EV Charging Cost Calculator
Estimate the cost to charge an electric car from one state of charge to another (accounting for charging losses) with the range added and the cost per mile. Calculates in your browser.
Cost to charge
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Show the math
You pay for energy drawn from the grid, not just what reaches the pack:
into battery = capacity × (to% − from%)
from grid = into battery ÷ efficiency%
cost = from grid × price
Home AC charging is typically 85–90% efficient; the rest is lost as heat. Range added uses your real-world miles per kWh. All math runs locally in your browser.
What this does
An EV charging cost calculator estimates the cost to charge an electric car from one state of charge to another (accounting for charging losses) with the range added and the cost per mile.
How it works
The energy added to the pack is the battery capacity times the change in state of charge. Charging is not perfectly efficient, so the energy drawn from the grid is a little higher, and you pay for that at your price per kWh.
How to use it
- Enter the battery capacity.
- Enter the start and target state of charge.
- Enter your price per kWh and charging efficiency.
- Read the charging cost and range added.
Understanding your result
Home AC charging is typically 85–90% efficient. Range added is the energy into the battery times your real-world miles per kWh, usually 3–4 mi/kWh for a typical EV.
Example
Adding 50% to a 60 kWh battery at $0.15/kWh and 90% efficiency costs about $5.
Sources & methodology
Last updated .
Frequently asked questions
How is charging cost calculated?
The energy added to the pack is the battery capacity times the change in state of charge. Because charging is not perfectly efficient, the energy drawn from the grid is a little higher, and you pay for that grid energy at your price per kWh.
What is charging efficiency?
Some energy is lost as heat during charging. Home AC charging is typically 85–90% efficient, so drawing 10 kWh from the wall might put about 9 kWh into the battery.
How much range does a charge add?
Range added is the energy into the battery times your real-world miles per kWh, usually 3–4 mi/kWh for a typical EV.
Is my data stored?
No. All math runs locally in your browser.
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