What is the Petrol Cost Calculator?
With petrol prices changing every fortnight, it helps to know what a trip or daily commute really costs. The petrol cost calculator works out litres used and total fuel cost from distance and your vehicle's mileage in km per litre.
Use it for Lahore–Islamabad trips, daily office commutes or to split costs with friends. To convert miles to kilometres first use KM to Miles Converter; to budget household bills too, try the Electricity Bill Calculator.
How to use the Petrol Cost Calculator
- Enter the distance in km.
- Enter your vehicle's mileage (km per litre).
- Enter today's petrol price per litre.
- Tick return trip or set trips per month.
- Read litres, total cost and cost per person.
Formula
Litres = distance ÷ mileage · Cost = litres × price per litre
Example
Lahore to Islamabad is about 375 km. A car giving 14 km/l uses 26.8 litres; at Rs 260 per litre that is about Rs 6,964 one way.
Typical mileage
| Vehicle | km per litre (approx.) |
|---|---|
| 70cc motorcycle | 50–60 |
| 125cc motorcycle | 40–45 |
| 660cc hatchback | 18–22 |
| 1000cc car | 15–18 |
| 1300cc sedan | 12–15 |
| 1800cc+ / SUV | 8–11 |
Save fuel
- Keep tyres at the right pressure.
- Drive smoothly and stay near 80–100 km/h on motorways.
- Avoid long idling with the AC on.
- Service the engine and air filter on time.
You may also need
People who use the Petrol Cost Calculator often need these related tools too:
- FBR Salary Tax Calculator 2026-27: Enter your monthly salary to see income tax per month and year, take-home pay and your tax slab under the FBR salaried rates for FY 2026-27.
- Zakat Calculator: Add cash, savings, gold, silver, business stock and money owed to you, subtract debts due, and see whether you meet the nisab and how much zakat to give.
Frequently asked questions
How do I calculate petrol cost for a trip?
Divide distance by mileage to get litres, then multiply by the price per litre.
How do I find my car's mileage?
Fill the tank, reset the trip meter, drive, then refill and divide km driven by litres added.
Does it work for diesel or CNG?
Yes. Enter the fuel price and the mileage for that fuel.
Can I split the cost with friends?
Yes, enter the number of passengers.
Can I calculate monthly fuel cost?
Yes, enter your trips per month.
Is the Petrol Cost Calculator free to use?
Yes. The Petrol Cost Calculator on Custom Converter is completely free, with no sign-up, no daily limit and no watermark.
Does the Petrol Cost Calculator work on mobile phones?
Yes. It is built mobile-first and works on Android phones, iPhones, tablets and computers in any modern browser, with no app to install.