Calculators
EV Charging Cost Calculator
Calculate monthly electric vehicle charging cost from mileage, efficiency, home and public charging prices, and compare it with a petrol car.
- Runs in your browser
- Nothing uploaded
The tool
Enter your numbers below. Results update as you type, and nothing leaves your browser.
Everything you enter stays on your own machine. Nothing is sent to us or to anyone else, which you can confirm in your browser network tab.
What people use it for
- Comparing an EV with a petrol car
- Budgeting EV running costs
- Choosing an energy tariff
- Fleet transition planning
About this tool
What the EV Charging Cost Calculator does
An electric car’s running cost depends on how far it goes per kWh, the price of electricity at home and at public chargers, and the share of charging done at each. Some energy is lost while charging. This calculator works out cost per mile and compares it with a petrol or diesel car.
Formula
- kWh = miles ÷ efficiency × (1 + charging losses)
- Blended price = home price × home share + public price × public share
- Petrol cost = miles ÷ mpg × fuel price
Worked example
Using the starting values in the calculator above:
| Input | Value |
|---|---|
| Miles per month | 1,000 |
| EV efficiency | 3.5 miles per kWh |
| Home electricity price per kWh | $0.15 |
| Public charging price per kWh | $0.45 |
| Share charged in public | 20% |
| Charging losses | 10% |
| Comparison car fuel economy | 30 mpg |
| Fuel price per gallon | $3.50 |
| Result | Value |
|---|---|
| EV charging cost per month | $66.00 |
| Monthly saving vs petrol | $50.67 |
| EV cost per mile | $0.07 |
| Petrol cost per month | $117 |
| Annual saving | $608 |
| Electricity per month | 314 |
How to read the result
Off-peak home tariffs can cut charging costs sharply; rapid public charging is usually the most expensive way to charge.
Efficiency drops in cold weather and at motorway speeds, so winter costs per mile are higher.
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Questions
Questions about this tool
The things clients actually want to know — costs, timelines, ownership and what happens after launch.
Battery energy used × your electricity price, plus charging losses. Home charging is usually far cheaper per mile than petrol.
Many EVs travel roughly 3 to 4 miles per kWh.
Often around 10%, more with slow charging in cold weather.
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