EV Winter Range Calculator

On average about 20–35% at 20°F (−7°C) with the cabin heater on. Recurrent Auto's study of 30,000+ EVs found the typical car retains roughly 70% of its EPA range at 20°F and around 80% at freezing (32°F). Roughly half of the loss is the battery itself — lithium-ion chemistry is less efficient when cold — and half is cabin heating. The single biggest variable is whether the car has a heat pump: heat-pump EVs average about 83% of range retained in the cold versus about 75% without one. A 300-mile EV therefore typically delivers 200–240 real miles on a 20°F day.

Two things stack up. First, the battery: in cold weather the electrolyte thickens, internal resistance rises, and more of the pack's stored energy is wasted as heat instead of reaching the motor — and regenerative braking is limited until the pack warms up. Second, cabin heating: unlike a gas car, which heats the cabin for free with waste engine heat, an EV has to spend battery energy to make warmth. A resistive (PTC) heater turns a kWh of electricity into a kWh of heat — efficient as an appliance, brutal as a range tax. That heating load, not the battery, is usually the larger of the two hits.

Yes, materially. A heat pump moves heat from the outside air into the cabin instead of generating it, delivering 3–4 kWh of warmth per kWh of electricity at moderate temperatures. In the cold that advantage shrinks — below about 10°F many systems blend in resistive backup — but across a winter it's worth several percent of range. Recurrent's fleet data shows heat-pump EVs retaining ~83% of range in freezing weather versus ~75% for resistive-heat cars. Tesla (2021+), Hyundai/Kia E-GMP models, GM's Ultium cars, the 2024+ F-150 Lightning, and Rivian all use heat pumps; the US-market VW ID.4 and many older EVs do not.

Precondition while plugged in — warm the cabin and battery on grid power before you unplug so the energy doesn't come out of your pack. Use seat and steering-wheel heaters instead of blasting the cabin; they draw a fraction of the power. Keep the car plugged in overnight in the cold, drive a little slower, keep tires at the correct pressure, and precondition the battery before a DC fast charge so it actually charges quickly. Together these can recover 10–15% of the cold-weather loss.

Yes. A cold battery can't accept fast-charge current quickly, so a 10–80% session that takes 25 minutes in mild weather can stretch well past 45 minutes if the pack is cold and unconditioned. The fix is the same as for range: precondition the battery (most cars do this automatically when you navigate to a charger) so it reaches the right temperature before you plug in. Plan winter road trips around longer, more frequent stops.

It's a planning estimate. The model applies the same real-world range curves used across EVMath, calibrated to Recurrent Auto's 30,000-vehicle winter study and AAA heater-load testing, and splits the loss into cold-battery and cabin-heating components. Your actual number depends on trip length (short hops in deep cold are worst, because the car reheats a cold cabin and battery from scratch), wind, terrain, and how warm you keep the cabin. Treat the output as a realistic midpoint and keep a buffer in winter.