Charging Guide · Calculator
EV Charging Time Calculator
How long does it take to charge an electric car? Pick your EV, set your start and target charge, choose Level 1, Level 2 or DC fast charging, and get an instant estimate with the charging curve, miles added per hour and session cost.
Step 1 · Your car & charger
Set up your charging session
Drag to override the charger power above, or type an exact value below.
Most drivers fast-charge to 80%. Past 80% the charging curve tapers and each extra percent takes much longer.
US average is about $0.16/kWh. Used only for the session cost estimate.
Charging curve
Why charging slows past 80%
The line shows charging power at each battery level. DC fast charging holds full power to about 80%, then tapers to protect the battery — which is why a 10–80% charge is fast, but 80–100% can take almost as long again.
Side-by-side
Level 1 vs Level 2 vs DC fast — same session
Same car, same start and target charge. Only the charger changes. Your selected charger is highlighted.
| Charger | Power used | Time | Miles / hour |
|---|
Guide
How long does it take to charge an electric car?
It depends on three things: how big the battery is, how empty it is, and how powerful the charger is. A small car on a DC fast charger can add 100 miles in about 15 minutes, while the same car on a household outlet may need a full day. This EV charging time calculator does the maths for your exact car and charger so you can plan home charging, road trips and public charging stops with confidence.
The basic formula is simple: charging time ≈ usable battery (kWh) × % to add ÷ charging power (kW), adjusted for losses. That is the difference between kW vs kWh: kWh is how much energy the battery holds, kW is how fast that energy flows in. A 75 kWh battery charging at 11.5 kW needs roughly 6.5 hours from empty before efficiency losses — and no charger runs at full speed all the way to 100%.
Level 1 vs Level 2 vs DC fast charging time
- Level 1 (120V, ~1.4 kW) uses a standard outlet and adds about 3–5 miles per hour. Best for plug-in hybrids and very short daily commutes; a full EV charge can take 20–50 hours.
- Level 2 (240V, 7.6–19.2 kW) is the home and workplace standard, adding roughly 25–45 miles per hour. Most EVs charge overnight in 4–10 hours.
- DC fast charging (50–350 kW) is built for road trips. Cars like the Hyundai Ioniq 5 and Kia EV6 quote a 10–80% charge time of about 18 minutes on a 350 kW charger; Tesla charging time on a Supercharger is typically 25–30 minutes for the same window.
How this calculator works — and the charging curve
Select your model and the tool loads its usable battery capacity plus its maximum AC and DC acceptance rates — a 350 kW charger cannot help a car that only accepts 150 kW. It then integrates the charging curve: full power up to about 80%, then a taper to roughly half power at 90% and a quarter near 100%, because the battery management system slows charging to protect the cells. Charging efficiency (usually 85–93%) and the optional cold-weather slowdown are applied on top, since cold batteries accept charge more slowly. The result is your estimated time, kilowatt-hours and miles added, and miles added per hour of charging.
Factors affecting EV charging speed
Beyond charger power, the biggest factors affecting EV charging speed are starting state of charge (emptier is faster on DC), battery temperature, the car’s peak and average acceptance rate, and whether another vehicle is sharing the charger cabinet. Preconditioning the battery on the way to a fast charger, arriving near 10%, and unplugging around 80% is the fastest road-trip strategy for almost every EV.
Frequently asked questions
How long does it take to charge an electric car at home?
On Level 2 (240V), most EVs add 25–45 miles per hour, so an overnight charge of 8 hours easily covers 200+ miles. On Level 1, expect only 30–40 miles overnight.
What does 10–80% charge time mean?
Manufacturers quote DC fast charging from 10% to 80% because that is the fastest part of the charging curve. Charging from 80% to 100% can take as long as 10% to 80% due to the taper, so most drivers unplug at 80% on road trips.
How long does a Tesla take to charge?
A Tesla Model 3 or Model Y typically charges from 10% to 80% in about 25–30 minutes on a V3 Supercharger, about 4–5 hours on an 11.5 kW Level 2 home charger, and well over a day on Level 1.
Does cold weather really slow EV charging?
Yes. A cold battery can accept charge 20–30% more slowly, especially on DC fast chargers. Preconditioning while driving to the charger restores most of the speed.
Is it bad to charge to 100% every day?
For daily driving, most manufacturers recommend an 80–90% limit to reduce battery wear, reserving 100% for long trips. LFP-battery models are the exception and can be charged to 100% regularly.
How much does a charging session cost?
Multiply the energy drawn from the wall (battery kWh added ÷ efficiency) by your electricity price. At $0.16/kWh, adding 45 kWh costs about $8 at home — usually far less per mile than gasoline.