Rex says
Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.
Try a scenario
Click to load — tweak from there.Inputs
Result
Blended cost per mile
0.059
Home charging cost per mile
0.049
DC fast charging cost per mile
0.120
Estimated monthly charging cost
$59
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One click, a permanent link with your numbers baked in.
How to use this
- 1Enter vehicle efficiency (mi/kWh).
- 2Enter home electricity rate ($/kWh).
- 3Enter public dc fast charge rate ($/kWh).
- 4Enter charging loss (home l2) (%).
- 5Enter miles driven per month.
- 6Enter share of miles from dc fast charging (%).
- 7Read your blended cost per mile on the right — it updates as you type.
- 8Hit Share to keep the scenario or send it to someone.
About this calculator
Converts your electricity rate and vehicle's efficiency (miles per kWh, printed on the window sticker and in most EV trip computers) into a real cost-per-mile figure, then compares home charging against a public DC fast-charging rate so you can see the spread. Charging losses (AC-to-DC conversion, battery management overhead) typically run 10-15% for Level 2 home charging and are built in as a default. This is the number that actually matters for a fuel-cost comparison against a gas car — not the EPA MPGe label, which most drivers misread.
Worked example
Using the values the calculator loads with:
Inputs
- Vehicle efficiency: 3.5 mi/kWh
- Home electricity rate: 0.15 $/kWh
- Public DC fast charge rate: 0.42 $/kWh
- Charging loss (home L2): 12 %
- Miles driven per month: 1000
- Share of miles from DC fast charging: 15 %
Results
- Blended cost per mile: 0.059
- Home charging cost per mile: 0.049
- DC fast charging cost per mile: 0.12
- Estimated monthly charging cost: $59
What each field means
Inputs
- Vehicle efficiency (mi/kWh)
- The vehicle efficiency used in the calculation, measured in mi/kWh. Starts at 3.5 mi/kWh so you have a working example on load. Accepted range: 1–6 mi/kWh.
- Home electricity rate ($/kWh)
- The home electricity rate used in the calculation, measured in $/kWh. Starts at 0.15 $/kWh so you have a working example on load. Accepted range: 0.02–0.6 $/kWh.
- Public DC fast charge rate ($/kWh)
- The public dc fast charge rate used in the calculation, measured in $/kWh. Starts at 0.42 $/kWh so you have a working example on load. Accepted range: 0.05–1 $/kWh.
- Charging loss (home L2) (%)
- The charging loss (home l2) used in the calculation, measured in %. Starts at 12 % so you have a working example on load. Accepted range: 0–30 %.
- Miles driven per month
- The miles driven per month used in the calculation. Starts at 1000 so you have a working example on load.
- Share of miles from DC fast charging (%)
- The share of miles from dc fast charging used in the calculation, measured in %. Starts at 15 % so you have a working example on load. Accepted range: 0–100 %.
Results
- Blended cost per mile
- Returned as a decimal number and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Home charging cost per mile
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- DC fast charging cost per mile
- Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Estimated monthly charging cost
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
Why is public fast charging so much more expensive?
Networks like Electrify America and EVgo price per-kWh to cover demand charges from the utility (fast chargers can pull 150-350kW instantaneously), site lease, and equipment amortization, plus a margin. Home charging at overnight off-peak rates can be one-quarter the per-kWh cost of DC fast charging in many markets.
How do I find my car's real-world mi/kWh?
Check the trip computer's lifetime average, not the window-sticker EPA number, which is measured under ideal conditions. Highway driving at 75mph, cold weather, and heavy accessory use (heat, AC) can cut efficiency 20-30% below the EPA rating.
Does charging loss really matter that much?
At 10-15% loss on Level 2 home charging, it adds roughly that same percentage to your effective cost per mile since you're paying for the electricity that goes into the wall, not just what reaches the battery. DC fast charging has its own losses baked into the pricing already, so this input only applies to the home-rate side.
How does this compare to a gas car?
Use the EV vs Gas Total Cost calculator to compare directly — but as a rule of thumb, an EV at 3.5 mi/kWh on a 15-cent home rate runs about 4.3 cents/mile, versus a 30mpg gas car at $3.50/gallon running about 11.7 cents/mile, before maintenance differences.
Accuracy and limitations
- Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
- Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
- This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.
Related tools
EV vs Gas Total Cost of Ownership Calculator
Fuel, maintenance, and price difference over years of ownership.
Home EV Charger Install Payback Calculator
When a Level 2 charger install pays for itself vs public charging.
Time-of-Use Rate Shifting Savings Calculator
How much you save moving usage off peak hours.
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). EV Charging Cost Per Mile Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/ev-charging-cost-per-mile
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/ev-charging-cost-per-mile" target="_blank" rel="noopener">EV Charging Cost Per Mile Calculator — RevenueLab</a> (2026).</p>
Source: [EV Charging Cost Per Mile Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/ev-charging-cost-per-mile) (2026).