Free EV Charging Cost Calculator
Calculate the cost to charge an electric vehicle at home based on battery size and electricity rate.
kWh
%
USD/kWh
%
Cost Per Charge
$9.33
kWh From Wall66.7 kWh
Monthly Cost (8 charges)$74.67
Cost Per Charge vs Electricity Rate
How EV Charging Costs Work
The cost to charge depends on battery capacity, how much charge you add, your electricity rate, and charger efficiency.
Formula
kWh From Wall = Battery kWh x Charge % / Charger Efficiency
Cost = kWh x Electricity Rate
Level 2 home chargers are typically 85-95% efficient.
Example Calculation
75 kWh battery, charging 80%, $0.14/kWh, 90% efficiency.
- 01Energy needed = 75 x 80% = 60 kWh to battery
- 02From wall (90% efficiency) = 60 / 0.90 = 66.7 kWh
- 03Cost = 66.7 x $0.14 = $9.33
- 04Monthly (8 charges) = $9.33 x 8 = $74.67
Frequently Asked Questions
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