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PakeWheels

Free calculator

Petrol vs Electric Cost Calculator

Compare the running cost of your petrol or diesel car, motorcycle, scooter or rickshaw with an electric one — cost per KM, monthly and yearly savings, long-term ownership cost and break-even, in Pakistani Rupees.

What do you drive?
Petrol or diesel vehicle

Your fuel vehicle

Rs. / litre

Enter today’s price at your pump.

KM / litre

Pre-filled with a typical example for this vehicle type — use your own vehicle’s average.

Electric vehicle

Electric alternative

kWh / 100 KM

Real-world figure; typically higher with heavy traffic, high speed or air-conditioning.

Rs. / unit

Your per-unit rate including taxes — check your bill. EV charging can push you into a higher slab.

Driving distance

How far do you drive?

KM
KM
KM

The same distance is used for both vehicles. A year is 365 days; a month is 1/12 of a year.

Charging

Where will you charge?

Public 0%

Most owners charge mainly at home; public fast charging usually costs more per unit.

Rs. / unit

The per-unit price at the charging station you use.

%

Energy lost between the socket and the battery. 10% is a common estimate.

Rs.
Rs.
Rs. / year

Oil changes, filters, tuning, plugs, clutch…

Rs. / year

Tyres, brakes, coolant, servicing…

years
Rs.

Only if you expect to replace the battery while you own the EV.

years

Results are estimates. Actual costs depend on driving conditions, vehicle condition, charging efficiency and your electricity tariff.

Methodology

How we calculate fuel vs electric cost

Every number on your results page comes from these formulas and your inputs. Nothing is hidden and no prices are hard-coded.

Fuel cost per KM
Fuel price per litre ÷ fuel average (KM per litre)
Electricity used per KM
EV consumption (kWh per 100 KM) ÷ 100
Electricity from the grid per KM
Electricity used per KM ÷ (1 − charging loss %)
Average price per unit
Home % × home price + public % × public charging price
EV cost per KM
Grid electricity per KM × average price per unit
Savings
(Fuel cost per KM − EV cost per KM) × distance
Break-even
(EV price − fuel vehicle price) ÷ monthly running-cost saving

Assumptions

  • A year is 365 days and a month is one-twelfth of a year.
  • Prices stay the same over the ownership period (no inflation or fuel price changes).
  • Maintenance and battery costs are only included when you enter them.
  • Purchase prices are compared only when both are entered. Financing, insurance, registration and resale value are not included.
  • Break-even ignores battery replacement, which is shown separately in the ownership table.
  • Real consumption varies with driving style, traffic, speed, load, air-conditioning and weather.

Example

A car averaging 12 KM per litre with petrol at Rs. 250 costs Rs. 250 ÷ 12 = Rs. 20.83 per KM. An EV using 15 kWh per 100 KM, charged at home at Rs. 50 per unit with 10% charging loss, costs 0.15 ÷ 0.9 × 50 = Rs. 8.33 per KM — a saving of Rs. 12.50 per KM. Illustrative numbers only; use your own prices.

Calculator FAQs

How do I calculate petrol cost per KM?
Divide the petrol price per litre by your vehicle’s fuel average in KM per litre. For example, at Rs. 250 per litre and 12 KM per litre, petrol costs about Rs. 20.83 per KM.

How do I calculate electric vehicle cost per KM?
Divide the EV’s consumption in kWh per 100 KM by 100 to get units per KM, allow for charging losses, then multiply by your price per unit. The calculator does this using your home and public charging mix.

Where do I find my electricity price per unit?
Divide the total amount on your electricity bill (including taxes) by the units consumed, or use the slab rate shown on your bill. Adding EV charging can move your home into a higher slab, so check the rate for your expected monthly units.

What is charging loss?
Some electricity is lost as heat between the wall socket and the battery. A charging loss of around 10% is a common estimate for home charging; you can change it in the calculator.

Why does my EV use more energy than the brochure says?
Manufacturer figures are measured in standard test conditions. Heavy traffic, high speeds, air-conditioning, hills, heavy loads and hot weather all increase real-world consumption. Use a real-world kWh per 100 KM figure for the most accurate result.

Is my calculation saved?
Yes. Every result gets its own link that you can bookmark or share. If you create a free account, results from your browser are saved to “My calculations”.