Last updated: 10 May 2026
EV Charging Time Calculator UK
Estimate how long an EV charge will take from battery size, starting percentage, target percentage, charger power, and charging efficiency.
Charging time calculator
kWh
kW
%
%
%
p/kWh
Estimated time
5 hrs 24 min
Energy required
36.0 kWh
Grid energy required
40.0 kWh
Estimated cost
£9.87
How charging time is estimated
The calculator first works out how much energy is added to the battery, then adjusts for charging efficiency to estimate grid energy. Charging time is grid energy divided by charger power in kW.
Real charging curves are not perfectly flat. Many cars slow down at high battery percentages, especially on rapid chargers. Treat the result as a practical estimate rather than a guaranteed arrival time.
Common charger speeds
- 3-pin plug: about 2.3 kW.
- Home wallbox: commonly around 7 kW or 7.4 kW.
- Fast public AC: often up to 22 kW, depending on car and charger.
- Rapid DC: commonly 50 kW or more.
- Ultra-rapid DC: often 100 kW to 350 kW, if the vehicle can accept it.
For public rapid charging prices, see the public charging guide.