EV Charging Cost Per kWh Calculator

Charging cost per kWh

Battery size

kWh

Electricity price

$/kWh

Rate category

⚡ EV off peak

Cost per kWh $0.08

Full charge cost $8.00 $1.28 per 100 km

Rate comparison

Typical EV charging cost per kWh in Australia

This table shows the cost per kWh, full charge cost and cost per 100 km at each electricity price commonly available in Australia. Use it as a quick reference for comparing home, public and fast charging rates.

How this calculator works

This calculator shows what each kilowatt hour of electricity costs for EV charging. Enter your battery size and electricity rate to see the cost per kWh, full charge cost and cost per 100 km. It shows results at every common price tier so you can compare home, public and fast charging rates at a glance.

Formulas

Cost per kWh = Electricity price ($ per kWh)

Full charge cost = Battery size (kWh) × Electricity price ($ per kWh)

Cost per 100 km = EV efficiency (kWh per 100 km) × Electricity price ($ per kWh)

Worked example

Battery size: 75 kWh
EV efficiency: 16 kWh per 100 km
Electricity price: $0.30 per kWh (Home standard rate)

Cost per kWh: $0.30

Full charge cost: 75 × $0.30 = $22.50

Cost per 100 km: 16 × $0.30 = $4.80

The EV efficiency used for the cost per 100 km comes from your saved vehicle if one is selected, otherwise the default of 16 kWh per 100 km is used.

Price preset guide

Frequently asked questions

What does cost per kWh mean for EV charging?

Cost per kWh is the price you pay for each unit of electricity used to charge your EV. It is the single most important number for comparing charging options because it directly determines your running cost. A lower cost per kWh means cheaper driving — whether you are charging at home, at work or at a public charger.

Why does the cost per kWh vary so much?

Electricity prices vary depending on where and when you charge. Home off peak rates can be as low as $0.08 per kWh, while public ultra rapid DC chargers can cost $0.80 per kWh or more. The difference reflects time-of-use tariffs, infrastructure costs for public chargers, and the convenience premium for fast charging. Charging at home on an off peak tariff is almost always the cheapest option.

How does cost per kWh relate to cost per kilometre?

Cost per kilometre depends on both the electricity price per kWh and your vehicle's efficiency. A more efficient EV uses fewer kWh per 100 km, so the same electricity price results in a lower cost per kilometre. This calculator shows both values so you can see how the cost per kWh translates into real driving cost for your vehicle.