Tax Tool

Energy

EV Charging Time Tool

Calculate estimated electric vehicle charging duration. Enter your usage and energy price for a planning estimate.

Quick math0

Use this for quick arithmetic, percentages, or to check figures while filling in the main tool, without leaving the page.

Your figures

Estimate

Estimated charging time: 5.1 hours

Charging time
5.1 hours

Actual charging time depends on temperature, battery state and the vehicle's charging curve.

How to use this tool

  1. Use EV Charging Time Tool for the question described above, and check that the inputs match your records and time period.
  2. Enter energy to add (Energy added, not necessarily full battery capacity.).
  3. Enter charger power (Maximum available charging power.).
  4. Enter charging efficiency (Accounts for charging losses.).
  5. Change energy to add, charger power, charging efficiency to compare scenarios, then check the units in the result.

Worked example with the prefilled values

This example shows how EV Charging Time Tool uses its starting values. Change the calculator inputs to estimate your own situation.

Energy to add
50 kWh
Charger power
11 kW
Charging efficiency
90 %

Estimated charging time: 5.1 hours

  • Charging time5.1 hours

Actual charging time depends on temperature, battery state and the vehicle's charging curve.

Formula and calculation logic

Estimated charging time (hours) = energy to add (kWh) ÷ (charger power (kW) × charging efficiency ÷ 100)

Charging hours equal energy to add divided by charger power adjusted by the efficiency percentage.

Assumptions

  • The charger and vehicle may reduce power as the battery fills. Temperature, battery state, onboard charger limits, and charging losses vary.

Published sources

Further reading for checking current rules and information. These links are not live inputs to the tool.

Questions about this tool

Will my car charge at the entered power for the whole session?

Not always. The vehicle or charger can lower power as the battery fills, and temperature and the vehicle's onboard charger also affect charging time.