EV Charging Calculator
Work out the energy, time, cost and range of an electric car charging session from battery size, charge levels and charger power.
Tool
How to use it
Enter the usable battery capacity, the charge level now and the level you want, the charger power and your electricity price. Adjust the charging loss and your car’s consumption if you know them.
How it is calculated
Energy into the battery = capacity × (target % − start %) ÷ 100. Energy from the grid = energy into the battery ÷ (1 − loss %). Time = energy from the grid ÷ charger power. Range added = energy into the battery ÷ consumption × 100. The result assumes constant power; the car or the charger may limit it, and fast DC charging slows down as the battery fills, especially above about 80 %.