EV Charging Time
Estimate how long it takes to charge an electric car to your target.
About EV Charging Time
The energy needed is the capacity times the percent of charge gained, adjusted for charging losses. Dividing by the charger's power gives hours to charge. A 7 kW home charger takes many hours for a big pack, while a 150 kW fast charger tops the same battery up in minutes, so charger power drives the wait.
Formula
EV Charging Time
Time = energy added / charger power
- charger power
- Power delivered by the level 2 or fast charger
Worked example
With the default values below, EV Charging Time returns Energy to Add of 40.0. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Battery sizeminimum 0 kWh
- 60 kWh
- Current chargeaccepts 0–100 %
- 20 %
- Target chargeaccepts 0–100 %
- 80 %
- Charger powerminimum 0.1 kW
- 7.2 kW
- Charging efficiencyaccepts 10–100 %
- 90 %
Results
- Energy to Add
- 40.0 kWh
- Charging Time
- 5.56 h
- Time in Minutes
- 333 min
Step by step
- 1Values used
- 2EV Charging Time
- 3Energy to Add= 40.0 kWh
- 4Charging Time= 5.56 h
- 5Time in Minutes= 333 min
Assumptions and limits
- The result is derived only from the 5 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is EV Charging Time calculated?
Time = energy added / charger power The energy needed is the capacity times the percent of charge gained, adjusted for charging losses. Dividing by the charger's power gives hours to charge.
Why does EV Charging Time matter?
A 7 kW home charger takes many hours for a big pack, while a 150 kW fast charger tops the same battery up in minutes, so charger power drives the wait.
What values do I need to enter?
This calculator takes 5 inputs: Battery size, Current charge, Target charge, Charger power, Charging efficiency. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.