Public EV Charging Cost
Free Public EV Charging Cost calculator with clear step-by-step results.
About Public EV Charging Cost
Public rapid charging carries three charges: energy, a session or connection fee, and increasingly an idle fee once charging finishes. Expressing the all-in total as cost per hundred kilometres is what makes it comparable against petrol and against home charging.
Formulas
Session cost
Total = kWh x price + session fee + idle fee x idle minutes
Cost per 100 km
Cost = total / (kWh / consumption per 100 km x 100) x 100
Worked example
With the default values below, Public EV Charging Cost returns Total cost of the session of $41.05. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Energy addedminimum 0.1 kWh
- 45 kWh
- Charging priceminimum 0 $/kWh
- 0.79 $/kWh
- Connection or session feeminimum 0 $
- 0.5 $
- Idle fee after charging completesminimum 0 $/min
- 0.5 $/min
- Minutes left connected after chargingaccepts 0–600
- 10
- Vehicle consumptionminimum 1 kWh/100km
- 18 kWh/100km
Results
- Total cost of the session
- $41.05
- Cost of the energy
- $35.55
- Range added
- 250.0 km
- Cost per 100 km
- $16.42
Step by step
- 1Values used
- 2Session cost
- 3Cost per 100 km
- 4Total cost of the session= $41.05
- 5Cost of the energy= $35.55
- 6Range added= 250.0 km
- 7Cost per 100 km= $16.42
Assumptions and limits
- The result is derived only from the 6 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
Why do idle fees exist?
To stop charged vehicles blocking rapid chargers. They typically start a few minutes after the session completes and can accumulate quickly - ten minutes at 50 cents is more than a kilowatt-hour of energy.
Is rapid charging much worse than home charging?
Usually three to six times the cost per kilowatt-hour. That is why the cost per hundred kilometres on public rapid charging can approach or exceed petrol.