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AutoHow range is calculated
The basic formula is simple: range = (battery capacity × charge level) / consumption × 100. However, actual range depends on many factors, so this calculator applies adjustment factors based on the selected driving conditions.
Why real-world range differs from the spec sheet
Official manufacturer figures (WLTP, EPA) are obtained under controlled test conditions that don't fully reflect real-world use. In practice, range is affected by:
- Air temperature: cold reduces the efficiency of chemical reactions in the battery, while heat requires energy for cabin cooling.
- Driving style: aggressive acceleration and high speed significantly increase energy consumption.
- Climate control: heating or air conditioning draws energy directly from the battery, unlike gas cars.
- Road type: highway driving at high speed often consumes more energy than city driving due to aerodynamic drag.
- Load and accessories: passenger and cargo weight, roof rack use.
Why winter range drops the most
Cold is the biggest enemy of EV range for two reasons: first, chemical processes inside lithium-ion batteries slow down at low temperatures, reducing available power. Second, cabin heating in cold weather requires significant energy that would come "for free" from an internal combustion engine in a conventional car. Together, these factors can reduce range by 20-40% in severe cold.
The result is an estimate based on typical driving condition impact factors. Actual range depends on the specific car model, driving style, and current weather conditions.
FAQ
Why does real-world range differ from the manufacturer's rating?
Official manufacturer figures are obtained under ideal laboratory conditions. Real-world driving involves temperature swings, driving style, climate control use, and terrain, which reduce actual range.
Why is range lower in winter?
Cold reduces the efficiency of chemical processes in the battery, and cabin heating draws energy directly from the battery, unlike gas cars where heat is a byproduct of the engine.
Should I charge the battery to 100% every day?
For daily use, charging to 80-90% is recommended, reserving a full charge for long trips only — this extends battery lifespan.