EV Charging Time CalculatorHow Long to Charge an Electric Car (Level 1, Level 2, DC Fast)
Charging time ≈ kWh needed ÷ charging power (after losses).
See how long it takes to charge your EV from any percentage to any percentage. Accounts for your car’s maximum AC and DC charging speed, charging losses and the slowdown that happens as the battery fills.
Battery & charger
20% → 80% on a 7.2 kW charger. Your car accepts up to 7.2 kW here.
Fits overnightCharge level over time
Same session on other chargers
| Charger | This session | 10% → 80% | Range per hour |
|---|---|---|---|
| Level 1 (1.4 kW) | 37 h 49 min | 44 h 07 min | 4 mi |
| Level 2 (7.2 kW) | 6 h 57 min | 8 h 06 min | 23 mi |
| Level 2 (11.5 kW) | 4 h 33 min | 5 h 18 min | 35 mi |
| DC 50 kW | 1 h 04 min | 1 h 14 min | 147 mi |
| DC 150 kW | 21 min | 25 min | 440 mi |
| DC 250 kW | 21 min | 25 min | 440 mi |
How long does it take to charge an electric car?
Charging time ≈ kWh needed ÷ charging power (after losses). Adding 45 kWh (20% → 80% of a 75 kWh battery) takes about 6 h 57 min on a 7.2 kW Level 2 charger, about 37 h 49 min on a standard Level 1 outlet, and roughly 21 min on a 150 kW DC fast charger. Charging slows above about 80%, so the last 20% takes disproportionately long.
Part of our Electric Vehicle calculators — for the core estimate, start with the EV Charging Cost Calculator.
Level 1 vs Level 2 vs DC fast charging
| Charger | Typical power | Where | Range added per hour* |
|---|---|---|---|
| Level 1 | ~1.4 kW (120 V) | Any household outlet | ~4–5 miles |
| Level 2 | 7–19 kW (240 V) | Home garages, workplaces, public lots | ~20–40 miles |
| DC fast | 50–350 kW | Highway corridors, public stations | Hundreds of miles (car-dependent) |
*At about 3.5 miles per kWh. The DOE’s Alternative Fuels Data Center describes Level 1 as suited to drivers with short daily commutes, Level 2 as the common home and workplace option, and DC fast charging as the choice for longer trips.
How to calculate EV charging time
Enter battery size
Use usable capacity, which is slightly less than the gross figure some brands quote.
Set current and target charge
Many owners charge daily to 80% and to 100% only before long trips.
Pick the charger
Choose the charger’s rated power.
Add your car’s limits
Your car’s onboard charger caps AC speed; its battery system caps DC speed.
EV charging time formula
Effective power = lower of charger power and car’s max rate
Level 1/2 time ≈ kWh needed ÷ (effective power × ~0.85–0.90 efficiency)
DC fast time = sum of each 1% step at the power available for that charge level
Know the time — the EV Charging Cost Calculator shows what the same session costs at home or on a fast charger.
Example: 75 kWh battery, 20% → 80%
| Charger | Calculation | Time |
|---|---|---|
| Level 1 (1.4 kW) | 45 kWh ÷ (1.4 × 0.85) | 37 h 49 min |
| Level 2 (7.2 kW) | 45 kWh ÷ (7.2 × 0.90) | 6 h 57 min |
| Level 2 (11.5 kW, car max 11 kW) | 45 kWh ÷ (11 × 0.90) | 4 h 33 min |
| DC 50 kW | stepped curve | 1 h 04 min |
| DC 150 kW | stepped curve | 21 min |
The Level 2 7.2 kW row matches the calculator’s default.
How to charge faster
- Stop at 80% on road trips. The 80–100% stretch can take as long as 20–80%.
- Arrive with a low charge. DC charging is fastest at low states of charge.
- Precondition the battery. Many EVs warm the battery when you navigate to a fast charger, which raises charging speed in cold weather.
- Match the charger to your car. A 350 kW station won’t help if your car peaks at 150 kW.
- Install a 40–48 amp Level 2 circuit at home if your car’s onboard charger can use it.
Planning a road trip? Add charging stops in the Travel Time Calculator and budget everything with the Road Trip Cost Calculator.
Related calculators
EV Charging Time Calculator FAQs
It depends on the charger and battery. Adding 45 kWh takes about 37 hours on Level 1, about 7 hours on a 7.2 kW Level 2 charger and roughly 20 to 25 minutes on a 150 kW DC fast charger for a car that can accept that speed.
On a typical 7.2 kW Level 2 charger, most EVs add about 20 to 30 miles of range per hour and can charge from low to 80% overnight.
Level 1 adds only a few miles of range per hour. It works for short daily commutes but can take more than a day to charge a large battery from low.
Battery management systems reduce charging power as the battery fills to protect battery health and manage heat, so the last 20% is slow.
For many modern EVs it’s roughly 20 to 40 minutes on a high-power charger, but it depends heavily on the car’s peak charging rate and battery temperature.
Only up to your car’s limit. AC charging is capped by the car’s onboard charger, and DC charging by the car’s maximum DC rate.
Yes. A cold battery accepts less power. Preconditioning the battery before fast charging helps.
Multiply the effective charging power by efficiency and miles per kWh. A 7.2 kW charger at 90% efficiency and 3.5 mi/kWh adds about 23 miles per hour.
About the developer
Manzoor Ahmad
Web Designer & Calculator Developer · 13+ years of web development and SEO experienceI’m a professional pharmacist turned tech geek, and I designed and coded this EV charging time calculator myself. AC charging is straightforward math, but DC fast charging follows a curve, so I’ve described the exact taper model the tool uses rather than hiding it.
Found a number that looks wrong, or want a feature added? Tell me through my author page — corrections are fixed and re-dated.
Sources
- U.S. DOE Alternative Fuels Data Center — Developing infrastructure to charge electric vehicles
- U.S. DOE Alternative Fuels Data Center — Charging electric vehicles at home
- U.S. DOE & EPA — FuelEconomy.gov: electric vehicles
Disclaimer: Charging times are estimates. Real speeds depend on the vehicle’s charging curve, battery temperature, charger condition, shared power at stations and state of charge.
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