Fuel Cost Calculator
Every kilometre has a price tag, and ignoring it is how commute budgets swell. The arithmetic is two steps — distance divided by mileage gives litres, litres times the pump price gives rupees — but doing it before a trip turns 'fuel is expensive' into a number you can plan around. This calculator answers three questions: what the drive costs, how many litres the tank must deliver, and what each kilometre charges.
Enter values
Results
- Total fuel cost
- ₹1,716.67
- Fuel needed
- 16.67 litres
- Cost per km
- ₹5.72
How is the Fuel Cost calculated?
Enter the distance you plan to cover, your vehicle's real-world mileage in kilometres per litre, and the current pump price per litre in rupees. The calculator divides distance by mileage for the litres required, multiplies by price for the trip's total, and divides back by distance for the per-kilometre rate. If you do not know your mileage, measure one full tank next door at the mileage calculator and bring the number here.
Formula
litres = distance (km) ÷ mileage (km/L) total cost = litres × price per litre cost per km = price per litre ÷ mileage The per-kilometre figure needs no distance at all: at ₹103 per litre and 18 km/L, every kilometre costs 103 ÷ 18 ≈ ₹5.72.
Example
Distance: 300 km · Mileage: 18 km/L · Fuel price: ₹103 per litre Litres needed = 300 ÷ 18 ≈ 16.67 litres Total fuel cost = 16.67 × 103 ≈ ₹1,716.67 Cost per km = 1,716.67 ÷ 300 ≈ ₹5.72 A 120 km weekend ride at 20 km/L and ₹105 per litre needs exactly 6 litres — ₹630 total, ₹5.25 a kilometre, or ₹2,625 for a 500 km commuting month.
Things to remember
Pump prices move often, so refresh the input rather than remembering it. The per-kilometre result is the keeper: multiply it by monthly distance for a budget, compare it against a cab or train pass, and re-run when mileage drops — a car falling from 18 to 15 km/L raises every kilometre's cost by a fifth.
Frequently Asked Questions
How do I calculate the fuel cost for a road trip?
Divide the trip distance by your vehicle's km-per-litre mileage to get the litres required, then multiply by the price per litre. A 300 km trip at 18 km/L needs 16.67 litres, which at ₹103 a litre costs about ₹1,716.67 — the calculator does both steps in one pass.
How much does it cost per kilometre to run a car?
Fuel alone, at ₹103 per litre and 18 km/L, costs about ₹5.72 a kilometre. Add servicing, insurance, tyres and depreciation for the true ownership cost, which for a typical hatchback can roughly double the fuel-only figure — useful context before comparing against cab fares.
How do I find my vehicle's real mileage?
Use the full-to-full method: fill completely, note the odometer, drive a mix of city and highway, refill fully and divide the distance covered by the litres this second fill takes. Enter that km/L figure here rather than the brochure number, which is measured on a lab cycle most Indian roads never reproduce.
Does higher petrol price or lower mileage hurt more?
They multiply, so both bite equally per percent: a 10% price rise and a 10% mileage drop each add 10% to the per-kilometre cost, and together they add about 21%. That is why a small car's mileage advantage compounds into real savings the more you drive.
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