EV Charging Time Calculator
Battery size, charge level, charger power — and out comes the time. Compare Level 1, Level 2, and DC fast charging in one place.
Typical: 40 kWh (small EV), 60–80 kWh (mid), 100+ kWh (large).
Typical EVs: 3–4.5 mi/kWh (≈ 5–7 km/kWh).
Estimated charging time
0 h
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Includes ~10% AC charging losses. DC fast charging tapers above ~80% — real DC times to 100% run well beyond this estimate.
How EV charging time is calculated
Time = energy needed ÷ effective power. Energy needed is battery capacity × (target % − current %). Effective power is the charger rating minus losses — about 10% for AC charging (the car's onboard charger), 5–8% for DC.
Typical times for a 75 kWh battery, 20% → 80% (45 kWh added):
| Charger | Power | Time (approx.) | Range added / hour* |
|---|---|---|---|
| Level 1 outlet | 1.4 kW | ≈ 36 h | 5 mi |
| Level 2 home | 7.4 kW | ≈ 6.8 h | 27 mi |
| Level 2 three-phase | 11 kW | ≈ 4.5 h | 40 mi |
| Level 2 public | 22 kW† | ≈ 2.3 h | 79 mi |
| DC fast | 50 kW | ≈ 57 min | 188 mi |
| DC fast | 150 kW | ≈ 19 min | 560 mi |
*at 4 mi/kWh. †Most EVs' onboard AC chargers max out at 7–11 kW, so a 22 kW post often charges no faster than 11 kW.
EV charging time FAQ
How long does it take to charge an electric car?
A 75 kWh battery from 20% to 80% (45 kWh): ≈ 33 h on Level 1, ≈ 6.5 h on 7.4 kW Level 2, ≈ 35–45 min on a 100 kW DC fast charger.
Level 1 vs Level 2 vs DC fast — what's the difference?
Level 1: household outlet, 1–2 kW, overnight trickle. Level 2: dedicated AC charger, 7–22 kW, the home standard. DC fast: 50–350 kW, road-trip charging that adds hundreds of miles per hour.
Why does charging slow down above 80%?
The car tapers current to protect the cells as they approach full voltage. On DC fast chargers the last 20% can take as long as the previous 40% — hence the 10%-to-80% road-trip rule.
Why does the wall meter show more kWh than the battery gained?
AC charging loses ~10% in the onboard charger and cabling; DC fast charging loses 5–8% in the station. This calculator includes those losses.