Annual Petrol Calculator

1. Enter a representative daily distance and choose kilometres or miles.
2. Select a vehicle and enter measured fuel efficiency in km/L, L/100 km, US MPG or Imperial MPG.
3. Enter the petrol price in the matching litre or gallon unit and select a currency.
4. Review daily fuel use, the 365-day annual projection, cost per distance and shorter budget periods.
5. Adjust the annual result to your actual driving days with the formula below.

The calculator uses your inputs in the browser. It does not fetch live pump prices or exchange rates.

Suppose a car travels 40 km on 240 days per year, returns 12 km/L and petrol costs PKR 280 per litre.

This is an illustrative fuel-only estimate. Actual distance, mileage and prices can change during the year.

Petrol-price range

Recalculate with a lower, current and higher price chosen by you. The difference shows budget sensitivity; it is not a fuel-price forecast.

Real fuel efficiency

Use mileage measured across several refills. Traffic, idling, short cold-engine journeys, speed, hills, tyre pressure, load, towing, air conditioning and maintenance can change consumption.

Seasonal travel

If travel changes across the year, calculate separate periods - for example, school-term commuting, holiday travel or a winter route - and add their results. Avoid applying one unusually busy month to all twelve months.

Practical budget review

Compare estimates with odometer readings and receipts during the year. Update distance, mileage or price when evidence changes. Smooth driving, sensible route planning, correct tyre pressure and removing unnecessary load may reduce avoidable consumption, but no fixed saving is guaranteed.

The calculator applies the published formulas and exact conversion constants above, keeps unrounded intermediate values, and formats results for readability. Read the petrol expense formula guide and calculation methodology. Last reviewed: 3 August 2026.