Fuel Average and Petrol Cost Calculator

Fuel average is distance divided by fuel: km per litre = kilometres driven ÷ litres used. If the odometer moved 450 km between two full tanks and the second fill took 32 litres, your average is 450 ÷ 32 = 14.06 km/l. To find the fuel cost of a trip, divide the distance by your average and multiply by the price per litre.

The tabs above do each of these: fuel average, trip cost and a monthly budget. The price box starts at the petrol price stored on 9 October 2026 (Rs 398.96 a litre). Prices change several times a month, so type in the price you paid or the one on the pump today.

Petrol and diesel price in Pakistan

Prices per litre stored in the calculator. Type the price on the pump if it has changed:

The government now revises petrol and diesel prices several times a month under a daily pricing mechanism linked to international prices, instead of once a fortnight.

How to calculate fuel average

The full-tank method is the most reliable way to check your car's or motorcycle's average. The fuel gauge is not accurate enough, so use the pump.

1. Fill the tank until the pump clicks off. Note the odometer, or reset the trip meter.
2. Drive normally for at least 150 km in a car or 100 km on a bike.
3. Fill up to the brim again at the same pump if you can. Note the litres and the odometer.
4. Divide the kilometres driven by the litres of the second fill.

Example: the odometer went from 45,200 to 45,650 km, and the tank took 32 litres.

Repeat it over two or three fills and take the total kilometres over the total litres; one tank can mislead if you spent a day in traffic.

When you only know the rupees

Most people buy fuel by amount: "Rs 2,000 ka petrol". Divide the rupees by the price per litre to get the litres, then divide the distance by the litres. If a motorcycle ran 240 km on Rs 2,000 of petrol, fuel cost Rs 2,000 ÷ 240 = Rs 8.33 per km whatever the price, and its average is 240 ÷ (2,000 ÷ the price per litre). Enter the rupees paid in the optional box of the fuel average tab to get the cost per km. This only works if you fill to the same level each time.

How to calculate petrol cost for a trip

Fuel cost = distance ÷ average × price per litre.

Example: 380 km each way, return, in a car that averages 14 km/l.

Split between four friends, that is Rs 5,414 each. On a motorway, add the toll with the motorway toll tax calculator: the M-2 return toll for a car is Rs 2,860.

Plan the stops

For a long trip, divide your tank size by your average to see how far a full tank goes, and keep about a tenth in reserve. A 37 litre tank at 13 km/l covers about 433 km with 10% kept back, so a 760 km return trip from a full tank needs one fill-up on the way.

Petrol cost per km and per 1,000 km by average

At the petrol price stored in the calculator:

Your own figure, measured with a full tank, is the one to use for budgeting.

Petrol cost for common distances

One-way petrol cost for a few averages:

km per litre to litres per 100 km

Pakistani drivers talk in km per litre; car makers and foreign reviews often give litres per 100 km. Litres per 100 km = 100 ÷ km per litre.

The last column is British miles per imperial gallon (1 km/l = 2.825 mpg), which you may see on imported car brochures.

Monthly fuel budget

Multiply your daily distance by the number of days you drive, then work out the fuel as above. Driving 40 km a day for 26 days is 1,040 km a month. At 14 km/l that is 74.3 litres, or Rs 29,637 a month at Rs 398.96 a litre, and about Rs 355,644 a year.

Why your average is lower than the brochure

Makers' figures come from standard lab tests at steady speeds. Real averages fall with short trips, stop-start traffic, air conditioning, low tyre pressure, extra load and idling. Motorway driving at a steady 100 to 110 km/h usually gives a car's best figure. A sudden drop on a route you drive often is worth a check of tyre pressure and the air filter.

On the Lahore to Islamabad motorway, add the M-2 toll to the fuel cost for the full trip cost.

Fuel questions