Charging Electric Cars in 2026: Calculating Charging Time and Realistically Estimating Range
Calculate charging time of e-cars
The charging time for electric cars depends primarily on two factors: the usable battery capacity in kilowatt-hours (kWh) and the charging power in kilowatts (kW). The following formula can be used to estimate charging times.
Formula for calculating the charging time of electric cars
Charging time in hours = battery capacity in kWh / charging power in kW
Sample calculation of electric car charging time
A vehicle with 77 kWh charges at a fast charging station with 125 kW for around 0.62 hours. That corresponds to around 37 minutes. In reality, the value fluctuates because vehicles do not charge continuously at maximum power.
Typical charging types and rough guide values for electric cars
- Household socket (2.3 kW): Only suitable for occasional charging. An empty battery takes many hours to charge, depending on its size.
- Wallbox (11 kW): The standard in companies and at home. A battery with 60 kWh takes roughly five to six hours from almost empty to full.
- Public AC charging (22 kW): Halves the time compared to 11 kW. The vehicle must support a 22 kW onboard charger, otherwise the car will be limited.
- DC fast charging (50 to over 300 kW): Delivers from 50 to over 300 kW, depending on the station and vehicle. In practice, the window from around 10 to 80 percent battery level is relevant because this is when the highest charging power is available.
Important: The shortest practice time rarely results from simple division. The charging power follows a curve. It increases after the start, remains stable in the optimum range and drops significantly from around 70 to 80 percent. When on the road, it is therefore usually worth charging up to around 80 percent and continuing to drive.
Other factors that influence the charging time of electric cars
Battery temperature and weather conditions: Batteries charge most efficiently at moderate temperatures. In extreme cold and heat, the battery management system reduces the current flow. Many vehicles offer preconditioning. The thermal management system brings the battery into a favorable temperature window before fast charging.
Start charge level and target charge level: The higher the battery level, the lower the charging power. This makes the last few percent significantly slower.
Vehicle-side limits: The onboard charger limits AC charging. In DC charging, cell chemistry and battery management limit the maximum output.
Voltage architecture of the vehicle: An increasingly important factor is the voltage architecture. Models with 800-volt technology (as used by Hyundai, Kia, Porsche and Audi, for example) can often maintain even higher and more stable charging performance over a longer period of time. In practice, this enables charging times from 10 to 80 percent in under 20 minutes at corresponding high-power charging (HPC) stations.
Charging losses: Conversion losses occur during charging. For rough planning purposes, a surcharge of around 10 percent on the amount of energy is a sensible reserve.
Station and utilization: The power may be reduced at shared charging points. The actual charging power depends on the station, the cable and the grid utilization.
Battery ageing: Batteries lose some capacity over years and cycles. This changes the range and charging window. Frequent DC charging is possible, but continuous maximum charging power over long periods of time increases ageing.
Calculate and realistically estimate the range of an electric car
The distinction between WLTP range and practical range is crucial. The WLTP measurement provides cross-manufacturer comparative values. In everyday life, the driving profile and conditions influence the actual distance.
Formula for Calculating Electric Vehicle Range
Range in km = (Usable battery capacity in kWh / average consumption in kWh/100km) * 100
Example of an electric car range calculation
(60 kWh / 17 kWh/100km) * 100 gives around 353 kilometers.
To put this into perspective: Many current passenger cars require between 14 and 22 kWh per 100 km in mixed operation. Compact vans and vans require more like 20 to 30 kWh per 100 km.
Factors that influence the range of electric cars
Weather: Cold increases the energy requirement due to heating power and the battery status. Heat requires cooling.
Tempo: Air resistance increases disproportionately with increasing speed. A range of 100 to 110 km/h is often efficient.
Vehicle design and tires: Aerodynamics, tire width and rolling resistance have a direct effect on fuel consumption.
Payload and roof attachments: Weight and attachments such as roof boxes reduce the range.
Consumers in the interior: Heating, air conditioning, seat and rear window heating increase demand.
Driving style and recuperation: Anticipatory driving and frequent coasting make use of energy recovery and noticeably improve the range.
E-car range comparison by vehicle class (WLTP values)
- Small car: approx. 250 to 400 km. Suitable for urban and rural areas.
- Compact class: approx. 350 to 550 km. Universal use including highway.
- Middle and upper class: approx. 500 to 700+ km. Long distances can be planned with short fast-charging breaks. Models in these classes, especially those with efficient 800-volt architecture, currently occupy the top positions in range lists and thus directly serve the search for electric cars with the longest range.
- Light commercial vehicles: approx. 200 to 350 km. Often ideal in the city with consistent intermediate charging.
Load planning for companies
Planning in loading windows: Charge up to around 80 percent on the road. Shorter stops are more efficient.
