Fuel Cost Calculator
Trip fuel needed, cost & per-person split.
100% private — runs in your browser, nothing is uploaded.
Fuel needed
32.00 liters
Total fuel cost
$51.20
Cost per km
$0.13
Fuel only — tolls, wear and parking not included. Calculated locally in your browser.
How to use the Fuel Cost Calculator
- 1Choose units
km with L/100km, or miles with MPG.
- 2Enter the distance
One-way or round trip — your choice, just be consistent.
- 3Add efficiency and price
Your car's consumption and the local fuel price.
- 4Split if sharing
Set the number of people to see the per-person cost.
Examples
| Input | Output |
|---|---|
400 km, 8 L/100km, $1.60/L | 32 L · $51.20 total |
300 mi, 30 MPG, $3.50/gal | 10 gal · $35.00 total |
Know the fuel cost before you drive
This fuel cost calculatorturns three numbers you already know — trip distance, your car's consumption and the local fuel price — into the liters or gallons you'll burn and what they'll cost. It works in metric (km, L/100km) and US units (miles, MPG), and splits the total across passengers for fair cost-sharing on road trips.
Metric and MPG, both done right
The two systems measure efficiency in opposite directions, which is why mental math between them goes wrong: L/100km is fuel per distance, MPG is distance per fuel. The calculator applies the correct formula for whichever system you pick, so 8 L/100km over 400 km correctly comes out as 32 liters — not the 50 a mixed-up formula would give.
Budget trips and carpools fairly
Enter the passenger count and everyone sees the same per-person figure — no awkward estimates at the gas station. For the money side of driving, pair this with the percentage calculator for price changes or the unit converter to translate distances between km and miles.
Frequently Asked Questions
How do I calculate fuel cost for a trip?
Work out the fuel needed, then multiply by the price. Metric: distance ÷ 100 × L/100km. US: distance ÷ MPG. A 400 km trip at 8 L/100km uses 32 liters — at $1.60/L that's $51.20.
What's the difference between L/100km and MPG?
L/100km measures fuel used per distance (lower is better); MPG measures distance per fuel (higher is better). This tool supports both — pick the unit system your car's figures use.
Where do I find my car's fuel efficiency?
Check the trip computer, the owner's manual, or fueleconomy-style ratings for your model. Real-world figures are usually 10–20% worse than official ones, so round pessimistically for budgeting.
How does the per-person split work?
Enter how many people share the ride and the total fuel cost is divided evenly — handy for road trips and carpooling. With one person, the third card shows cost per km or mile instead.
Does this include tolls and wear?
No — it's fuel only. For a fuller trip budget, add tolls, parking, and something for maintenance; many organizations reckon total driving cost at roughly double the fuel cost.
Is my data uploaded?
No. Everything is calculated locally in your browser.