Fuel Economy Converter
Convert between MPG (US), MPG (UK), km/L, L/100km, and km/gallon fuel economy units. Free, fast, and works entirely in your browser with no sign-up required.
Fuel Economy Converter
Convert between MPG (US), MPG (UK/Imperial), km/L, L/100km, km/gallon (US), and km/gallon (UK). Live bidirectional conversion with reference table.
Quick Presets
Fuel Economy Converter
All Equivalents
MPG (US)
30
MPG (UK/Imperial)
36.0285
Kilometers per Liter
12.7543
Liters per 100 km
7.8405
Kilometers per Gallon (US)
48.2803
Kilometers per Gallon (UK)
57.9822
Reference Table (Common MPG US Values)
| mpg (US) | mpg (UK) | km/L | L/100km | km/gal (US) | km/gal (UK) |
|---|---|---|---|---|---|
| 10 | 12.01 | 4.25 | 23.52 | 16.09 | 19.33 |
| 20 | 24.02 | 8.5 | 11.76 | 32.19 | 38.65 |
| 30 | 36.03 | 12.75 | 7.84 | 48.28 | 57.98 |
| 40 | 48.04 | 17.01 | 5.88 | 64.37 | 77.31 |
| 50 | 60.05 | 21.26 | 4.7 | 80.47 | 96.64 |
About Fuel Economy Units
MPG (US) uses the US gallon (3.785 L). MPG (UK/Imperial) uses the Imperial gallon (4.546 L), so the same vehicle will show a higher number in UK MPG.
km/L is common in parts of Asia and Latin America. L/100km is the standard in Europe, Canada, and Australia -- note that lower L/100km means better fuel economy (inverse relationship).
km/gallon variants multiply km/L by the respective gallon size, useful for quick cross-system comparisons.
Frequently Asked Questions
What is the Fuel Economy Converter?
The Fuel Economy Converter is a free online tool that convert between mpg (us), mpg (uk), km/l, l/100km, and km/gallon fuel economy units. It runs entirely in your browser with no installation or sign-up needed.
US vs UK MPG?
US uses 3.785L gallon, UK uses 4.546L gallon. Same vehicle shows higher MPG in UK gallons.
What about L/100km?
L/100km is an inverse measure — lower is better. The converter handles this correctly.
Free?
Yes — client-side, no registration.
Is my data safe with this tool?
Absolutely. The Fuel Economy Converter processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.
Does the Fuel Economy Converter work on mobile devices?
Yes, the Fuel Economy Converter is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.
Do I need to create an account to use this tool?
No account or registration is needed. Simply open the Fuel Economy Converter in your browser and start using it immediately. There are no sign-up walls or usage restrictions.
How do I use the Fuel Economy Converter?
Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.
Which browsers are supported?
The Fuel Economy Converter works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.
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About Fuel Economy Converter
Fuel Economy Converter is a free, browser-based tool in our Converter Tools collection. Everything runs locally on your device — no uploads, no sign-up, and your data stays private.