This EV Cost Per KM Calculator helps you estimate the electricity cost of driving your electric vehicle for each kilometre travelled. It uses your electricity rate and your EV's energy consumption, usually measured in kilowatt hours per 100 kilometres.
Typical estimates and examples
If you are not sure what energy consumption to enter, use these guide values.
| Reference | Typical value |
|---|---|
| Very efficient EV | 14 kWh per 100 km |
| Average EV | 16 to 18 kWh per 100 km |
| Large EV or SUV | 20 to 24 kWh per 100 km |
| General home electricity example | $0.30 per kWh |
| Home off peak example | $0.15 to $0.25 per kWh |
These values are examples and starting points only. Real world consumption varies with speed, weather, terrain, tyres and driving style.
Quick examples
| Scenario | Estimated running cost |
|---|---|
| 14 kWh per 100 km at $0.30 per kWh | 4.2 cents per km |
| 16 kWh per 100 km at $0.30 per kWh | 4.8 cents per km |
| 18 kWh per 100 km at $0.30 per kWh | 5.4 cents per km |
| 22 kWh per 100 km at $0.30 per kWh | 6.6 cents per km |
Use your own electricity rate if you know it. Home charging and public fast charging can produce very different results.
How EV cost per km is calculated
Cost per km = (kWh per 100 km × Electricity price per kWh) ÷ 100
Example cost per km calculation
Cost per 100 km = 16 × 0.30 = $4.80
Cost per km = $4.80 ÷ 100 = $0.048
That is 4.8 cents per kilometre.
Frequently asked questions
Often yes. Home charged EVs are commonly cheaper per kilometre than many petrol vehicles.
Speed, temperature, terrain, tyres, climate control and driving style can all change energy use.