How to Calculate Fuel Cost for a Trip
Whether you’re driving to Jaipur for a weekend getaway or commuting daily to office, knowing the exact fuel cost helps split expenses fairly and avoid budget surprises. The formula is simple — distance divided by mileage multiplied by fuel price — but adding round trips and multiple passengers can complicate things. Here’s how to get it right every time, with a real example.
The core fuel cost formula
Fuel cost depends on three numbers: the total distance you’ll drive (in km), your vehicle’s mileage (km per litre), and the current fuel price (₹ per litre). The calculation is:
Total cost = Fuel needed × Fuel price (₹/l)
Cost per person = Total cost ÷ Number of passengers
For round trips, simply double the one‑way distance before calculating.
Step-by-step: calculate your trip fuel cost
- Open the Fuel Cost Calculator tool.
- Enter the one‑way distance. Tick the Round Trip checkbox if you’ll return by the same route.
- Enter your vehicle’s mileage (e.g., 15 km/l for a petrol sedan) and the current fuel price (₹105/litre for petrol, for example).
- If sharing costs, enter the number of people splitting the bill. The tool shows fuel needed, total cost, cost per person, and cost per km.
- For daily commuters, scroll to the Monthly Commute section, enter working days and daily distance, and see your monthly fuel bill.
Worked example: Delhi to Jaipur
One‑way distance ≈ 280 km. Mileage = 15 km/l. Fuel price = ₹105/l. Fuel needed one way = 280 ÷ 15 = 18.67 litres. Total cost one way = 18.67 × 105 = ₹1,960. For a round trip with four friends sharing, total distance = 560 km, fuel needed = 560 ÷ 15 = 37.33 litres, total cost = ₹3,920. Cost per person = 3920 ÷ 4 = ₹980. Far cheaper than four train tickets!
Frequently Asked Questions
How accurate is the mileage figure?
Mileage varies with road conditions, AC usage, and driving style. For highway trips, use your car’s certified ARAI mileage minus 10–15%. For city driving, subtract 20–25%.
Should I include toll and parking costs?
Yes, the fuel cost calculator only covers fuel. Add tolls and parking separately to your total trip budget. Many navigation apps now display toll estimates.
Can I calculate for an electric vehicle (EV)?
Yes, but instead of mileage (km/l), use efficiency (km/kWh) and electricity cost per kWh. The formula remains the same: (distance ÷ efficiency) × cost per kWh.
Does the tool work for diesel vehicles?
Absolutely. Enter the vehicle’s diesel mileage and the diesel price per litre. The formula is fuel‑agnostic.
Is it free and private?
Yes — the tool runs entirely in your browser, free, with no sign‑up and nothing uploaded to a server.
Try the Fuel Cost Calculator