EV Public Fast Charge Time Calculator
Calculate realistic DC fast charge time for an EV.
Account for the charging curve from 10 to 80 percent and beyond, plus charger sharing on busy stations.
EV DC Fast Charge Time
DC fast charging is NOT linear — most EVs charge fast from 10-50%, slower from 50-80%, and very slowly from 80-100%. Knowing the charging curve helps you plan trips efficiently.
The 80% rule: For trip planning, stop at 80% SOC (state of charge). Charging from 80→100% often takes as long as 10→80% — wasted time vs. just getting back on the road.
Typical charging curves by EV (10-80% time):
| EV Model | Peak Power | 10-80% Time |
|---|---|---|
| Tesla Model 3 LR (2024) | 250 kW | 22 min |
| Tesla Model Y LR | 250 kW | 27 min |
| Hyundai Ioniq 5 / Kia EV6 | 240 kW | 18 min |
| Hyundai Ioniq 6 | 233 kW | 18 min |
| Porsche Taycan | 270 kW | 21 min |
| Ford F-150 Lightning | 150 kW | 36 min |
| Chevy Bolt | 55 kW | 65 min (slow!) |
| Nissan Leaf 40 kWh | 50 kW | 45 min |
| VW ID.4 | 135 kW | 36 min |
| Rivian R1T | 220 kW | 38 min |
| Lucid Air Touring | 300 kW | 22 min |
Why 10-80% takes about half the time of 0-100%:
- 10-50%: peak charging speed (full 150-300 kW)
- 50-80%: drop to ~70% of peak
- 80-90%: drop to ~30% of peak
- 90-100%: trickle charging at 5-15% of peak (battery management protection)
Charger types and max speeds:
| Charger | Max Power | Used by |
|---|---|---|
| Tesla Supercharger V3 | 250 kW | Tesla NACS (now expanding) |
| Tesla Supercharger V4 | 350 kW | Tesla NACS / Cybertruck |
| Electrify America 350 | 350 kW | CCS, NACS adapter |
| EVgo / ChargePoint | 100-350 kW | CCS, NACS adapter |
| Free DC chargers | 50-100 kW | Often outdated |
| Older CCS / CHAdeMO | 50-62.5 kW | Older infrastructure |
Charger sharing reality: Most non-Tesla DC fast chargers share power between adjacent stalls:
- 350 kW charger with 2 stalls = 175 kW each (split)
- Some chargers reduce to 90 kW per stall when both occupied
- Tesla Superchargers split similarly when adjacent stalls (V3) are in use
- Always check the kW reading at the start
Battery temperature effects:
- Cold battery (<32°F / 0°C): charging speed drops 30-70%
- Pre-conditioning (Tesla, Hyundai, Kia): warms battery during navigation to charger — restores full speed
- Hot battery (after long highway driving): minimal effect on speed
- Charging when low (under 10% SOC): peak power until 50%, then standard curve
Practical trip planning: For a 300-mile trip in a 250-mile range EV:
- Start at 90%, drive 200 miles, arrive at charger with 30%
- Charge 30→80% in ~25 min (gain 175 mi range)
- Arrive at destination with 30% (allows 75 mi back to home charger)
This is faster than any 0→100% charging strategy.
Cost considerations:
| Network | Typical Cost |
|---|---|
| Home charging | $0.10-0.15/kWh |
| Tesla Supercharger | $0.25-0.45/kWh |
| Electrify America | $0.31-0.43/kWh (members cheaper) |
| EVgo | $0.30-0.40/kWh |
| ChargePoint (varies) | $0.20-0.50/kWh |
DC fast charging is 2-4× the cost of home charging. Plan trips to charge home overnight when possible.