EV Charging Cost Calculator

Estimate EV charging cost including battery top-up and charging losses. Enter your own values below to see estimated charging cost and check the method behind it.

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Your inputs

Change the example values to match your situation.

Your result

Let’s work it out.

Fill in your inputs and select Calculate.
Your result and breakdown will appear here.

How this calculator works

Grid energy = battery capacity × change in charge fraction ÷ charging efficiency. Cost = grid energy × tariff.

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What is EV Charging Cost Calculator?

EV Charging Cost Calculator helps you estimate EV charging cost including battery top-up and charging losses.

The main result is estimated charging cost, with a breakdown of energy from the socket and energy added to battery. The formula, example and assumptions below explain how to interpret it.

How to use EV Charging Cost Calculator

Use the example to get familiar with the form, then enter your own figures. Any rates in the example are illustrative. Check the field labels and units before calculating.

  1. Gather battery capacity (kWh), starting state of charge (%), target state of charge (%), charging efficiency (%) and electricity tariff (₹). Use values from the same situation or reporting period.
  2. Replace the example battery capacity with your own value, then complete the other fields. Check the displayed units.
  3. Select Calculate and read estimated charging cost with its result breakdown. Change one input and calculate again to compare a second scenario. Reset restores the original example.
  • Enter battery capacity in kWh, at least 0. Decimals are accepted.
  • Enter starting state of charge in %, at least 0 and at most 100. Decimals are accepted.
  • Enter target state of charge in %, at least 0 and at most 100. Decimals are accepted.
  • Enter charging efficiency in %, at least 0 and at most 100. Decimals are accepted.
  • Enter electricity tariff in ₹, at least 0. Decimals are accepted.

EV Charging Cost Calculator: a worked example

With the inputs below, the result is ₹266.67 (estimated charging cost). Follow the example, then replace these illustrative values with your own.

Example inputs and output
Input or outputExample value
Battery capacity (kWh)50 kWh
Starting state of charge (%)20 %
Target state of charge (%)80 %
Charging efficiency (%)90 %
Electricity tariff (₹)₹8
Estimated charging cost₹266.67
Energy from the socket33.333333 kWh
Energy added to battery30 kWh

Understanding the EV Charging Cost result

Read estimated charging cost alongside energy from the socket and energy added to battery. These describe different parts of the same calculation.

Displayed results use a readable number of decimal places. When checking a result by hand, keep extra precision until the last step. To compare scenarios, change one input at a time and keep the others fixed.

  • Example Energy from the socket: 33.333333 kWh
  • Example Energy added to battery: 30 kWh

EV Charging Cost Calculator: assumptions and common mistakes

A useful estimate starts with the right inputs. Check the following assumptions and limits before applying the result to your situation.

  • Use mileage from comparable driving conditions. A fuel-only comparison excludes financing, maintenance and resale unless those amounts are specifically entered.

For wider guidance, visit Bureau of Energy Efficiency. The formula and scope of this specific tool are stated on this page.

EV Charging Cost Calculator FAQs

What does EV Charging Cost Calculator calculate?

EV Charging Cost Calculator helps you estimate EV charging cost including battery top-up and charging losses. Its main output is estimated charging cost in ₹.

What inputs do I need for EV Charging Cost Calculator?

You need battery capacity (kWh), starting state of charge (%), target state of charge (%), charging efficiency (%) and electricity tariff (₹). Use the field labels and units to match your figures to the formula.

Which formula does EV Charging Cost Calculator use?

Grid energy = battery capacity × change in charge fraction ÷ charging efficiency. Cost = grid energy × tariff.

What is a worked example for EV Charging Cost Calculator?

Example inputs: Battery capacity: 50 kWh; Starting state of charge: 20 %; Target state of charge: 80 %; Charging efficiency: 90 %. Keep the remaining inputs as shown in the worked-example table. The result is ₹266.67 (estimated charging cost).

How should I enter battery capacity?

Enter battery capacity in kWh, at least 0. Decimals are accepted.

How do I choose starting state of charge?

Enter starting state of charge in %, at least 0 and at most 100. Decimals are accepted. The example uses 20 %; replace it if your circumstances differ.

How should I read estimated charging cost?

Read estimated charging cost alongside energy from the socket and energy added to battery. These describe different parts of the same calculation.

Why might my EV Charging Cost Calculator result differ from my records?

Use mileage from comparable driving conditions. A fuel-only comparison excludes financing, maintenance and resale unless those amounts are specifically entered. Differences in entered values, units or rounding can also change the comparison.

Can I compare two scenarios in EV Charging Cost Calculator?

Yes. Note your first estimated charging cost, change battery capacity or another input, and select Calculate again. Editing a field clears the old result so it is not mistaken for a new calculation.

Is EV Charging Cost Calculator free, and where are my inputs calculated?

This calculator is free to use without signing in. Its formula runs in your browser; calculator inputs are not sent to a calculation API. The inputs reset to the example values when you reset the form or start a fresh page.