EV Charging Time Calculator
To charge 60% of the battery
Range added per hour
Assumes Level 2 (240V) home charging at ~94% efficiency.
How long does it take to charge an EV at home?
This calculator estimates your home charging time from two numbers: how much energy you need to add (your battery size and how empty it is) and how fast your charger delivers power (its amperage). The result is roughly how many hours an overnight charge will take.
The short version: a Level 2 home charger adds about 25–44 miles of range per hour, so nearly any EV recharges fully overnight. A standard Level 1 wall outlet is far slower, often only 3–5 miles per hour.
Level 1 vs Level 2 charging speed
The difference between charging levels is dramatic. Level 1 (a regular 120-volt outlet) trickles in a few miles per hour, fine for plug-in hybrids or light drivers, but slow for a full battery EV. Level 2 (240 volts) is 5–10× faster and is what most home charging guides recommend.
For a deeper comparison, see Level 1 vs Level 2 charging.
What affects your charging time
- Battery size (kWh), bigger batteries take longer to fill
- How depleted the battery is when you plug in
- Charger amperage, 48A charges faster than 32A
- Your vehicle's maximum onboard charging rate
- Temperature, very cold weather can slow charging slightly
Choosing the right charger
Because most people charge overnight, you rarely need the absolute fastest charger, you need one that comfortably refills your daily driving by morning. A 40–48A Level 2 charger like the Tesla Wall Connector does this for virtually every EV with room to spare.
If you're deciding what to install, our best home EV chargers guide compares the top options.
The overnight test: the only number most drivers need
Skip the spec-sheet racing and ask one question: does your daily driving recover in your nightly window? A 40-mile commute needs ~10kWh; even a modest 32A charger replaces that in under 90 minutes. A 10 p.m.–6 a.m. window at 32A restores roughly 200 miles, more than all but road-trip days consume.
This is why 'faster' stops mattering at home beyond a point: once the car is always full by morning, extra amperage buys nothing but headroom for unusual days. Spend the difference on the circuit quality instead.
Why your times may differ from the math
Real sessions deviate predictably. Cold batteries charge slower until they warm (winter mornings show it most). The final 10–15% tapers on some vehicles even on AC. Vehicle onboard chargers cap intake, a 48A wall unit feeds a 32A-limited car at 32A. And load-managed circuits throttle briefly when the house peaks, then recover.
None of these are faults; they're the system working. If charging runs chronically below the calculated rate in mild weather, though, that's worth a circuit check, since undervoltage from a marginal connection also slows charging and it's the one cause that matters.
Household logistics: two cars, one charger
Charging time math changes with a second EV. A single 40A charger serves two commuter cars comfortably if overnight windows alternate, each car's 10–15kWh daily need occupies only a slice of the night. The friction is human, not electrical: who plugs in when, and the driveway shuffle.
Power-sharing hardware removes the choreography: two chargers on one managed circuit split capacity automatically, both cars full by morning without negotiation. When the calculator shows your nightly window fits both vehicles' needs at half power each, the dual-charger setup is already viable on your existing service.
Frequently asked questions
On a Level 2 home charger, most EVs add 25–44 miles of range per hour, so a typical overnight charge fully refills the battery. On a standard 120-volt outlet (Level 1), it's much slower, often 3–5 miles per hour.
A Level 2 (240-volt) charger is roughly 5–10 times faster than a Level 1 (120-volt) outlet. That's the difference between recharging overnight and taking days to refill a depleted battery.
Yes. Charging time scales with how much energy you need to add, so a larger battery (or one that's more depleted) takes longer to fill at the same charger amperage.
For most drivers, a 40–48A Level 2 charger is more than enough, it replaces a full day of driving in a couple of hours and easily tops off overnight, regardless of how much you drove that day.
The car's onboard charger sets the AC ceiling, a 32A-limited vehicle draws 32A from any wall unit. Check your model's spec; the wall charger's extra capacity simply waits for your next car.
AC home charging at any amperage is gentle, the pack's thermal system barely notices. The battery-care conversation belongs to DC fast charging habits, not Level 2 speed.
Meaningfully in winter, warming the cabin and battery while plugged in spends grid power instead of range, effectively shortening the next day's required charge. Schedule departure in the car's app and the overnight session covers both the miles and the morning warm-up.