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Level 1 charging is the slowest and most basic way of charging an electric car. It uses a standard 120-volt household outlet, and it typically takes around 8 to 12 hours to charge an electric car with a battery size of 60 to 80 kilowatt-hours (kWh) fully. However, if your vehicle has a smaller battery capacity, it may take less time.

Level 2 charging is faster than level 1 charging and uses a 240-volt power source. These charging stations can be found in public places such as shopping malls, office buildings, and parking lots. With a level 2 charger, an electric car can be fully charged in 4 to 6 hours for a battery size of 60 to 80 kWh. However, if your battery is smaller, it will take less time.

DC fast charging, also known as level 3 charging, is the quickest way to charge an electric car. This type of charging uses a 480-volt direct current (DC) power source and can provide a range of up to 80% in just 30 minutes. However, it's important to note that not all electric cars are compatible with DC fast charging, and the charging rate may vary depending on the battery size and charging station.

Several factors can affect the charging time of an electric car, such as the battery size, the state of charge, and the charging rate. The charging time may also be influenced by the weather conditions, as extreme temperatures can affect the battery's performance.

The formula for calculating the charging time for an electric car using a charging station is:
Charging Time = Required Energy for Charging ÷ Charging Rate
Where the required energy for charging is the amount of energy needed by the battery, usually measured in kilowatt-hours (kWh).
The charging rate is the output power of the charging station, usually measured in kilowatts (kW).
For example, if the battery capacity of your car is 40 kWh and a charging station with a charging rate of 7 kW is used for charging, the charging time can be calculated by dividing the required energy for charging by the charging rate: Charging Time = 40 kWh ÷ 7 kW ≈ 5.7 hours