How Long Does It Take to Charge an Electric Car?

The three charging levels, in official numbers

The US Department of Energy's Alternative Fuels Data Center (AFDC) sorts charging equipment into three levels. Its page on charging infrastructure carries no date; the figures below are as it read in October 2026.

Level	Power	Range added (AFDC)
Level 1 (AC)	120 V plug; the range figure assumes 1.9 kW	Approximately 5 miles per 1 hour of charging
Level 2 (AC)	240 V at home, 208 V in commercial sites; 2.9 to 19.2 kW, most home units 7.2 kW	Approximately 25 miles per 1 hour of charging
DC fast	Up to 500 kW at the charger	Approximately 100 to 200+ miles per 30 minutes of charging

A few details from the same page matter for timing:

Level 1 is the cord most EVs come with. The AFDC says 8 hours of charging at 120 V can replenish about 40 miles of electric range for a mid-size EV.
Level 2 equipment, common at home and also at public and workplace sites, can operate at 40 to 80 amps by the AFDC's figure (the EPA gives 16 to 80 amps). Most residential Level 2 chargers run at up to 30 amps and deliver 7.2 kW, and they need a dedicated 40-amp circuit under the National Electrical Code. The AFDC says Level 2 equipment can charge a typical EV battery overnight.
DC fast charging, also called Level 3, can supply up to 500 kW, but the AFDC adds that many EVs on the road today cannot charge at rates higher than 200 kW. Its footnote on the range figure: charging power varies by vehicle and battery state of charge.

Across all three, the AFDC gives charging times from less than 20 minutes on DC fast chargers to 20 hours or more on Level 1. It names what decides where you land: how depleted the battery is, how much energy it holds, the type of battery, the vehicle's internal charger capacity and the charging equipment itself. The EPA's charging basics page adds temperature to that list and gives its own range per hour: about 5 miles for Level 1, about 25 miles for Level 2 and about 100 to 300+ miles per 30 minutes of DC fast charging. Its Level 2 estimate assumes 6.6 kW.

The formula: energy to add ÷ charging power

A charger is rated in kilowatts, a rate. A battery holds kilowatt-hours, an amount. Dividing the amount by the rate gives the time. The kW vs kWh guide explains the two units if they still blur together.

Energy to add

kWh = battery kWh × (to % − from %)

Charging time

hours = kWh to add ÷ kW

Range per hour

miles per hour = kW × miles per kWh

Charging power

kW = volts × amps ÷ 1,000

Use the battery's usable capacity, the figure the EPA uses in its own example: a car with 100 kWh of usable capacity that goes two miles per kWh has 200 miles of range. The kW in the formula is the power the car actually takes, which is the lower of what the charger can give and what the car can accept. More on that below.

Worked example. An 80 kWh battery at 30% that you want at 80% needs 80 × 0.5 = 40 kWh. On a 7.2 kW Level 2 charger that is 40 ÷ 7.2 = 5.56 hours, about 5 h 33 min. On a 1.9 kW Level 1 cord the same energy takes 21.1 hours, about 21 h 3 min. If you plug in at 6:30 pm, the time duration calculator adds 5 h 33 min to the start time and tells you when the car will be done.

Losses. The formula assumes every kWh from the charger ends up in the battery. It does not: some is lost as heat, so the real time runs a little longer than the result, and your meter counts more than the battery receives. The charging losses section of the EV charging cost calculator explains what drives the loss and how to account for it in the cost. The tables on this page leave losses out, so treat them as the shortest time the charger power allows.

Charging time at home: Level 1 and Level 2

The table applies the formula to four example battery sizes, from 20% to 80% and from 20% to 100%, at 1.9 kW (the AFDC's Level 1 figure), 7.2 kW (the most common home Level 2 power) and 19.2 kW (the top of the Level 2 range). Times are before losses and assume the car accepts the full power.

