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EV Charging Cost Calculator

Calculate how much it costs to charge your electric vehicle at home or public chargers and compare savings against a gasoline car.

Calculator Inputs

Live
Currency:
kWh
15 kWh120 kWh
%
0%80%
%
30%100%
₹
₹0.1₹50
Calculation Results
Total Cost to Charge
₹320
Adds 40 kWh into battery (with 90% efficiency)
Running Cost per km
₹1.33/km
Estimated Savings vs Petrol
₹1,480
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How to use the EV Charging Cost Calculator

  1. 1Enter your EV battery pack capacity in kWh (e.g. 50 to 80 kWh).
  2. 2Enter starting battery percentage and target charging percentage.
  3. 3Enter your home electricity tariff rate per kWh.
  4. 4View total cost to charge, cost per kilometer, and savings vs petrol.

How EV Charging is Calculated

Energy required is calculated from battery capacity and charge percentage, adjusted for charging efficiency losses (typically ~90%). Cost is computed using the electricity rate.

Mathematical Formula
Energy Needed (kWh) = [ Capacity × (Target% - Current%) / 100 ] / Efficiency Total Cost = Energy Needed × Electricity Rate per kWh
Formula Variables & Logic

Charging efficiency accounts for onboard charger heat and battery thermal management losses.

Worked Example: Charging a 60 kWh EV at Home
Sample Calculation
Scenario: Charging from 20% to 80% (60% top-up) on a 60 kWh battery at ₹8 (or $0.15) per kWh with 90% charging efficiency.
Step-by-step breakdown
  1. 1Net Battery Energy = 60 × 0.60 = 36 kWh
  2. 2Energy Drawn with Losses = 36 / 0.90 = 40.0 kWh
  3. 3Charging Cost = 40 × $0.15 = $6.00 (or ₹320)
  4. 4Driving 240 km on that charge yields a running cost of ~$0.025/km.
Estimated Result
Total charge cost is $6.00 (or ₹320), saving over 70% compared to gasoline.

What affects EV Charging results

  • Time-of-Use (TOU) off-peak electricity tariffs.
  • Level 2 home charging vs high-speed Level 3 DC commercial fast charger rates.
  • Winter battery preconditioning and cabin heating loads.
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Frequently Asked Questions

Is it cheaper to charge an EV at home than public chargers?

Yes, residential off-peak charging is typically 3 to 5 times cheaper than commercial DC fast charging networks.

Why should I only charge to 80% for daily driving?

Limiting daily charging to 80% protects lithium-ion battery health, preserves cycle life, and avoids slower charging speeds past 80%.

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