Free Fuel Economy Converter that works offline
Compare vehicle consumption figures from different countries without mixing reciprocal units or gallon definitions.
What this fuel economy converter does
L/100 km measures consumption, while km/L and MPG measure distance per fuel volume. Converting between them requires a reciprocal relationship rather than a simple constant factor.
How to use the Fuel Economy Converter
- Enter or paste a positive fuel-economy value and source and target units into the tool.
- Adjust the available options so they match the format and result you need.
- Choose Convert fuel economy and review the equivalent efficiency or consumption value before using it.
- Copy or download the result, then clear the page if the input was sensitive.
Common uses
- Comparing imported vehicle specifications
- Converting trip-computer readings
- Understanding US and UK MPG differences
- Estimating international fuel figures
Private processing and offline access
This tool does not submit your input to a conversion server. Processing takes place inside the browser using local JavaScript and standard Web APIs. After the PWA has been installed or cached, the page and its core features remain available without an internet connection. Closing or clearing the page removes unsaved input; the tool does not create an account or cloud history.
Tips for accurate results
- US and imperial MPG are not equal.
- Real consumption changes with conditions and driving style.
- Zero cannot be converted because reciprocal units would be undefined.
Frequently asked questions
Does this tool upload my data?
No. Fuel Economy Converter processes its input in the current browser and does not submit it to a conversion API.
What input does the Fuel Economy Converter accept?
Positive finite values are supported. US and imperial gallons are labeled separately.
Can I use this tool offline?
Yes. Once the Offline Tools PWA has cached the page, the core feature works without an internet connection.