EV Charging Cost Calculator

Written byOleh Soloninupdated 25 September 2026

Battery capacity, kWh

Charge now, %

Charge to, %

Price per kWh

Charger power, kW

Advanced options

Charging losses, % on top of the battery's energy

How much more the meter records than the battery receives: at 10%, 36 kWh into the battery shows as 39.6 kWh on the meter.

Consumption, kWh per 100 km

From the trip computer or the car's papers; the price and the range depend on it.

Result

kWh into the battery36
kWh from the wall39.6
Cost$237.60
Charging time5 h 39 min
Hours5.66
Per 100 km at your consumption$118.80
Enough for about, km200

The wall always gives up more than the battery takes

Kilowatt-hours drawn from the wall, what they cost and how long the charge takes, including conversion losses.

A charge costs the kilowatt-hours the battery needs, plus the losses on the way, times the tariff. A 60 kWh battery taken from 20 to 80% gains 36 kWh; with losses of 10% on top of that the wall supplies 39.6 kWh, which at 6 per kWh is 237.6.

The time assumes the charger's full power throughout, so read it as a lower bound. Lithium-ion batteries are charged at constant current first and then at constant voltage near the top, where the current gradually falls — the last few percent take longer than a simple division suggests.

How to use

Enter the battery capacity, the charge now and the charge you want.
Enter the price per kWh and the charger power — a domestic socket, a wall box or a rapid charger.
Under the extra fields, set the charging losses and your car's consumption per 100 km from the trip computer or the spec sheet.
Read the energy drawn, the cost, the time, the cost per 100 km and how far the charge will take you.

Time and cost by charger

Each row is a separate run of the calculator at 6 per kWh, 10% losses and 18 kWh per 100 km. Charger power only changes the time; the cost depends on the energy, not on how fast it arrives.

Every row comes from the calculator on this page.
Battery and charge	Charger	From the supply	Cost	Time	Range
60 kWh, 20→80%	2.3 kW	39.6 kWh	237.6	17 h 13 min	200 km
60 kWh, 20→80%	7 kW	39.6 kWh	237.6	5 h 39 min	200 km
60 kWh, 20→80%	11 kW	39.6 kWh	237.6	3 h 36 min	200 km
60 kWh, 10→90%	7 kW	52.8 kWh	316.8	7 h 33 min	267 km
40 kWh, 20→80%	7 kW	26.4 kWh	158.4	3 h 46 min	133 km
80 kWh, 10→80%	7 kW	61.6 kWh	369.6	8 h 48 min	311 km

What this calculator shows

Energy into the battery and energy drawn from the supply
The cost of the charge and the time at constant power
The cost per 100 km and the range at your consumption

What to keep in mind

Losses are your figure; the default 10% is the calculator's assumption, not a measurement. Set it to 0 to see the cost without them.
Time assumes constant power; in the constant-voltage phase the current drops and a real charge takes longer.
The cost per 100 km and the range follow the consumption you enter, which varies for the same car between winter and summer, town and motorway.

FAQs

Why does the supply give more than the battery gains?

Some energy is lost in conversion and in looking after the battery while it charges. How much depends on the car, the charger and the weather, so the losses are yours to set: 10% by default.

Why does charging slow down near the end?

Lithium-ion cells are charged at constant current until the voltage reaches its limit, then at constant voltage while the current tapers. The calculator runs at full power all the way, so the top few percent take longer in practice.

How long does a domestic socket take?

Divide the energy by the socket's power. At 2.3 kW, 39.6 kWh takes 17 h 13 min; an 11 kW wall box does it in 3 h 36 min. The cost is the same either way: 237.6 at 6 per kWh.

What does 100 km cost in an electric car?

The price per kWh including losses, times the consumption. At 6 per kWh, 10% losses and 18 kWh per 100 km it is 118.8; without losses, 108. Enter your own consumption and the line updates.

How do I price a charge at a public charger?

Put the charger's tariff in place of your home one; the cost scales with it exactly. Where a charger bills by the minute, the cost is the per-minute rate times the actual charging time, and the price per kWh is that cost divided by the energy actually delivered. The charger's rated power is no guide: the car may draw less, and the current tapers near the top of the charge.

How far will a charge take me?

The energy the battery gained, divided by the consumption and multiplied by 100. 36 kWh at 18 kWh per 100 km is 200 km; charging from 10 to 90% adds 48 kWh, or 267 km.

Worked example

An overnight charge on a home wall box

Input: 60 kWh battery, 20 to 80%, 6 per kWh, 7 kW charger

Output: 36 kWh into the battery, 39.6 from the supply, 237.6 in 5 h 39 min

Note: At 18 kWh per 100 km those 36 kWh give 200 km, so 100 km costs 118.8. The same charge from a 2.3 kW domestic socket would take 17 h 13 min.

Related tools

Electricity Cost Calculator

Consumption in kilowatt-hours and in money per day, month and year from an appliance's rating and running time.

Trip Fuel Cost Calculator

Litres and money for a journey, the share per passenger and the cost per kilometre, your average consumption per 100 km from a fill-up, and how far the fuel left in the tank will take you.

Recycling Fee Calculator (Russia)

Russia's vehicle recycling levy (utilsbor) for passenger cars in 2026–2030 under Government Resolution No. 1291: the 3,400 and 5,200 ₽ personal-import rates up to 160 hp and the general scale by engine size and power, for petrol, hybrid and electric cars.

Useful links

All tools in Cars