Battery, charge	1.9 kW	7.2 kW	19.2 kW
40 kWh, 20% to 80%	12 h 38 min	3 h 20 min	1 h 15 min
40 kWh, 20% to 100%	16 h 51 min	4 h 27 min	1 h 40 min
60 kWh, 20% to 80%	18 h 57 min	5 h	1 h 53 min
60 kWh, 20% to 100%	25 h 16 min	6 h 40 min	2 h 30 min
80 kWh, 20% to 80%	25 h 16 min	6 h 40 min	2 h 30 min
80 kWh, 20% to 100%	33 h 41 min	8 h 53 min	3 h 20 min
100 kWh, 20% to 80%	31 h 35 min	8 h 20 min	3 h 8 min
100 kWh, 20% to 100%	42 h 6 min	11 h 7 min	4 h 10 min

Three things stand out. Level 1 is slow for a big top-up: a 100 kWh battery from 20% to 100% needs 42 h 6 min at 1.9 kW, which fits the AFDC's "20 hours or more". At 7.2 kW, all but the largest battery's full charge finish in under 9 hours, which matches the AFDC's note that Level 2 equipment can charge a typical EV battery overnight. And the jump from 7.2 kW to 19.2 kW only helps if the car can take it, which many cannot.

Most days you are not charging from 20%. You are putting back yesterday's driving. That is the better way to size home charging: start from the miles, not from the battery. At an example consumption of 30 kWh per 100 miles:

Miles a day	kWh to put back	1.9 kW	7.2 kW
20 miles	6 kWh	3 h 9 min	50 min
40 miles	12 kWh	6 h 19 min	1 h 40 min
60 miles	18 kWh	9 h 28 min	2 h 30 min
100 miles	30 kWh	15 h 47 min	4 h 10 min

The EPA says many people with commutes under 40 miles a day find a 120 V outlet sufficient to charge overnight. The 40-mile row shows about 6 h 19 min on Level 1 before losses; the AFDC's own figure is 8 hours for about 40 miles, so leave room beyond the table. At 100 miles a day the Level 1 time is longer than most nights, and Level 2 brings it back to a few hours. The AFDC notes that some homes might not have enough electrical capacity for Level 2, and that a qualified electrician can add the circuits it needs.

Miles of range per hour of charging

The AFDC's "about 25 miles per hour" on Level 2 depends on how efficient the car is. Multiply the charging power by your car's miles per kWh to get your own figure. Consumption is usually printed in kWh per 100 miles; 100 divided by it gives miles per kWh. The rows are example values, the last one the EPA's two-miles-per-kWh example.

Consumption	1.9 kW	7.2 kW	19.2 kW
25 kWh/100 mi (4 mi/kWh)	8 mi/h	29 mi/h	77 mi/h
30 kWh/100 mi (3.33 mi/kWh)	6 mi/h	24 mi/h	64 mi/h
35 kWh/100 mi (2.86 mi/kWh)	5 mi/h	21 mi/h	55 mi/h
50 kWh/100 mi (2 mi/kWh)	4 mi/h	14 mi/h	38 mi/h

A car using 30 kWh per 100 miles gains about 24 miles per hour at 7.2 kW, close to the AFDC's 25. A less efficient vehicle gains fewer miles from the same hour on the same charger. Your consumption is on the window sticker and on fueleconomy.gov; the window sticker guide shows where to find it.

The car sets the ceiling, not just the charger

On AC charging (Level 1 and Level 2), the car turns the grid's alternating current into direct current for the battery with its own equipment. The EPA describes DC fast chargers as the ones that bypass the equipment in your vehicle that normally converts AC to DC. That onboard equipment has a limit, and it caps Level 2 speed no matter how big the wall unit is.

The EPA puts it plainly: every vehicle has an advertised maximum Level 2 charging rate in amps, and a car with a 30-amp charging limit does not benefit from a charger that can supply 80 amps. In power terms, at 240 volts:

An 80-amp charger can supply 240 × 80 = 19.2 kW, the top of the AFDC's Level 2 range.
A car with a 30-amp limit takes 240 × 30 = 7.2 kW, the same as the typical home charger.
So that car charges at 7.2 kW on both, and the 19.2 kW column in the table above does not apply to it.

The same holds for DC. The EPA says all vehicles have a maximum DC fast charging speed they can accept, set by the automaker, so a car that can charge at up to 50 kW charges just as quickly on a 150 kW or 350 kW charger. The AFDC adds that many EVs on the road today cannot take more than 200 kW. The power converter turns a rating in watts or other power units into kW if your manual lists it that way, and the volts, amps and watts guide covers the volts × amps step and what a breaker allows.

Before you buy a home charger, look up your car's advertised maximum Level 2 charging rate. A wall unit stronger than that limit will not charge that car any faster. The EPA also says many small and medium vehicles can recharge an entirely empty battery overnight even on lower-amp chargers.

