EV Charging Time Calculator • Home and Network EVSE



What affects the charging speed of an electric car?

In addition to battery capacity and EVSE power, speed is affected by battery fullness, electric car internal charging unit limits, battery temperature, and battery age.

What is the most important thing when calculating electric car charging times?

An electric car's battery with its charging capacity, as well as the electric chargers, are two important factors in determining how long it takes to charge an EV.

How long does it take to charge an electric car?

We'll show you a little formula so you know how long it takes to charge your electric car depending on two factors.

There is no one type or time to charge an electric car. There are three speeds (or levels) that are differentiated:

Slow charging (Level 1): when it takes 5 to 8 hours to charge

Semi-quick charging (Level 2): when it takes an average of 1.5 to 3 hours to charge.

DC Fast Charging (Level 3): the car charges in about 15 minutes or less. Sometimes a different connector is used for this.

We must also keep in mind that vehicles have different charging modes, one faster (DC) and one slower (AC).

How does the calculator calculate how long to charge an electric vehicle?

The charging time for an electric car depends on different variables. 

The first thing you need to know is battery capacity. How do you find out the battery capacity of an electric car? Here in the calculator, by selecting the model you will immediately see information about the battery. You can check this information in the datasheet of your car. This data is presented in kWh (kilowatts per hour). For example, a car like the Chevrolet Bolt has a battery capacity of 65 kWh. If you want to know the characteristics and types of batteries that exist, experiment with selecting electric car models in the calculator.

Another piece of information we need to know is the battery charger capacity (EVSE) or charging intensity. This information is calculated by multiplying the voltage (in the U.S. it is 120 V or 240 V) by the charger's power, measured in amps. Generally, with electric chargers, you can already see the degree of power covered in kW, so you only need to multiply the battery capacity and power by 1000. The good news is that a calculator will do it for you here.

Simplified formula for calculating your electric car's charging rate:

Duration = Battery capacity (kWh) x 1000 / EVSE power (kW) x 1000

Or, for example, a car with a 65 kWh battery using a 6.5 kW charger would take this time to charge:

Duration = 65000/6500 = 10 hours.

Of course, a very rough calculation is shown. The Electric Vehicle Calculator, however, takes into account the 10% loss, and the individual limitations of the electric car's built-in charging unit. 

The most common way to charge an electric car is using a home charging station (wall connector) in a private garage with a NEMA 14-50 socket. Depending on the charger and different manufacturers, you can also get faster (Level 2) or slower charging (Level 1). If you choose one of the best charging stations, it will negotiate the maximum allowable power with the car without your involvement.

The fastest charging, on the other hand, is available at constant current charging station networks. Tesla has its connector but can use j1772 on the networks with an adapter.

If you want to buy and install a charger for your electric car in your home, office, you can check out recommendations for the best product from professional electricians.

The EV Charging Time Calculator has been tested on the following equipment:

  • JuiceBox

  • Siemens

  • Eaton

  • Lectron

  • ChargePoint

  • Blink

  • Grizzl-E

What is the charging time for popular electric car models

  Tesla Model 3 Chevy Bolt Nissan Leaf
40 Amp EV charger 4 h 52 min 6 h 53 min 4 h 33 min
32 Amp EV charger 4 h 52 min 6 h 53 min 4 h 33 min
16 Amp EV charger 9 h 52 min 13 h 02 min 7 h 54 min

Many other models can be found on this calculator page.

We hope the EV Charging Time Calculator came in handy for calculating your electric car's recharge time.

With the current tool, you now know how to charge your electric car faster and better, depending on the type of EVSE.