EV charging-time calculator
Choose your car to fill in its battery size, select a Level 1 or Level 2 charging option, and see your estimated charging time. You can also enter your own vehicle details.
Your charging session
Choose your version to fill in its battery capacity and AC charging limit. All values remain editable.
Level 1 uses 120 V; these Level 2 examples use 240 V. Amps are charging current, not the circuit-breaker rating. Choose the power your installation supports.
Use the usable capacity for your model, not its total pack size.
Filled by the charging option above. Edit for shared power, a different voltage, or your charger’s actual setting.
The charge level when you plug in.
Follow your vehicle maker’s recommended charging limit.
Vehicle charging limit & efficiency
Filled by the vehicle preset. This is the car’s AC input limit; its DC fast-charge rating is different.
90% is an adjustable planning assumption, not a measured value.
6 hr 30 min
Level 2 · 32 A / 240 V · 7.68 kW
20% to 80% at up to 7.68 kW AC.
- Energy added to battery
- 45.0 kWh
- Estimated energy from supply
- 50.0 kWh
Assumes constant available power and the efficiency you entered. Actual time varies with temperature, battery conditioning, charging taper, and shared power. This tool covers AC home and workplace charging.
Request a Quote Installation in Miami-Dade & BrowardCompare Level 1 & Level 2 charging
Same battery, target, and efficiency. Every result is capped at your vehicle’s AC limit and rounded to the nearest five minutes.
| Charging option | Power used in estimate | Approximate time |
|---|---|---|
| Level 1 · 1.44 kW12 A / 120 V | 1.44 kW | 34 hr 45 min |
| Level 1 · 1.92 kW16 A / 120 V | 1.92 kW | 26 hr 5 min |
| Level 2 · 3.84 kW16 A / 240 V | 3.84 kW | 13 hr |
| Level 2 · 5.76 kW24 A / 240 V | 5.76 kW | 8 hr 40 min |
| Level 2 · 7.68 kW32 A / 240 V · Selected | 7.68 kW | 6 hr 30 min |
| Level 2 · 9.6 kW40 A / 240 V | 9.6 kW | 5 hr 15 min |
| Level 2 · 11.52 kW48 A / 240 V | 11.5 kWLimited by vehicle | 4 hr 20 min |
| Level 2 · 19.2 kW80 A / 240 V | 11.5 kWLimited by vehicle | 4 hr 20 min |
How the estimate works
Energy needed is the usable battery capacity multiplied by the change in charge percentage. Charging time is that energy divided by the lower of available charger power and the vehicle’s AC limit, then divided by charging efficiency as a decimal.
Hours = battery kWh × (target % − current %) ÷ 100 ÷ effective AC kW ÷ efficiency
For example, a 75 kWh usable battery going from 20% to 80% needs 45 kWh added to the battery. With 7.68 kW available, a vehicle that accepts at least that power, and 90% assumed efficiency, the estimate is about 6 hours 30 minutes.
Which vehicles can I choose?
Presets include selected versions of the Tesla Model 3 and Model Y, Ford F-150 Lightning, Nissan ARIYA, BMW i4, and Volkswagen ID.4. Match the model year and trim shown. Selecting a vehicle fills in its usable battery capacity and AC charging limit while preserving your starting charge, target, and charger choice.
Tesla usable-capacity values are independent estimates, marked in the calculator with their sources. Battery packs, software, age, and market can affect your car’s usable capacity. If your version is missing, choose “Other vehicle / enter manually” and use your vehicle’s specifications.
What do Level 1 and Level 2 mean?
Level 1 is AC charging from a 120 V household supply. Level 2 uses a higher-voltage AC supply; this tool offers 240 V examples from 3.84 to 19.2 kW. These are charging-power options, not installation or circuit-sizing recommendations. For a 208 V workplace supply or shared charging, enter the actual available AC power.
Will a larger charger always charge faster?
The vehicle’s onboard AC charger limits the power it can accept. A shared-power arrangement or a lower installation setting can also reduce the power available. Enter the power your setup will actually provide.
Can I use this for DC fast charging?
This calculation models an AC charging session at a constant rate. DC fast charging needs a vehicle-specific charging curve because power changes throughout the session.
Does this tell me if my panel needs an upgrade?
No. Charging time and electrical service capacity are different questions. An electrician must assess the installation. Read our panel-upgrade guide or request a quote.
A planning estimate from Waveform Power Group LLC. The example is not a claim about a specific vehicle. For charger installation in Homestead, Miami-Dade, or Broward, explore our EV installation services.