Charging Time Calculator

How does the charging time calculator work?

Our tool is designed to provide you with an accurate estimate of the time your electric vehicle needs to be connected to the grid. To get the result, the calculator analyzes the relationship between the energy remaining to be completed in the battery and the power the charger is capable of supplying constantly.

Key factors in electric vehicle charging speed

The total charging time does not only depend on the battery, but on an ecosystem of technical factors that can accelerate or slow down the process:

• Charging point power (kW): From domestic sockets (2.3 kW) to ultra-fast on-road chargers (more than 150 kW).
• Battery capacity (kWh): It's the car's "tank". The higher its capacity, the longer it will take to fill at the same power.
• On-board charger: Many cars limit AC (alternating current) charging to 7.4 kW or 11 kW, regardless of whether the charger is more powerful.
• State of Charge (SoC): Charging speed usually decreases drastically when the battery reaches 80% to protect the lifespan of the cells.

Formula for calculating charging time manually

If you want to understand the logic behind our calculator, the basic formula is simple: Time = Energy to charge (kWh) / Charging power (kW). For example, if you have an empty 60 kWh battery and use an 11 kW charger, the theoretical time would be about 5.4 hours. However, factors such as energy efficiency loss (usually between 10% and 15%) often slightly extend this process.

Using this calculator allows you to better plan your routes, optimize the use of night-time electricity tariffs, and better understand your vehicle's performance in different charging scenarios.