Trip Fuel Cost & Petrol Mileage Calculator
Plan your travel budget and estimate fuel expenses accurately for weekend getaways, long road trips, or office commutes.
How it works
The calculator divides your trip distance by your vehicle's real-world fuel economy to compute total litres of petrol, diesel, or CNG required, and multiplies it by local fuel rates.
Formula
Fuel Needed = (Distance / Mileage), Total Cost = Fuel Needed × Price per Litre
Divides total journey distance by fuel economy to find litres needed, then multiplies by current fuel rate.
| Symbol | Variable | Unit | Description |
|---|---|---|---|
| Distance | Total journey distance | km | |
| Mileage | Vehicle fuel efficiency | km/l | |
| Price | Fuel cost per litre | ₹/l |
Worked example
350 km road trip in a 15 km/l car at ₹102/litre petrol
- Distance:
- 350 km
- Mileage:
- 15 km/l
- Fuel Price:
- ₹102/l
Fuel Needed = 350 / 15 = 23.33 litres. Total Trip Cost = 23.33 × ₹102 = ₹2,380. Running cost is ₹6.80 per kilometer.
Limitations
Does not include toll plaza fees, highway parking charges, or vehicle depreciation.
Frequently asked questions
How do I calculate real-world mileage of my vehicle?
Use the tank-to-tank method: Fill your fuel tank to auto-cut, reset the trip meter to 0, drive until half-tank, refill to full, and divide kilometers traveled on the trip meter by litres filled.
How can I improve my vehicle's fuel efficiency on highways?
Maintain optimal tyre pressure, use cruise control between 80-90 km/h, avoid rapid acceleration, and minimize roof luggage drag.
Does AC reduce car fuel mileage?
Yes, running the air conditioner continuously in city traffic can reduce fuel efficiency by 5% to 15%. On highways at high speeds, AC is often more aerodynamic than open windows.
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Last reviewed: 2026-08-22.