EV Charging Time by Level Calculator
Use this EV charging time by level calculator to see how long a charge takes on each type of charger — a slow Level 1 socket, a Level 2 home or workplace wallbox, or a DC fast charger. Pick the level, enter your battery size and charge target, and compare the times at a glance.
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Calculate charging time by level
Enter values above and press Calculate to see your result.
Formula used
Each charger level delivers a different power, and time is energy divided by that power:
Energy = Battery × (target% − start%)Time = Energy ÷ (Power × efficiency)
Level 1 (≈1.4 kW) adds only a few miles per hour; Level 2 (7–22 kW) is the home and workplace standard; DC fast charging (50–350 kW) is for rapid top-ups on the road. AC charging is also capped by your car's onboard charger.
Worked examples
Level 1. 20→80% on a 60 kWh battery takes roughly 28 hours at 1.4 kW — overnight isn't enough.
Level 2. The same charge at 7.4 kW ≈ 5 h 24 min — ideal overnight.
DC fast. At 150 kW it's well under 30 minutes to 80% (before tapering).
How to use this calculator
- Enter your battery capacity and the start/target charge.
- Choose the charger level you'll use.
- Adjust efficiency if needed (90% is typical).
- Press Calculate to see the time for that level.
- Change the level and recalculate to compare.
Charging levels compared
| Level | Power | Best for | Range added/hour* |
|---|---|---|---|
| Level 1 (120 V) | 1.4 kW | Emergency / overnight trickle | ~5 km / 3 mi |
| Level 2 (home) | 7.4 kW | Daily home/work charging | ~35 km / 22 mi |
| Level 2 (3-phase) | 11–22 kW | Faster AC where available | ~55–110 km |
| DC fast | 50–150 kW | Road trips, quick top-ups | ~250–800 km |
| DC high-power | 350 kW | Latest cars, fastest stops | Limited by the car |
*Rough, at ~5 km per kWh. AC speed is capped by the car's onboard charger.
Who should use this calculator
Anyone deciding what charger they need at home, comparing the time saved by a faster wallbox, or planning road-trip stops around DC fast chargers. It makes the practical difference between charging levels concrete.
Choosing the right level for you
- Level 1 suits low-mileage drivers or as a backup — it's slow but needs no installation.
- Level 2 is the sweet spot for most homes: a full overnight charge and modest install cost.
- DC fast is for the road, not daily use — frequent fast charging can age the battery faster.
The onboard charger limit
For AC (Level 1 and 2) charging, your car's onboard charger sets the ceiling. A car that accepts 7.4 kW won't charge faster on an 11 kW or 22 kW supply. DC fast charging bypasses the onboard charger, so it's limited instead by the car's maximum DC rate and the charging curve.
Limitations of this calculator
This uses a fixed power per level and a linear model. Real DC sessions follow a curve that slows above ~80%, and AC charging is capped by your car. Battery temperature and the car's accepted power also matter. Use it to compare levels, not as a precise countdown.
Frequently asked questions
How long does Level 2 charging take?
A 20→80% charge on a 60 kWh battery takes about 5.4 hours at 7.4 kW — perfect for overnight. Higher-power three-phase Level 2 is faster.
What's the difference between Level 1, Level 2 and DC fast?
Level 1 is a slow domestic socket (~1.4 kW), Level 2 is a wallbox (7–22 kW) for daily charging, and DC fast (50–350 kW) is for rapid top-ups on trips.
Why doesn't a more powerful AC charger charge my car faster?
AC charging is limited by the car's onboard charger. If it accepts 7.4 kW, a 22 kW supply won't be quicker.
Is DC fast charging bad for the battery?
Occasional fast charging is fine, but relying on it daily can accelerate battery ageing. Most owners charge on Level 2 at home and use DC for trips.
How much range does Level 1 add overnight?
Roughly 40–60 km (25–35 mi) over a typical overnight charge — enough for light commuting but not for high-mileage days.