Work out how much fuel a trip will cost before you set off. In "Fuel cost" mode, enter the distance (km), fuel economy (km/L) and price per liter to get the total fuel cost, the liters used and the cost per km; add the number of people to also see the per-person split. In "Fuel economy" mode, enter the distance driven and the liters filled to calculate real-world fuel economy (km/L) and L/100km, and add the amount paid to also see the cost per km and the actual price per liter. The price defaults to ¥175/L as a rough guide for regular petrol — change it to the price you actually paid. Everything runs in your browser; the numbers you enter are never stored or uploaded.
How to use
- In "Fuel cost", enter the distance, fuel economy and price per liter (set the price to what you paid).
- Read the total fuel cost, liters used and cost per km. Add people to also get the per-person split.
- In "Fuel economy", enter distance and liters filled for real km/L. Add the amount paid for the price per liter and cost per km.
FAQ
How is the fuel cost calculated?
Distance ÷ fuel economy gives the liters used, which is multiplied by the price per liter to get the total cost. The per-person figure simply divides the total by the number of people.
How is fuel economy (km/L) calculated?
In "Fuel economy" mode it divides the distance driven since the last fill-up by the liters you just filled (distance ÷ liters). This suits the full-tank method of measuring real-world economy.
What is the ¥175/L default price?
It is a rough guide for regular petrol. Actual prices vary by region, time and station, so replace it with the figure from your fuel receipt.
Are the numbers I enter stored?
All calculation runs in your browser and nothing is sent to a server. Settings like fuel economy and price are saved only on your own device to make repeat use easier, and can be cleared with Reset.