 235.21458 l/100km (L/100km) in 1 miles per gallon (MPG (US)). Conversely, 1 liters per 100 km (L/100km) is equal to 235.21458 mpg (MPG (US)).

Fuel Economy Converter

Quick Info

Direct Factor: 1 miles per gallon (us) (MPG (US)) equals 235.21458 l/100km (L/100km).
Inverse Factor: 1 liters per 100 km (L/100km) equals 235.21458 mpg (us) (MPG (US)).
Formula: L/100km = 235.215 / MPG (US).
Standard Note: US vs. UK MPG and Inverse Consumption Scales: Miles per gallon (MPG) measures distance traveled per unit of fuel (higher is better), whereas Liters per 100 km (L/100km) measures fuel volume consumed over a fixed distance (lower is better). Because the UK Imperial gallon (4.54609 L) is ~20.1% larger than the US gallon (3.78541 L), US MPG uses the conversion constant 235.215 while UK MPG uses 282.481.

Units Comparison

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

Miles traveled per US liquid gallon.

Liters per 100 km (L/100km)

Liters consumed per 100 kilometers traveled.

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

Miles traveled per UK Imperial gallon.

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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References

NIST · BIPM · ISO

[1]
DOE / EPA (EPA 40 CFR Part 600 Fuel Economy)·Fuel Economy Metrology Standard — MPG (US) (MPG (US)) to L/100km (L/100km)
DOE / EPA Standard
[2]
NIST SP 811 (NIST SP 811 App. B.9 (Fuel Consumption))·Unit Specifications: Miles per Gallon (US) (MPG (US)) & Liters per 100 km (L/100km)
NIST SP 811 Specification
[3]
NIST OWM (SI Units — Volume (US vs. Imperial Gallon))·Conversion Factors & Mathematical Basis (MPG (US) to L/100km)
NIST OWM Reference

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