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Car and fuel

EV Charging Cost Calculator

Find out what it costs to charge an electric car at home or on a fast charger, how much range it adds, how long it takes, and how the cost per km compares with petrol.

Rules last checked 25 October 2026Every step shown

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kWh
%
%
PKR
%

Some energy is lost as heat while charging, typically 5% to 15%.

km per kWh
kW

7.4 kW is a typical home wall charger; public fast chargers are 50 kW and up.

PKR
km/l

Cost of this charge

Rs 2,400

Range added
216 km
Cost per km
Rs 11.11 vs Rs 20.38 for petrol
Charging time
5 h 24 min

Charging from 20% to 80% costs about Rs 2,400 and adds 216 km: Rs 11.11 a km, against Rs 20.38 for a petrol car.

How it's worked out

  1. Energy into the battery60 kWh × 60%36 kWh
  2. Energy from the grid÷ (1 − 10% losses)40 kWh
  3. Cost40 × Rs 60Rs 2,400
  • Fast chargers often charge more per kWh than home electricity, and charging slows above about 80%.

The working

Energy into battery = battery kWh × (target % − starting %)

Energy from the grid = energy into battery ÷ (1 − losses)

Cost = grid energy × price per kWh

Example

A 60 kWh car charged from 20% to 80% takes in 36 kWh. With 10% losses, the meter shows 40 kWh, costing Rs 2,400 at Rs 60 a unit. At 6 km per kWh that adds 216 km, about Rs 11 a km, against about Rs 20 a km for a petrol car doing 13 km/l at Rs 265 a litre.

Questions people ask

How much does it cost to charge an electric car?

Battery size × the share you charge × the electricity price, plus a little for losses. Charging 20% to 80% of a 60 kWh battery at Rs 60 a unit costs about Rs 2,400.

Why include charging losses?

Some energy turns into heat in the charger and battery, so the meter records more than the battery stores. Losses are usually 5% to 15%, higher on slow 3-pin charging.

How long does it take to charge?

Roughly the energy drawn divided by the charger's power. Fast chargers slow down above about 80%, so the last part takes longer than this estimate.

Is an EV cheaper to run than petrol?

Usually per km, especially on home electricity. Compare the two cost-per-km figures the calculator shows using your own prices.

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