Use on-site charging: Overnight at the 11 kW wallbox provides predictable availability at calculable costs.
Load management and billing: Intelligent charging solutions distribute power, prioritize vehicles and simplify billing.
Simplify processes with Plug & Charge: The Plug & Charge function (in accordance with ISO 15118) is becoming increasingly important for company fleets. It enables automatic authentication and billing directly via the charging cable. All the driver has to do is plug in the vehicle – there is no need for a charging card or app. This simplifies the process, reduces administrative work and makes it easier to allocate charging costs to the exact vehicle.
Training for employees: A short guide to recuperation, speed and preconditioning increases the range in everyday life.
Electric car subscription with a wallbox partner and charging solution
If you’re looking to make the switch to electric vehicles without committing to a long-term contract, check out the the electric car subscription from MHC Mobility the perfect way to get started. The monthly payment includes maintenance, insurance, vehicle tax, and service. With a minimum term of one month, you can lease the electric car through FlexiRent Test it in everyday use before making a long-term decision about SelectRent or long-term electric car rental … MHC Mobility is partnering with its wallbox and energy partner, LichtBlick, to provide charging solutions and green electricity for commercial customers.
Electric car models available through the MHC Mobility car subscription service (Excerpt): Tesla Model 3 AWD Long Range and Tesla Model Y AWD Long Range for long-distance travel, Hyundai Kona EV as a compact city car, Audi Q4 Sportback as an electric SUV, Fiat 500e as a car designed purely for small-town driving, as well as Opel Combo-e and Opel Vivaro-e for the van segment. The current availability shows the Vehicle search.
FAQ: About e-car charging time and range
This depends on the battery, charging capacity and charging window. From 10 to 80 percent, a current vehicle often takes between 20 and 45 minutes at a DC fast charger. At the 11 kW wallbox, 50 to 60 kWh take roughly five to six hours.
Divide battery capacity (kWh) by charging power (kW). In practice, take the charging window and charging losses into account.
It describes the actual power with which energy flows into the battery. It varies over the charging process.
Occasional fast charging is not critical. Continuously high charging rates can accelerate ageing.
To protect the battery cells, the system reduces the current and voltage.
The WLTP cycle has provided comparable manufacturer specifications since 2017. For everyday planning, you should still count on a practical reserve.
The term “kW” is used in two different ways when discussing electric cars: motor power and charging power. Today’s electric cars typically have motor power ranging from 100 to 350 kW. When charging, the maximum charging power depends on the vehicle: small cars usually 50 to 100 kW DC, mid-size cars 100 to 200 kW DC, and premium models with 800-volt architecture sometimes over 250 kW DC. For AC charging at home or at work, 11 kW (three-phase) is the standard.
The distance an electric car can travel depends on battery capacity and energy consumption. Small cars can travel about 250 to 400 kilometers on a full charge, compact cars 350 to 550 kilometers, and mid-size and luxury cars 500 to 700 kilometers or more. The real-world range is on average about 10 to 25 percent below the WLTP value, and in winter conditions, it can be significantly lower.
Depending on the battery size, the VW ID.3 has a range of between approximately 350 kilometers (smaller battery version) and over 550 kilometers (Pro S with larger battery) according to the WLTP. The actual range depends on driving style, outside temperature, and speed, and experience shows that it is slightly lower than that.
The Hyundai Kona EV Depending on the battery option, it achieves a WLTP range of approximately 380 to over 500 kilometers. In B2B use, the model has proven itself as a compact city and commuter car and is also available through the MHC Mobility car subscription service.
At their best, premium models with large batteries can achieve a WLTP range of over 700 kilometers. Models with 800-volt architecture (such as those from Hyundai, Kia, Porsche, and Audi) combine long range with exceptionally short charging times at fast-charging stations. Anyone looking for an electric car for commercial long-distance use should pay attention not only to the pure WLTP range but also to DC charging power, because fast charging has a greater impact on the total time of a trip than the maximum range from a standard outlet.
The basic formula is: Charging time in hours = battery capacity in kWh ÷ charging power in kW. Example: An electric car with a 60 kWh battery takes approximately 5.5 hours to charge at an 11 kW wallbox and about 1.2 hours at a 50 kW fast charger. In reality, the time is usually 10 to 20 percent longer due to the charging curve and charging losses. For the last 20 percent (80 to 100 percent), the battery management system significantly slows down the charging process.
If you want to test an electric car’s range and charging time in real-world business conditions before making a long-term purchasing decision, you’ll find the electric car subscription from MHC Mobility the most flexible option. The minimum term is one month; after that, the contract can be canceled on a daily basis. This allows you to test the selected model under real-world conditions using your own driving profile, without tying up capital and without any residual value risk.
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