TOOLOG TOOL

Fuel Economy Calculator | km/L, L/100km, and fuel cost at once

Calculate fuel economy in km/L from distance and fuel used, then check L/100km, total fuel cost, and cost per km in one place.

Auto/Cost
-Fuel economy (km/L)
-Fuel use per 100km
-Total fuel cost
-Fuel cost per km

Enter distance and fuel used to calculate fuel economy instantly.

When this fuel economy calculator is useful

After a trip or a refill, you may want to know your real fuel economy and how much that drive actually cost.

This tool lets you enter:

  • Distance traveled (km)
  • Fuel used (L)
  • Fuel price per liter (optional)

Then it instantly shows km/L, L/100km, total fuel cost, and fuel cost per km.

How it works

  1. Distance ÷ Fuel used = km/L
  2. 100 ÷ km/L = L/100km
  3. Fuel used × Price per liter = Total fuel cost
  4. Total fuel cost ÷ Distance = Cost per km

Example

  • Distance: 420km
  • Fuel used: 28L
  • Price per liter: 1,720 KRW

→ Fuel economy: 15.00 km/L
→ Fuel use per 100km: 6.67 L
→ Total fuel cost: 48,160 KRW
→ Fuel cost per km: about 115 KRW

Good companion tools

FAQ

Is a higher km/L better?

Yes. A higher km/L means your car travels farther with the same amount of fuel.

Is a lower L/100km better?

Yes. A lower L/100km means less fuel is needed to travel the same distance.

Why should I enter fuel price?

Adding fuel price helps you translate efficiency into real driving cost, including total fill cost and cost per km.

Related tools

Average Speed Calculator Enter distance and time to calculate average speed, pace per kilometer, and estimated 5K/10K times. Unit Converter Convert length, weight, and temperature units accurately on one screen. Percent Calculator Calculate percentages, ratios, and increase/decrease rates quickly in one place.