# Fuel consumption converter

> Compare fuel consumption and US or UK mpg.

[Open tool](https://www.toolcabana.com/cu/fuel-converter) · [Units and measurement](https://www.toolcabana.com/cu/category/units-and-measurement)

Tool ID: fuel-converter. Requested language: cu. Description language: en. Complete guide translation: no; untranslated sections use English.

## Overview (en)

The Fuel consumption converter takes a fuel economy figure and returns it in another system: liters per 100 km, US miles per gallon, UK miles per gallon or kilometers per liter. It converts through L/100km using the constants 235.214583 for US mpg and 282.4809363 for UK mpg, and it rejects zero or negative values.

## Supported tasks (en)

Compare fuel consumption and US or UK mpg.

## Steps (en)

1. Adjust the values; an initial result is calculated from the defaults.
2. Change the basic settings or open Advanced mode to fine-tune the result.
3. Review and copy or download your result. Pause Live results to run manually. Sources or individual settings above 20,000 characters require an explicit run.

## Settings

- Value (en; key: value; type: number)
- From (en; key: from; type: select): L/100km [en], US mpg [en], UK mpg [en], km/L [en]
- To (en; key: to; type: select): L/100km [en], US mpg [en], UK mpg [en], km/L [en]
- Significant digits (en; key: precision; type: number); minimum: 1; maximum: 15
- Number display (en; key: notation; type: select): Standard (grouped) [en], Plain (no grouping) [en], Scientific notation [en]

## Limitations (en)

Use finite numbers, valid dates and the ranges shown by each control. Invalid values produce an error without a downloadable result.

## Privacy and connections (en)

This operation processes its source in your browser. Copy and download are explicit actions; source input is not saved in an account or history.

## Questions (en)

### How do I convert mpg to L/100km?

Divide 235.214583 by the US mpg figure, or 282.4809363 by the UK mpg figure. A car rated 30 US mpg uses about 7.84 L/100km. The converter applies these constants automatically when you choose the units.

### Why are US and UK mpg different?

A UK, or imperial, gallon is larger than a US gallon, so the same car shows a higher UK mpg figure. In this converter, 30 US mpg equals about 36.03 UK mpg.

### How do I convert km/L to L/100km?

Divide 100 by the km/L figure. For example, 20 km/L is 5 L/100km. Because the relationship is inverse, a higher km/L or mpg means a lower L/100km value, which the converter handles for you.

### Where is my input processed?

This operation processes its source in your browser. Copy and download are explicit actions; source input is not saved in an account or history.

### What are the input limits?

Use finite numbers, valid dates and the ranges shown by each control. Invalid values produce an error without a downloadable result.

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