EV Charging Cost Calculator
Cost per charge, per mile, and versus petrol.
Enter your values
Enter the battery capacity in kWh.
Enter the electricity price in $/kWh.
Enter the range on a full charge in miles.
Enter the comparison petrol car in mpg.
Enter the petrol price in $/gal.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Cost of a full charge
- $13.33
- Cost per mile
- $0.0494
- Petrol equivalent per mile
- $0.115
- Saving per 1,000 miles
- $65.62
- Effective MPG-equivalent
- 69.9
Quick answer
EV charging cost is battery kWh × electricity price ÷ charging efficiency; per-mile cost is that divided by range.
At a glance
| What it does | Cost per charge, per mile, and versus petrol. |
|---|---|
| Category | Auto |
| Inputs needed | Battery capacity, Electricity price, Range on a full charge, Comparison petrol car, Petrol price |
| Main output | Cost of a full charge |
| Cost | Free — no sign-up, no download |
How to use the EV Charging Cost Calculator
- 1Enter your battery size and range.
- 2Add your electricity rate.
- 3Compare against a petrol car's mpg.
Inputs explained
- Battery capacity(kWh)
- Enter the battery capacity in kWh.
- Electricity price($/kWh)
- Enter the electricity price in $/kWh.
- Range on a full charge(miles)
- Enter the range on a full charge in miles.
- Comparison petrol car(mpg)
- Enter the comparison petrol car in mpg.
- Petrol price($/gal)
- Enter the petrol price in $/gal.
Worked example
Using the values the calculator loads with:
Inputs
- Battery capacity75 kWh
- Electricity price0.16 $/kWh
- Range on a full charge270 miles
- Comparison petrol car30 mpg
- Petrol price3.45 $/gal
Results
- Cost of a full charge$13.33
- Cost per mile$0.0494
- Petrol equivalent per mile$0.115
- Saving per 1,000 miles$65.62
- Effective MPG-equivalent69.9
Frequently asked questions
Why divide by 0.9?
Charging loses roughly 10% to heat and conversion, so the meter records more energy than the battery gains.
Is rapid charging more expensive?
Yes, often two to four times the home rate, which is why most owners charge at home overnight.
What do I need to enter into the EV Charging Cost Calculator?
Just 5 values: battery capacity, electricity price, range on a full charge, comparison petrol car, petrol price. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the EV Charging Cost Calculator work out the answer?
EV charging cost is battery kWh × electricity price ÷ charging efficiency; per-mile cost is that divided by range. The working is shown step by step so you can verify the result by hand.
Is the EV Charging Cost Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.