What does this tool do?
The Fuel Cost Calculator instantly shows how much fuel a trip will burn and what it will cost. Enter your distance, consumption and price per liter; it suits daily commuters and anyone planning a road trip on a budget.
How to use it
- Enter your values into the fields.
- The result is calculated instantly.
- Read or copy the result.
Metric and imperial units
The tool supports two modes. In metric mode you enter distance in km and consumption in L/100km, and total fuel is found with 'distance × consumption / 100'. In imperial mode distance is in miles and consumption in mpg, with the result converted to liters. For example, 100 km at 8 L/100km with fuel at $1.50 gives 8 liters used and a $12 total. Switch modes instantly with the buttons.
Practical use cases
It is ideal for budgeting a holiday route in advance, comparing which of two itineraries is cheaper, or splitting the bill with carpool friends. Enter the current pump price to test different scenarios in seconds, then use the copy button to paste the result into your notes or a message. Every calculation runs live in your browser.
Frequently asked questions
Where do I find my L/100km figure?
Check your car's average-consumption display on the dashboard or the manufacturer's spec sheet. If you don't know it, you can also work it out from the kilometers driven and liters added between two fill-ups.
Why is the imperial result shown in liters?
Miles and mpg yield consumption in gallons; the tool multiplies by 3.785 to convert to liters, so the total cost stays consistent with the per-liter price you entered.
Is Fuel Cost Calculator free?
Yes. Fuel Cost Calculator and all 300+ tools on MagmaNex are completely free with no signup or account required.
Is my data safe?
Yes. Everything runs locally in your browser. The data you enter is never sent to a server, stored, or shared.
Does it work on mobile?
Yes. Fuel Cost Calculator works on phones, tablets and desktops — no app download needed.
🔒 Privacy: everything runs in your browser, your data is never sent to a server.