Electric Vehicle Charging Time Calculator
Estimate the time it will take to charge an electric vehicle by entering the battery capacity and charge level along with the charging power below.
Estimated Charging Time:
How to Estimate Charging Time
The time it takes to charge the battery of an electric vehicle varies on a few key factors. The charging power, battery size, and current charge level will all determine the charging time needed.
The capacity of an electric car battery is measured in the kilowatt-hours of energy it can hold. The charging power will determine the speed of the charge, and is measured in kilowatts.
To calculate the time it will take to charge an electric car, use the following formula.
charge time = battery capacity / charge power × .9
In other words, the time it takes to charge in hours is equal to the size of the battery in kilowatt-hours divided by the charging power times .9, which is the average power efficiency.
For example, let’s estimate the time to charge a 2019 Tesla Model 3, which has a 50 kWh battery to capacity using a 3.7 kW home charger.
charge time = 50 kWh / 3.7 kW × .9
charge time = 50 kWh / 3.33
charge time = 15.015 hours
Thus, it will take about 15 hours to charge a Tesla Model 3 to full capacity using a 3.7 kW charger.
Most often a battery has a partial charge, and charging from 0 to 100% is not necessary. It’s also possible to charge to a partial capacity, which can lower the time needed to charge.
Most home chargers are 7.7kWh or smaller, while public chargers are usually fast or rapid chargers in the 11kW to 50kW range. It’s also becoming more common to see chargers delivering 100kW of charging power or more.
To learn more about the cost of charging an electric vehicle at home, check out our charging cost calculator.
Average Battery Charging Times
See the average time it takes to charge an electric vehicle battery to full capacity using various chargers in the chart below.
Battery Capacity (kWh) | Charger | |||||||
---|---|---|---|---|---|---|---|---|
2.4 kW | 3.7 kW | 7.7 kW | 11 kW | 22 kW | 50 kW | 100 kW | 120 kW | |
5 kWh | 2h 19m | 1h 31m | 0h 44m | 0h 31m | 0h 16m | 0h 7m | 0h 4m | 0h 3m |
10 kWh | 4h 38m | 3h 1m | 1h 27m | 1h 1m | 0h 31m | 0h 14m | 0h 7m | 0h 6m |
15 kWh | 6h 57m | 4h 31m | 2h 10m | 1h 31m | 0h 46m | 0h 20m | 0h 10m | 0h 9m |
20 kWh | 9h 16m | 6h 1m | 2h 54m | 2h 2m | 1h 1m | 0h 27m | 0h 14m | 0h 12m |
25 kWh | 11h 35m | 7h 31m | 3h 37m | 2h 32m | 1h 16m | 0h 34m | 0h 17m | 0h 14m |
30 kWh | 13h 54m | 9h 1m | 4h 20m | 3h 2m | 1h 31m | 0h 40m | 0h 20m | 0h 17m |
35 kWh | 16h 13m | 10h 31m | 5h 4m | 3h 33m | 1h 47m | 0h 47m | 0h 24m | 0h 20m |
40 kWh | 18h 32m | 12h 1m | 5h 47m | 4h 3m | 2h 2m | 0h 54m | 0h 27m | 0h 23m |
45 kWh | 20h 50m | 13h 31m | 6h 30m | 4h 33m | 2h 17m | 1h | 0h 30m | 0h 25m |
50 kWh | 23h 9m | 15h 1m | 7h 13m | 5h 4m | 2h 32m | 1h 7m | 0h 34m | 0h 28m |
55 kWh | 25h 28m | 16h 31m | 7h 57m | 5h 34m | 2h 47m | 1h 14m | 0h 37m | 0h 31m |
60 kWh | 27h 47m | 18h 2m | 8h 40m | 6h 4m | 3h 2m | 1h 20m | 0h 40m | 0h 34m |
65 kWh | 30h 6m | 19h 32m | 9h 23m | 6h 34m | 3h 17m | 1h 27m | 0h 44m | 0h 37m |
70 kWh | 32h 25m | 21h 2m | 10h 7m | 7h 5m | 3h 33m | 1h 34m | 0h 47m | 0h 39m |
75 kWh | 34h 44m | 22h 32m | 10h 50m | 7h 35m | 3h 48m | 1h 40m | 0h 50m | 0h 42m |
80 kWh | 37h 3m | 24h 2m | 11h 33m | 8h 5m | 4h 3m | 1h 47m | 0h 54m | 0h 45m |
85 kWh | 39h 22m | 25h 32m | 12h 16m | 8h 36m | 4h 18m | 1h 54m | 0h 57m | 0h 48m |
90 kWh | 41h 40m | 27h 2m | 13h | 9h 6m | 4h 33m | 2h | 1h | 0h 50m |
95 kWh | 43h 59m | 28h 32m | 13h 43m | 9h 36m | 4h 48m | 2h 7m | 1h 4m | 0h 53m |
100 kWh | 46h 18m | 30h 2m | 14h 26m | 10h 7m | 5h 4m | 2h 14m | 1h 7m | 0h 56m |
110 kWh | 50h 56m | 33h 2m | 15h 53m | 11h 7m | 5h 34m | 2h 27m | 1h 14m | 1h 2m |
120 kWh | 55h 34m | 36h 3m | 17h 19m | 12h 8m | 6h 4m | 2h 40m | 1h 20m | 1h 7m |
130 kWh | 60h 12m | 39h 3m | 18h 46m | 13h 8m | 6h 34m | 2h 54m | 1h 27m | 1h 13m |
140 kWh | 64h 49m | 42h 3m | 20h 13m | 14h 9m | 7h 5m | 3h 7m | 1h 34m | 1h 18m |
150 kWh | 69h 27m | 45h 3m | 21h 39m | 15h 10m | 7h 35m | 3h 20m | 1h 40m | 1h 24m |