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Math & Numbers

L/100km to MPG

· Last updated：2026-06-12

Convert liters per 100 kilometers to miles per gallon with configurable decimal precision

Details

What this tool helps you do

Enter liters per 100 kilometers and convert with mpg = 235.214583 ÷ (L/100km).

Execution

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Written by the Elysia Tools team
Math502
Conversion369
Miles23
Fuel Economy4

Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Category
Math & Numbers
Input types
number
Output type
json
Sample coverage
4
API ready
Yes

Overview

Easily convert fuel consumption rates from liters per 100 kilometers (L/100km) to miles per gallon (MPG) using the standard conversion formula. This tool allows you to input any L/100km value and customize the decimal precision of the output to get quick, accurate fuel economy comparisons.

When to use

  • When comparing the fuel efficiency of European or metric-spec vehicles with US or UK vehicles.
  • When importing a car and needing to translate its official fuel economy ratings to local standards.
  • When analyzing automotive datasets or specifications that mix metric and imperial fuel consumption units.

How it works

  1. 1Enter the fuel consumption value in liters per 100 kilometers (L/100km).
  2. 2Set the desired decimal precision for the output, ranging from 0 to 10 decimal places.
  3. 3The tool calculates the equivalent miles per gallon using the formula: mpg = 235.214583 / (L/100km).

Use cases

  • Car buyers comparing fuel economy ratings between imported European cars and domestic models.
  • Automotive bloggers writing reviews for international audiences who need to present fuel efficiency in both metric and imperial units.
  • Logistics managers evaluating fleet fuel efficiency across regions using different measurement standards.

Examples

1. Convert standard European hatchback fuel economy

Car Buyer

Background

A buyer is looking at a European hatchback rated at 6.5 L/100km and wants to know its fuel efficiency in MPG to compare it with local US models.

Problem

Convert 6.5 L/100km to MPG with 2 decimal places for a quick comparison.

How to use

Enter 6.5 in the Liters per 100 Kilometers field and set the Decimal Precision to 2.

litersPer100Kilometers: 6.5, precision: 2

Outcome

The tool outputs a result of 36.19 MPG.

2. High-precision conversion for automotive datasheet

Automotive Engineer

Background

An engineer is compiling a technical datasheet for a new hybrid vehicle and needs highly precise fuel economy conversions.

Problem

Convert a low fuel consumption rate of 3.8 L/100km to MPG with 6 decimal places.

How to use

Enter 3.8 in the Liters per 100 Kilometers field and set the Decimal Precision to 6.

FAQ

What formula is used for the conversion?

The tool uses the standard formula: MPG = 235.214583 divided by L/100km.

Does this tool convert to US MPG or UK MPG?

It converts to US MPG, which uses the standard conversion factor of 235.214583.

Can I adjust the decimal precision of the result?

Yes, you can configure the decimal precision from 0 up to 10 decimal places.

What happens if I enter 0 L/100km?

Division by zero is mathematically undefined, so the input must be a positive number greater than zero.

Is this conversion tool free to use?

Yes, it is completely free and performs calculations instantly in your browser.

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litersPer100Kilometers: 3.8, precision: 6

Outcome

The tool outputs a precise result of 61.898574 MPG.