Petrol Expense Calculator is a free online toolkit for calculating the cost of petrol on any trip, in any vehicle, in any country. Every calculator on this site uses the same one-line formula — distance ÷ mileage × price — and applies it across kilometres, miles, km/L, MPG, L/100 km, litres, and US/UK gallons so the result you see matches the units you actually think in.
What we built
Calculators that share the same underlying math, so results stay consistent across tools:
- Petrol Expense Calculator — the universal calculator with a vehicle selector and currency auto-detection
- Bike Petrol Calculator — focused on motorcycles and 125cc commuter bikes
- A roadmap of vehicle-specific (scooter, car, truck), time-period (daily, monthly, annual, trip), and comparison (petrol vs diesel, petrol vs CNG) calculators rolling out in Phases 2 and 3
Who it's for
Daily commuters use it to budget monthly fuel spend and weigh route alternatives. Delivery riders on Foodpanda, Bykea, Cheetay, and Careem use it to size daily fuel cost against earnings. Ride-share drivers on Uber and Careem use it to understand cost per trip. Carpoolers use the carpool split to divide bills fairly.
What we don't do
We don't store your inputs, sell leads, or run ads against calculator results. Every calculator runs entirely in your browser — distance, mileage, and pricing never leave the page. We don't require an account, an email, or a phone number to use any tool.
How accurate is it?
The math is exact — distance, mileage, and price multiply out the way the formula says. Real-world variance comes from traffic, terrain, AC use, vehicle condition, tyre pressure, and driving style — typically ±10% on a daily commute. For business or fleet expense reporting, confirm against the previous month's actual fill-ups. Our full methodology is on the methodology page.
Get in touch
Spotted a bug, have a feature request, or want to suggest a new calculator? Hit the contact page.