EV Charging Cost
Estimate the cost of one electric car fast or home charge.
About EV Charging Cost
The energy a charge adds equals the battery capacity times the percentage gained, inflated by charging losses. The cost is that energy times the electricity rate. Charging from near-empty at a home rate is typically far cheaper per charge than topping up on a fast charger away from home.
Formula
EV Charging Cost
Energy = battery x (target - current)% / efficiency; cost = energy x rate
- efficiency
- Charging losses in the onboard electronics and battery
Worked example
With the default values below, EV Charging Cost returns Energy Added of 40.0. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Battery sizeminimum 0 kWh
- 60 kWh
- Stored energyaccepts 0–100 %
- 20 %
- Target chargeaccepts 0–100 %
- 80 %
- Electricity rateminimum 0.001 $/kWh
- 0.14 $/kWh
- Charging efficiencyaccepts 10–100 %
- 90 %
Results
- Energy Added
- 40.0 kWh
- Cost per Charge
- $5.60
- Full Battery Cost
- $8.40
Step by step
- 1Values used
- 2EV Charging Cost
- 3Energy Added= 40.0 kWh
- 4Cost per Charge= 5.60
- 5Full Battery Cost= 8.40
Assumptions and limits
- The result is derived only from the 5 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is EV Charging Cost calculated?
Energy = battery x (target - current)% / efficiency; cost = energy x rate The energy a charge adds equals the battery capacity times the percentage gained, inflated by charging losses. The cost is that energy times the electricity rate.
Why does EV Charging Cost matter?
Charging from near-empty at a home rate is typically far cheaper per charge than topping up on a fast charger away from home.
What values do I need to enter?
This calculator takes 5 inputs: Battery size, Stored energy, Target charge, Electricity rate, Charging efficiency. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.