Fuel Cost Calculator
Estimate trip fuel cost from distance, mileage & price.
Work out the fuel cost of any trip from the distance, your vehicle’s mileage (km per litre) and the price per litre. Switch to round trip to double the distance, or split the cost across a carpool. Fuel used = distance ÷ mileage; cost = fuel used × price. Works for petrol, diesel and CNG. Runs fully in your browser — nothing is uploaded.
How to use Fuel Cost Calculator
Pick fuel and trip type
Choose petrol or diesel and select one way or round trip so this free online fuel cost calculator loads a typical pump price and the right distance.
Enter trip distance
Type the trip distance in kilometres; for a round trip the calculator automatically doubles it before working out the total fuel needed.
Enter fuel efficiency
Add your vehicle's real-world mileage in km per litre, the key input that determines how many litres your journey actually consumes.
Set the fuel price
Edit the per-litre petrol or diesel price to match your local rate so the estimated fuel cost reflects current pump prices instantly.
Read total cost
Instantly see total fuel cost, litres used, cost per kilometre and the per-person share, with a donut chart splitting the carpool cost.
Share the estimate
Use the share button to copy a link that reopens this fuel cost calculator with your fuel type, distance, mileage, price and split preserved.
Frequently asked questions
What is fuel efficiency (mileage)?
It’s how far your vehicle travels on one litre of fuel — for example 18 km/L. The higher the figure, the less fuel a trip uses. Use your real-world average for the best estimate.
Does it work for petrol, diesel and CNG?
Yes — the maths is the same. Just enter the right price per litre (or per kg for CNG) and your vehicle’s efficiency in the matching unit.
How does the carpool split work?
Set ‘split between people’ above 1 and the total cost is divided equally — handy for sharing a commute or trip fairly.
How do I calculate the fuel cost of a trip?
Use the fuel cost formula: divide the trip distance by your vehicle’s mileage to get litres used, then multiply by the price per litre. This fuel cost calculator does it instantly — for example, 100 km at 18 km/L and ₹105/L works out to about ₹583.
How do I estimate petrol or diesel cost for a road trip?
Enter the total distance, your real-world mileage and the current petrol or diesel price, then switch on round trip to double the distance. The calculator returns the total fuel cost, cost per km and the per-person share for a carpool.
How can I reduce my fuel cost per kilometre?
Improve your mileage with steady driving, correct tyre pressure and lighter loads, plan shorter routes, and carpool to split the cost. Better fuel efficiency directly lowers the cost per km this calculator shows.
Is my data sent anywhere?
No. Everything is calculated in your browser with JavaScript — nothing you enter is uploaded.
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