Trip costs
How to calculate the fuel cost of a trip.
The fuel cost of a trip is the distance divided by 100, times your car’s consumption in litres per 100 km, times the price per litre: km ÷ 100 × L/100 km × PKR per litre.
Four steps
How do you work out what a drive costs?
01
Find the distance
Note the trip distance in kilometres, from your maps app or odometer.
02
Find your car's consumption
Use your car's fuel consumption in litres per 100 km. Your trip computer may show it; in stop-and-go city traffic it is usually higher than the official figure.
03
Work out the litres
Divide the distance by 100 and multiply by the consumption: litres = km ÷ 100 × L/100 km.
04
Multiply by the fuel price
Multiply the litres by the price per litre. From 21 October 2026, petrol is PKR 382.02 per litre.
The price changes regularly. The current petrol and diesel prices, with their effective dates and sources, are on Pakistan fuel prices.
Worked examples
What does a daily commute cost? Two worked examples
These are examples, not typical figures. Prices are petrol at PKR 382.02 per litre, effective 21 October 2026.
Lahore: 15 km each way, 8 L/100 km
Example commute
Lahore- Distance15 km × 2, a day
- 30 km
- Fuel used30 ÷ 100 × 8
- 2.4 L
Fuel cost a day
PKR 917
2.4 L × PKR 382.02 · PKR 4,584 for a five-day week
Karachi: 20 km each way, 7 L/100 km
Example commute
Karachi- Distance20 km × 2, a day
- 40 km
- Fuel used40 ÷ 100 × 7
- 2.8 L
Fuel cost a day
PKR 1,070
2.8 L × PKR 382.02 · PKR 5,348 for a five-day week
Petrol at PKR 382.02 per litre, effective 21 October 2026.
Source: OGRA notice via Guardian AI backend, 21 Oct 2026. As of 21 October 2026.
Calculator
Trip cost calculator
Change the numbers to match your drive. Prices are the ones effective 21 October 2026.
- Fuel
- PKR 917
- 2.4 L
- Total
- PKR 917
The result is an estimate. Real consumption depends on traffic, speed, air conditioning and how you drive.
In the app
Can an app work out the cost of every trip?
Yes. Guardian AI estimates the fuel each trip used and prices it at the official petrol price, so you see the estimated cost in rupees when you park, with no maths and no receipts.
It is an estimate, not your exact spend: your car’s real consumption will differ from trip to trip.
FAQ
Questions, answered.
What is the formula for fuel cost per trip?
Fuel cost = distance (km) ÷ 100 × consumption (L/100 km) × price per litre (PKR).
How much does a 30 km round trip cost in petrol?
About PKR 917 for a car using 8 L/100 km, at the latest notified petrol price of PKR 382.02 per litre (effective 21 October 2026). A car using 6 L/100 km would spend about PKR 688.
Why is my real fuel cost different from the calculation?
Consumption changes with traffic, speed, air conditioning, load and how you accelerate and brake. Stop-and-go traffic and hard acceleration use more fuel than the figure in the brochure, so any per-trip cost is an estimate.
Does Guardian AI calculate this for me?
Yes. Guardian AI estimates the fuel each trip used and prices it at the official petrol price, and shows the estimated cost in rupees when you park. It is an estimate, not your exact spend.
Free on iPhone and Android
Your trip cost, after every drive.
Estimated fuel cost in rupees after every trip, with the litres behind it.
