Free Fuel Economy Converter – MPG, km/L & L/100km

Some units measure distance per fuel (MPG, km/L) where higher is better, while L/100km measures fuel per distance where lower is better. These are inversely related, so converting between them requires reciprocal math, which the tool handles automatically.

The US gallon (about 3.785 L) is smaller than the UK imperial gallon (about 4.546 L), so the same car shows a higher MPG figure in UK units. The converter separates the two so you compare like with like.

Kisi bhi unit ke box mein value type karo — jaise MPG, km/l ya L/100km — aur baaki units turant update ho jayengi. Car ki mileage compare karne ke liye useful hai. Sab browser mein hota hai.

Enter a value in the km/L field and the MPG result updates instantly. The converter multiplies by the correct factor for US or UK gallons, so you get an accurate miles-per-gallon figure.

Yes. After the page loads, all calculations run locally in your browser, so the converter keeps working without an internet connection and never contacts a server.

Use whichever unit you are most familiar with, but be consistent. L/100km is common in Europe and is intuitive because lower is better, while MPG and km/L are higher-is-better. The converter lets you standardise on one.

Yes. Enter the efficiency you actually observe in your usual unit, and the converter shows it in the others, so you can compare your real mileage with a manufacturer's quoted figure.

Yes. Everything is processed in your browser. No value you enter is uploaded, logged, or shared, so your data stays entirely on your own device.