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Math & Numbers

MPG to L/100km

· Last updated：2026-06-12

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

Details

What this tool helps you do

Enter US miles per gallon and convert with L/100km = 235.214583 ÷ mpg.

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 US miles per gallon (MPG) to liters per 100 kilometers (L/100km) with this precise fuel economy calculator. By applying the standard conversion formula of 235.214583 divided by MPG, the tool provides instant results with customizable decimal precision to help you compare vehicle efficiency across different regional standards.

When to use

  • When comparing the fuel efficiency of American vehicles measured in MPG against European or metric standards measured in L/100km.
  • When importing a car from the US and needing to calculate its fuel consumption rate for local registration or comparison.
  • When analyzing automotive datasets that mix imperial and metric fuel economy metrics.

How it works

  1. 1Enter the fuel economy value in US miles per gallon (MPG) into the input field.
  2. 2Set your desired decimal precision to control the rounding of the output.
  3. 3The tool calculates the metric equivalent using the formula: L/100km = 235.214583 / MPG.
  4. 4View or copy the converted result instantly in structured JSON format.

Use cases

  • Converting US car specification sheets to metric units for international buyers.
  • Standardizing fuel consumption data in automotive research spreadsheets.
  • Calculating fuel costs for road trips when driving a US-spec rental car in a country using metric measurements.

Examples

1. Converting a Standard Sedan's Fuel Economy

Car Buyer

Background

A buyer in Germany is looking to import a US-spec sedan rated at 30 MPG but needs to know its fuel consumption in liters per 100 kilometers to compare it with local models.

Problem

Convert 30 MPG to L/100km with standard four-decimal precision.

How to use

Input 30 in the MPG field and set the decimal precision to 4.

{
  "mpg": 30,
  "precision": 4
}

Outcome

The tool outputs a result of 7.8405 L/100km.

2. High-Precision Conversion for a Hybrid Vehicle

Automotive Journalist

Background

A journalist is writing a review comparing a new hybrid vehicle rated at 52 MPG against European competitors.

Problem

Convert 52 MPG to L/100km with high precision to show exact differences.

How to use

Input 52 in the MPG field and set the decimal precision to 6.

FAQ

What formula is used for the MPG to L/100km conversion?

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

Does this tool support UK (Imperial) MPG?

No, this tool specifically converts US miles per gallon to liters per 100 kilometers.

Can I customize the number of decimal places in the output?

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

Why does a higher MPG result in a lower L/100km value?

MPG measures distance per unit of fuel, while L/100km measures fuel volume per distance; therefore, they are inversely proportional.

Is there a limit to the MPG value I can input?

You can input any positive number, though extremely low values close to zero will yield very high L/100km results.

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{ "mpg": 52, "precision": 6 }

Outcome

The tool outputs a precise result of 4.523357 L/100km.