EV Charging Time Calculator
Find out how long it takes to charge your electric car at home or at a public station. Estimate charging time based on battery level, charger type, and power output. See how different charging setups affect your total charging time.
Going from 20% to 100% on a Tesla Model 3 Standard Range adds about 46.0 kWh — roughly 161 miles of range at an illustrative 3.5 mi/kWh. At 7.2 kW that is a long session for this charger — though still comfortably inside a normal overnight window.
- Home outlet 120V (1.4 kW)32 hr 51 min
- Home charger 240V (7.2 kW)— your choice6 hr 23 min
- Public Level 2 (11 kW)4 hr 11 min
- Tesla Supercharger (150 kW)18 min
- DC Fast Charger (50 kW)55 min
Each row is your own 46.0 kWh divided by that charger's power. AC rows also depend on your car's onboard charger — if it accepts less than 11 kW, the public Level 2 row will be slower in practice. DC rows assume steady power, which real sessions only hold below roughly 80%.
What this means for your session
Overnight charging: Yes. 6 hr 23 min plugged in when you get home means the car is at 100% well before morning, with hours to spare — enough that you could delay the start to catch an off-peak rate window.
On a road trip: Not this charger. 6 hr 23 min on AC power is a park-and-leave session, fine for a hotel or a day at work but not for a driving break. The same 46.0 kWh takes about 18 min on a Tesla Supercharger.
Would a faster charger help? Yes — noticeably. Moving from Home charger 240V to Tesla Supercharger takes this session from 6 hr 23 min to about 18 min, a saving of roughly 6 hr 5 min. Whether it is worth paying for depends on whether the car is parked anyway: if you are asleep, both durations feel identical.
What could make it longer: This is a straight energy-divided-by-power estimate, so it is a floor rather than a promise. Your target of 100% crosses the point where charging slows to protect the pack. In cold weather the same session commonly runs closer to 7 hr 21 min. A shared or derated station, or an onboard charger smaller than the outlet, will also stretch it.
What to do about it
- Stop at 80% and save about 1 hr 36 min. Reaching 80% takes roughly 4 hr 47 min of your 6 hr 23 min; the last 20% accounts for the rest. On AC the taper is mild, so this is worth doing for battery longevity more than for time.
- Delay the start — you have 1 hr 37 min of slack. The session needs 6 hr 23 min of an eight-hour night, so a scheduled start time can move all of it into an off-peak rate window without changing when the car is ready.
How EV charging speed actually works
Charging speed is the lower of two limits: what the charger can deliver and what the car can accept. A 350 kW charger feeding a car capped at 150 kW will run at 150 kW. Battery temperature, state of charge, and pack chemistry also throttle real-world speeds.
Level 1, Level 2, and DC fast charging
Level 1 uses a standard household outlet — slow but universal. Level 2 needs a 240V circuit and is the standard for home and workplace. DC fast charging skips the car's onboard charger and feeds the battery directly, enabling road-trip speeds.
Charging in cold weather
Cold batteries charge slowly to protect cell health. Below 20°F, expect 30–50% longer fast-charge sessions unless your EV pre-conditions the pack. Plug in immediately after driving, while the battery is still warm.
Real-life charging time examples
Model 3 LR (10–80% on a 250 kW Supercharger): ~25 minutes. Same car on a home Level 2: ~7 hours. Nissan Leaf 40 kWh on a 50 kW DC: ~45 minutes. Numbers swing with battery temp and how busy the station is.
EVs slow down charging dramatically above 80% — the last 20% can take as long as the first 80% on a fast charger. Smart road trippers stop at 80% and drive on.
Quick facts
Charge faster, charge smarter
- Plan fast charges between 10% and 80% — the sweet spot for speed.
- Pre-condition the battery via the in-car nav when heading to a fast charger.
- On a Level 2, charging from 20% to 80% is plenty for daily use.
- Avoid maxing out to 100% unless your trip absolutely needs the range.