Fuel Cost Calculator
Compare running cost for daily commute, monthly usage or a road trip. Adjust distance, mileage and fuel prices to match your real vehicle usage.
Enter your travel details to compare fuel options.
Trip budget insight
Select Road Trip mode to estimate the one-time fuel budget for a journey.
How this calculator helps
This calculator is designed for real vehicle usage, not just a single fuel formula. You can use it for office travel, monthly running cost checks, or road trip planning. The values are editable, so you can adjust them to your city, vehicle and driving style.
Formula used:
Fuel or energy needed = Distance travelled ÷ Efficiency
Running cost = Fuel or energy needed × Price per unit
How to read the result
The cheapest option is useful to know, but it should not be the only factor. Petrol may suit lower usage, diesel may suit frequent highway travel, CNG may help city drivers, and EVs can be economical when charging is convenient.
What affects real fuel cost?
- Traffic and road conditions
- Driving style and acceleration habits
- Vehicle load and AC usage
- Actual mileage compared with brochure mileage
- Fuel price changes in your city
Frequently Asked Questions
How is fuel cost calculated?
Fuel cost is calculated by dividing the distance travelled by the vehicle mileage, then multiplying the result by the fuel price. For example, if your car gives 15 km/litre and you drive 150 km, the fuel required will be 10 litres.
Which is cheaper to run: petrol, diesel, CNG or EV?
The answer depends on your daily usage, driving conditions and local fuel prices. In many cases, EVs and CNG vehicles have lower running costs, while petrol vehicles may suit people with lower monthly travel.
Why does real-world mileage differ from company mileage?
Manufacturer mileage figures are tested under controlled conditions. Real-world mileage may be lower because of traffic, AC usage, road condition, driving style, tyre pressure and vehicle load.
Should I buy a diesel car for city driving?
Diesel vehicles are usually more beneficial for higher monthly driving or highway usage. For low city usage, petrol, CNG or EV options may sometimes make more practical sense depending on maintenance and fuel prices.
How accurate is this fuel cost calculator?
The calculator gives estimated values based on the numbers entered. Actual fuel cost can vary because of traffic, terrain, fuel quality, weather, driving habits and vehicle condition.
Can this calculator estimate road trip fuel expenses?
Yes. Use the Road Trip mode and enter the total travel distance. The calculator will estimate the approximate fuel or charging cost for the entire trip across different fuel types.
Are EVs always cheaper than petrol or diesel vehicles?
EV running costs are often lower, especially when charging at home. However, total ownership cost may also depend on battery replacement, charging access, electricity rates and purchase price.
What is considered good mileage for a car?
Mileage expectations vary by vehicle type. Many hatchbacks may give around 15–22 km/litre in practical conditions, while SUVs generally return lower mileage because of higher weight and engine size.
How can I reduce my monthly fuel expense?
Keeping tyre pressure correct, driving smoothly, reducing unnecessary idling and servicing the vehicle regularly can improve fuel efficiency and reduce overall running cost.
Can fuel prices significantly change yearly running cost?
Yes. Even a small increase in fuel price can noticeably affect yearly running cost for people who drive long distances regularly. That is why comparing fuel types before buying a vehicle can be useful.