Charging time on the road: DC fast charging

The same formula works on a fast charger, with one big caveat: the power is not steady. The AFDC says DC charging power varies by vehicle and battery state of charge. So the table below shows a best case: 20% to 80% if the car held the charger's full power the whole way. Real sessions take longer, because the car stays below the peak for part of the time.

Battery, 20% to 80%	50 kW	100 kW	200 kW
40 kWh (24 kWh added)	29 min	14 min	7 min
60 kWh (36 kWh added)	43 min	22 min	11 min
80 kWh (48 kWh added)	58 min	29 min	14 min
100 kWh (60 kWh added)	1 h 12 min	36 min	18 min

Read the 200 kW column only if your car can take 200 kW; read the column at or below your car's DC limit. If your car tops out at 50 kW, the 50 kW column is your best case even at a 350 kW station.

Why the last 20% takes so long

The EPA explains it from the driver's side: the rate of DC fast charging is higher as the battery is closer to empty and slows down as it gets closer to full. In its words, DC fast charging beyond 80% "tends to be significantly slower", and it can sometimes double your time spent charging to reach 100%.

That is why this guide does not put a 100% column in the fast charging table. A steady-power figure for 80% to 100% would understate the time, and the real shape depends on the car. The EPA's advice for road trips:

Fast charge to around 80% of the battery's capacity, then drive on to the next charging station, unless you need the full range to reach your destination.
Use the DC fast charger with the highest kW rating, up to the maximum speed your car can accept.
When you have time, Level 1 and Level 2 charging at home or at work will usually be cheaper than DC fast charging.

The EPA sums it up: it will generally save you time to fast charge only to around 80% and continue to the next station. Add the drive time between stops to the charging time when you plan; the time duration calculator adds up the legs.

Estimate your own charging time

Find the energy to add. Usable battery kWh × (target % − current %). Or miles driven × kWh per mile, if you are refilling a day's driving.
Find the power the car really takes. The lower of the charger's rating and the car's limit: the AC limit in amps or kW for Level 1 and 2, the DC limit for fast charging.
Divide. kWh ÷ kW = hours. Multiply the decimal part by 60 for minutes.
Add a margin. Losses make every session a little longer. On DC, the slowdown near full makes the time above 80% much longer than the formula says. Temperature plays a part too; the EPA lists it among the factors that affect charging time.
Check against the label. The fuel economy label shows how long it takes to charge a fully empty battery on 240-volt service. A lower voltage than the label assumes means a longer charge.

Time is only half the picture. For what the session costs at home or at a public charger, use the EV charging cost calculator. The EV vs gas car guide compares the cost per mile with a gas car, and the car CO2 guide covers emissions per mile.

Frequently asked questions

How long does it take to charge an electric car at home?

Divide the kWh you want to add by the charger's power in kW. Adding 40 kWh on a 7.2 kW Level 2 charger takes about 5 h 33 min before losses, and about 21 h 3 min on a 1.9 kW Level 1 outlet. The Department of Energy says Level 2 equipment can charge a typical EV battery overnight, while Level 1 adds about 5 miles of range per hour.

How fast is DC fast charging?

The Alternative Fuels Data Center gives approximately 100 to 200+ miles of range per 30 minutes of charging, with power that varies by vehicle and battery state of charge. The EPA puts it at about 100 to 300+ miles per 30 minutes and says the rate is higher when the battery is closer to empty.

Why does charging slow down after 80%?

The EPA says the rate of DC fast charging is higher as the battery is closer to empty and slows down as it gets closer to full. Beyond 80% it tends to be significantly slower, and it can sometimes double your time spent charging to reach 100%. That is why the EPA suggests fast charging to around 80% and driving on to the next station.

Will a more powerful home charger always charge faster?

Only up to what your car accepts. The EPA notes that every vehicle has an advertised maximum Level 2 charging rate in amps, and a car with a 30-amp limit does not benefit from an 80-amp charger. At 240 volts, 30 amps is 7.2 kW, so that car charges at about 7.2 kW on either unit.

Is a regular 120 V outlet enough?

For short daily drives it can be. The AFDC says 8 hours of charging at 120 V can replenish about 40 miles of electric range for a mid-size EV, and the EPA says many people with commutes under 40 miles a day find Level 1 sufficient to charge overnight. Longer daily drives or large batteries usually call for Level 2.

Sources

Written by Tobias. Updated October 22, 2026.