Fuel Cost & Efficiency Calculator
Enter your fuel economy and fuel price to estimate cost per km and per 100 km. Supports L/100km and MPG.
Enter your fuel economy.
Frequently asked questions
How do I convert L/100km to MPG?
Divide 235.215 by the L/100km value to get US MPG. Lower L/100km is better fuel economy; higher MPG is better. Canada officially reports litres per 100 km.
Why does fuel cost matter per km?
Multiplying your L/100km by the price per litre gives cost per 100 km, then divided by 100 for cost per km. It helps compare vehicles or estimate a trip's fuel expense.
Legal & Accuracy Notice: Estimation only based on the inputs you provide. Real fuel economy varies with driving conditions, vehicle, and fuel price. Not advice. Runs locally in your browser.