EV Charging Time and Cost Calculator
Work out how long an EV takes to charge from any percentage on Level 1, Level 2 or DC fast chargers, what the session costs and how many miles it adds.
The interactive tool loads here when JavaScript runs.
About this toolWhat is the EV Charging Calculator?
The EV Charging Time and Cost Calculator answers the questions every electric car owner asks: how long will this charge take, what will it cost, and how far will it get me? Enter the battery's usable capacity, the starting and target charge, and pick a charger, from a 120 V Level 1 outlet through 240 V Level 2 wallboxes and European three-phase units to 350 kW DC fast chargers.
With the defaults (a 75 kWh battery from 20% to 80% on a 240 V 32 A Level 2 charger at 18 cents per kWh) the charge takes 6 hours 31 minutes, draws 50 kWh from the wall to put 45 kWh in the battery, costs $9.00 and adds about 167 miles. A table underneath repeats the same session on every charger type so you can see what a faster charger would save.
Session fees and per-minute pricing are supported for public networks, and the car's own limits are respected: an 11 kW onboard charger caps a 22 kW wallbox, and DC charging slows down as the battery fills.
- Level 1, Level 2, European wallbox and DC fast charger presets
- Car onboard AC limit, DC peak and tapering DC curve
- Energy into the battery, energy billed and losses
- Cost with per-kWh, session and per-minute pricing
- Range added, comparison table across all chargers
How to use the EV Charging Calculator
- Enter the usable battery capacity and the starting and target charge in percent.
- Enter the car's onboard AC limit and peak DC rate from the manufacturer's specifications.
- Choose a charger preset, or type a custom power and pick AC or DC. Efficiency fills in automatically and can be changed.
- Enter your price per kWh, plus any session fee or per-minute charge, and your car's consumption to see range added.
- Read the time, cost and range, and compare the same charge across every charger in the table.
Worked examples
Overnight on a Level 2 wallbox
Input
75 kWh, 20% to 80%, 240 V 32 A (7.68 kW), 90%, $0.18/kWh, 30 kWh/100 mi
Output
6 h 31 min; 50 kWh from the wall; $9.00; about 167 miles (25.6 miles per hour of charging)
45 kWh / (7.68 kW x 0.9) = 6.51 hours.
The same charge on a Level 1 outlet
Input
120 V 12 A (1.44 kW), 85%
Output
36 h 46 min; $9.53; about 4.8 miles per hour of charging
Level 1 suits low daily mileage: an 8 to 10 hour night adds roughly 40 to 50 miles.
DC fast charging on a road trip
Input
10% to 80% on a 250 kW charger, car peak 170 kW, slows from 50%, 93%, $0.48/kWh
Output
About 23 minutes, $27.10, average 145 kW
Going on from 80% to 100% takes another 20 minutes for less than a third of the energy, which is why road-trippers usually stop at 80%.
Background and insight
Charging time is energy divided by power. The energy needed is battery capacity times the change in charge: 75 kWh x (80% - 20%) = 45 kWh. AC charging power is volts times amps: a Level 1 outlet supplies 120 V x 12 A = 1.44 kW, and a Level 2 charger on a 40 A circuit supplies 240 V x 32 A = 7.68 kW, because the National Electrical Code treats EV charging as a continuous load and limits it to 80% of the circuit rating. On AC the car's onboard charger converts to DC, so the actual power is the lower of the charger's rating and the car's onboard limit, commonly 7.2, 11 or 19.2 kW.
Some energy turns into heat in the charger, cables and battery. The tool divides by a wall-to-battery efficiency, 85% for Level 1, 90% for Level 2 and 93% for DC by default; these are editable assumptions, and published measurements vary with temperature and charging power. The price applies to the energy drawn from the wall, which is what your home meter records. Many public networks bill the energy their charger delivers, so if a network quotes its own kWh figure, set efficiency closer to 100%.
DC fast charging is limited by the car's charging curve. Batteries accept their peak power at low charge and then taper to protect the cells. The tool models this simply: the car holds its peak DC rate up to a slow-down point (50% by default) and then falls in a straight line to 15% of the peak at 100%, with the charger's rating as a cap. Real curves differ by model and temperature, so treat DC times as estimates and move the slow-down point to match your car.
Common use cases
Choosing a home charger
See how much faster a 48 A wallbox is than a 32 A one for your car, and whether your car can even use it.
Planning a road trip stop
Estimate how long a fast-charging stop will take and what it will cost.
Comparing tariffs
Compare home, workplace and public charging costs per session and per kWh added.
Living with Level 1
Check whether a standard outlet replaces your daily miles overnight.
Tips and limitations
- Use the usable battery capacity, not the gross figure; manufacturers often quote both.
- Cold batteries charge more slowly on DC. Preconditioning before a fast-charging stop helps.
- A wallbox faster than your car's onboard charger does not shorten AC charging time.
- Charging to 80% for daily use is common advice from manufacturers; set your target accordingly.
Frequently asked questions
How long does it take to charge an EV on Level 2?
Divide the energy needed by the charger power times efficiency. A 75 kWh battery from 20% to 80% needs 45 kWh; on a 7.68 kW charger at 90% efficiency that is about 6.5 hours. A 48 A (11.5 kW) charger cuts it to about 4.3 hours if the car accepts 11.5 kW.
Why is my 22 kW charger not charging faster?
Most cars have an onboard AC charger of 11 kW or less, and AC power cannot exceed it. A 22 kW wallbox on an 11 kW car charges at 11 kW. Only cars with a 22 kW onboard charger benefit.
Why does DC fast charging slow down after 80%?
Lithium-ion cells can only accept high current while they are relatively empty. As the cell voltage rises, the car reduces power to protect the battery, so the last 20% can take as long as the 10% to 80% portion.
How much does it cost to charge an EV at home?
Energy from the wall times your price per kWh. At the 2026 US average of about 18 cents, putting 45 kWh into a battery draws about 50 kWh and costs about $9, or roughly 5 to 6 cents per mile.
How many miles does Level 1 charging add per hour?
About 4 to 5 miles for a typical EV using 30 kWh per 100 miles, since a 120 V 12 A outlet supplies 1.44 kW and some is lost as heat.
How much energy is lost when charging an EV?
Part of the electricity becomes heat in the charger, cable and battery. The calculator assumes 85% to 93% efficiency by charger type, editable, and shows the kWh lost for each session.
Is there an in-depth guide to the EV Charging Calculator?
Yes. “How Long Does an EV Take to Charge? Level 1, Level 2 and DC” covers the background, how it works, common pitfalls and worked examples. Read the full guide.
People also search for
- how long to charge a 75 kwh battery
- level 2 charger charging time calculator
- home ev charging cost per session at 18 cents
- miles of range per hour of charging
- how long does level 1 charging take
- dc fast charging 10 to 80 percent time
- ev charging cost per session
- 11 kw vs 22 kw charger time
Related Tools You May Like
Free, in-browser tools that pair well with this one.