How many miles per US gallon are in one liter per 100 kilometers?

It depends on the value, because this pair is not a simple multiple. Enter your figure above and the tool shows the exact result with the working.

Is the answer exact or rounded?

The calculation itself uses the full stored precision of the defined factor. Only the displayed figure is rounded, and the page also shows a shorter everyday value beside the full one.

Can I check the conversion the other way round?

Yes. The result panel converts the answer straight back into your original unit so you can confirm nothing was lost.

Can I download the result?

Yes — the PDF button produces a branded report with your input, the answer, the formula and the full working.

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Unit Conversions & Measures

Liters per 100 Kilometers to Miles per US Gallon Converter

Convert liters per 100 kilometers to miles per US gallon with the exact factor, the working shown step by step and a plain-English explanation.

Your inputs

Change any value to update the result instantly.

Unit Conversions & Measures

Value in liters per 100 kilometers

L/100 km

Miles per US Gallon

29.401823 mpg (US)

Value in liter per 100 kilometers (internal base unit)

8 L/100 km

Reverse conversion check

29.401823 mpg (US) = 8 L/100 km

Rounded for everyday use

29.4 mpg (US)

The US gallon is smaller than the imperial gallon, so US mpg figures are always lower for the same car.

What this calculator does

Converts a measurement given in litre per 100 kilometress into mile per US gallons using the defined conversion factor.

What your result means

The same quantity expressed in mpg (US) instead of L/100 km. Nothing about the measurement itself changes.

Formula and working

mpg (US) = convert(L/100 km) through L/100 km

1
Start with your value
8 L/100 km
2
Apply the unit relationship
mpg (US) = convert(L/100 km) through L/100 km
3
Result
8 L/100 km = 29.401823 mpg (US)

Frequently asked questions

Symbols and assumptions

L/100 km: Input unit — litre per 100 kilometres
mpg (US): Output unit — mile per US gallon

• Both units measure fuel economy, so the physical quantity is unchanged by the conversion.
• The two units are related by a defined equation rather than a single multiplier, so that equation is applied directly.
• Values are converted through the SI base unit for this quantity rather than pair by pair.

Sources and review

Reviewed 2026-09-22 · Next review 2027-09-22

The International System of Units (SI Brochure), 9th editionBureau International des Poids et Mesures · 9th edition Guide for the Use of the International System of Units (SI), NIST Special Publication 811 — conversion factorsNational Institute of Standards and Technology · 2008 edition

• A unit conversion changes how a number is expressed, not how it was measured — the answer can never be more accurate than the value entered.
• The US gallon is smaller than the imperial gallon, so US mpg figures are always lower for the same car.

Important limitation

This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.

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