Fuel Economy Calculator
MPG, km/L and L/100km from distance and fuel used.
km
L
Fuel economy
7.62L/100km
km per litre
13.13km/L
MPG (US)
30.87mpg
MPG (UK)
37.08mpg
ShowHide the working
- 1L/100km = 32 ÷ 420 × 100 = 7.62
- 2km/L = 420 ÷ 32 = 13.13
Formula
L/100km = litres ÷ km × 100How it works
Converts a distance and fuel used into economy figures in every common unit.
Example
420 km on 32 L is 7.62 L/100km, or 30.9 US mpg.
About the Fuel Economy Calculator
MPG, km/L and L/100km from distance and fuel used. It sits in the Auto & Travel section of NWS Calc, a free collection of calculators that run entirely in your browser. There is no signup, no paywall and no tracking — open the page, enter your numbers, get an answer.
Frequently asked questions
- Is the Fuel Economy Calculator free to use?
- Yes. Every calculator on NWS Calc is completely free, with no signup, no usage limits and no ads.
- Does my data leave my device?
- No. The Fuel Economy Calculator runs entirely in your browser using JavaScript. Nothing you type is uploaded, logged or stored on a server.
- Can I use the Fuel Economy Calculator on my phone?
- Yes. The page is fully responsive and works in any modern mobile or desktop browser — there is nothing to install.
- What else is in Auto & Travel?
- Fuel cost, mileage, trip time and vehicle running costs. You can browse the full Auto & Travel category for related calculators.