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EV Range Estimator
Rated range is a lab number. Enter your battery capacity and efficiency, pick your driving mix and the weather, and this calculator estimates the range you will actually get, in miles or kilometers.
-Real-world range
-Rated range
-Range lost to conditions
The range formula
Rated range is battery capacity times efficiency: a 60 kWh battery at 4.2 miles per kWh gives 252 miles of rated range. Real-world range multiplies that by two derating factors, one for speed and one for temperature, because driving fast increases aerodynamic drag and cold weather (or air conditioning) draws extra energy.
Worked example
Battery 60 kWh, rated efficiency 4.2 mi/kWh.
- Rated range = 60 x 4.2 = 252 mi.
- Highway (0.8) in cold weather (0.75): real = 252 x 0.8 x 0.75 = 151 mi.
- Range lost = (1 - 0.6) x 100 = 40%.
Why cold weather hurts range
Lithium batteries deliver less usable energy when cold, the cabin heater is one of the biggest power draws in an EV, and cold air is denser, which adds drag. Together these effects routinely cut winter range by 25 to 40 percent compared with mild weather.
How to get more real range
Drive a little slower on highways, precondition the cabin while plugged in, keep tires at the recommended pressure, and use seat heaters instead of blasting cabin heat. Each of these shifts the effective speed and temperature factors in your favor.
Planning estimate only. Results use the list prices shown and may differ from your actual bill. Terms
Frequently asked questions
What does EV efficiency mean?
Efficiency is distance traveled per unit of energy, for example 4.2 miles per kWh, or its inverse, energy per distance, like 150 watt-hours per kilometer. The calculator accepts all three common formats and converts them automatically.
Why does cold weather reduce EV range?
Cold slows the battery's chemistry so less energy is usable, the cabin heater draws several kilowatts continuously, and denser cold air adds aerodynamic drag. That is why winter highway trips show the biggest drops.
What is the difference between rated and real range?
Rated range comes from a standardized lab test at moderate speed and temperature. Real range applies derating factors for how you actually drive, so it is the number to use when planning a trip.
Does air conditioning matter?
Yes, but less than heating does. Running the AC typically costs about 5 to 15 percent of range, which this calculator models with a 0.9 factor for hot weather with the AC on.