How to Calculate Trip Fuel Cost – Petrol Budget for Road Trips
A road trip across India — from Mumbai to Goa, Delhi to Jaipur, or Bangalore to Ooty — is one of life's great pleasures. But unexpected fuel costs can quickly trip up your budget. This step-by-step guide shows you exactly how to calculate petrol expenses for any road trip before you leave home.
Why Calculate Fuel Cost Before a Trip?
Knowing your trip fuel cost allows you to set an accurate travel budget, split costs fairly among carpool partners, decide whether to drive or take a train/flight, and plan fuel stops along the route. A precise estimate prevents the common mistake of under-budgeting and running short of cash mid-trip.
The Trip Fuel Cost Formula
Total Fuel Cost = Fuel Litres × Current Fuel Price (₹/litre)
Cost Per Person = Total Fuel Cost / Number of People
Step-by-Step: Mumbai to Goa Road Trip
Distance: 590 km one-way (1,180 km round trip). Car mileage: 14 km/l. Petrol price: ₹106/litre. Passengers: 4.
- One-way fuel = 590 / 14 = 42.14 litres
- One-way cost = 42.14 × ₹106 = ₹4,467
- Round trip cost = ₹4,467 × 2 = ₹8,934
- Per person (4 people) = ₹8,934 / 4 = ₹2,234/person
Popular Indian Road Trips — Fuel Cost Estimates
| Route | Distance | Fuel Cost (14km/l, ₹106/L) |
|---|---|---|
| Mumbai → Goa | 590 km | ₹4,467 one-way |
| Delhi → Jaipur | 280 km | ₹2,120 one-way |
| Bangalore → Ooty | 265 km | ₹2,006 one-way |
| Mumbai → Pune | 150 km | ₹1,136 one-way |
| Chennai → Pondicherry | 155 km | ₹1,174 one-way |
Additional Trip Cost Factors
Don't forget to budget for:
- Tolls: Budget ₹2-5/km on national highways and expressways.
- Parking: Hill stations and tourist spots often charge ₹50-200/day.
- Fuel price variation: Petrol is cheaper in some states (MP, HP) and pricier in others (Maharashtra, Rajasthan).
- Real-world mileage drop: AC usage, hill climbs, and traffic reduce mileage by 10-20% from highway estimates.
Frequently Asked Questions
How do I know my car's actual mileage?
Fill tank completely, reset trip meter to zero, drive normally until the fuel warning light comes on, then fill the tank again. Note the fuel refuelled and km on the trip meter. Mileage = km / litres refuelled.
Should I add AC usage to fuel cost estimate?
Yes. AC reduces mileage by 10-15% in city driving and 5-10% on highways. If you'll be driving in summer heat with AC on, use 90% of your rated mileage in calculations.
How do I split fuel costs fairly for carpooling?
Total fuel cost / number of passengers (including driver) = equal split. If the driver is going anyway, some groups exclude the driver from payment. Agree on the method before the trip!
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