CalcPenguin

Fuel Cost Calculator

Work out the petrol or diesel cost of a trip from the distance, your car's mileage and the price per litre, and split it between passengers.

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km
km/l

Kilometres per litre. 8 L/100 km is 12.5 km/l.

PKR
people

Fuel cost

Rs 8,392

Fuel used
31.7 litres
Cost per km
Rs 22

Driving 380 km at 12 km/l uses about 31.7 litres, costing Rs 8,391.67.

How it's worked out

  1. Distance380 km
  2. Fuel used380 km ÷ 12 km/l31.67 litres
  3. Cost31.67 litres × Rs 265.00Rs 8,391.67
  • Real mileage drops with traffic, air-conditioning and high speeds. Tolls are not included.

The formula

Fuel cost = distance ÷ km per litre × price per litre

Worked example

A Lahore to Islamabad return trip of about 760 km in a car doing 12 km per litre uses 760 ÷ 12 = 63.3 litres. At Rs 265 a litre that's about Rs 16,783, or about Rs 4,196 each for four people.

Questions people ask

How do I calculate fuel cost for a trip?

Divide the distance by your car's kilometres per litre to get the litres used, then multiply by the price per litre.

My car shows litres per 100 km. How do I convert?

Divide 100 by it: 8 L/100 km is 12.5 km per litre. The unit converter does this for miles per gallon too.

Why is my real fuel cost higher?

City traffic, air-conditioning, heavy loads and high speeds all cut mileage below the official figure.

Formula and rules last checked 25 October 2026Written and tested by the CalcPenguin teamReport a problem