Calc4Living

Automotive Costs · Free calculator

EV Charging Cost Calculator

Estimate battery energy added, energy drawn from the grid and charging cost, with an optional time estimate.

Your vehicle and journey inputs

Prefilled measurements are editable examples. Prices and rates start at zero: unpriced, not local quotes. All fields are required unless marked optional. Results clear when inputs change. Unit changes convert current values; currency changes preserve numbers without exchange rates.

Currency labels only. Enter all prices and expenses in the selected currency. No exchange-rate conversion.

Use available battery capacity, which may differ from advertised gross capacity.

Current state of charge, from 0 to 100%.

At least the starting charge, at most 100%.

Percentage of grid energy stored in the battery; greater than 0 and at most 100.

Enter your own tariff. Default 0 means unpriced; no local tariff is assumed.

Your estimate

Energy, fuel and costs

Review the editable example values, enter your own prices where needed, then calculate.

How much does it cost to charge an electric car?

Battery energy added = usable battery capacity × (target charge − starting charge)/100. Grid energy = battery energy ÷ (charging efficiency/100). Charging losses = grid energy − battery energy. Cost = grid kWh × price/kWh. Optional time = grid kWh ÷ average grid-side charger power in kW.

Worked example

For a usable 60 kWh battery, charging from 20% to 80% adds 36 kWh. At 90% efficiency, the grid supplies 40 kWh, including 4 kWh of losses. If you enter 0.20/kWh, cost is 8.00; at an average grid-side 7.2 kW, estimated time is 5.5556 hours. Electricity price starts at 0.

Unit conversions

1 mile = 1.609344 km. 1 US gallon = 3.785411784 L. 1 imperial gallon = 4.54609 L. US MPG and imperial MPG use different gallon volumes. kW measures power; kWh measures energy.

Assumptions & limitations

  • Enter usable capacity rather than assuming the advertised gross capacity is all available. Battery age, temperature, charge buffers and state-of-charge estimates affect actual energy.
  • Efficiency is the fraction of grid energy reaching the battery. This simplified model accounts for losses with a single average efficiency; auxiliary energy use may differ.
  • Time uses average grid-side input power. Charger ratings are maximums; vehicle acceptance, shared supply, temperature and charging taper can substantially lengthen charging. Do not enter a battery-side power as grid-side power.
  • Target charge must be at least the starting charge. Equal percentages add no energy. Optional charger power must be positive when enabled; no time is shown when disabled.
  • Enter your local electricity price in the selected currency per kWh. Session fees, idle fees, taxes and time-of-use changes are excluded unless you account for them separately. No tariffs or exchange rates are supplied.