⛽️ Vehicle Calculator
Fuel Cost Calculator
Calculate trip fuel cost, fuel needed, cost per km, and monthly expenses — for petrol, diesel, CNG or electric vehicles.
Units
Trip details
km
trips
Vehicle details
km/l
Fuel price
₹
Price level — Petrol
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Trip fuel cost
--Litres needed
--Cost per km
--Per 100 km
--Full tank cost
--Per day
--Per week
--Per month
Efficiency rating
Based on mileage
Mileage comparison table
| Mileage | Fuel used | Trip cost | Monthly |
|---|
💡 Fuel saving tips
Drive at 60–80 km/h — the most fuel-efficient speed range for most petrol cars.
Keep tyre pressure at recommended levels — under-inflation increases fuel use by up to 3%.
Avoid idling for more than 30 seconds — restarting uses less fuel than idling.
Accelerate smoothly and anticipate braking — aggressive driving cuts mileage by up to 30%.
Remove unnecessary weight — every 50 kg extra reduces mileage by about 2%.
How is fuel cost calculated?
The calculation divides your distance by mileage to find litres needed, then multiplies by fuel price.
Fuel needed = Distance ÷ Mileage (km/l)
Trip cost = Fuel needed × Price per litre
Cost per km = Fuel price ÷ Mileage
Trip cost = Fuel needed × Price per litre
Cost per km = Fuel price ÷ Mileage
🚵️ Two-wheelers
Motorcycles get 40–60 km/l — very cost-efficient for city commuting.
🚗 Cars
Hatchbacks get 15–20 km/l, sedans 12–18 km/l, SUVs 8–14 km/l depending on engine.
🛣️ Highway vs city
Highway driving is 15–25% more efficient due to steady speeds and fewer stops.
💨 CNG advantage
CNG costs roughly 40–60% less per km than petrol with a similar mileage vehicle.
Frequently asked questions
How do I calculate fuel cost for a trip?
Fuel Cost = (Distance ÷ Mileage) × Price per litre. For a 300 km trip, 15 km/l car, ₹102/l petrol: (300 ÷ 15) × 102 = ₹2,040.
How do I find my car's mileage?
Fill your tank completely and note the odometer. Drive normally. Refuel completely: Mileage = km driven ÷ litres used at second refuel.
How much does a 500 km road trip cost?
For 15 km/l at ₹102/l: (500 ÷ 15) × 102 = ₹3,400. For a 45 km/l motorcycle: ₹1,133. Enter your figures above for exact results.
What is the most fuel-efficient speed?
60–80 km/h is most efficient for most petrol vehicles. Above 100 km/h, aerodynamic drag rises sharply — every 10 km/h above 80 can cut mileage by 5–10%.
Is CNG cheaper than petrol per km?
Yes — significantly. CNG at ₹85/kg giving 25 km/kg = ₹3.4/km. Petrol at ₹102/l with 15 kmpl = ₹6.8/km. CNG is about 50% cheaper per km.
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