UK Tesla calculator
Tesla Cold-Weather Range Calculator (UK)
Winter range is where the WLTP figure lets you down. Slide to a UK winter temperature and pick your driving style to estimate the real miles you'll actually get — battery chemistry and cabin heating both take their toll.
Your figures
All figures are editable estimates, checked 2026-07-13. We never present a rate as fixed fact — see our sources.
Result
Estimate only — confirm live figures with Tesla and your suppliers.
How this is worked out
We apply a retained-range fraction at your chosen temperature to the car's WLTP range, then a driving-style factor. Estimates from published UK winter-range testing; real loss depends on speed, HVAC and preconditioning. The curve (100% at 20°C down to ~62% at −10°C) is drawn from published UK winter-range testing and is an estimate, checked 2026-07-13. Preconditioning the cabin while plugged in reduces the hit.
How the 256 mi figure above is calculated
Using this page's default inputs — a Model Y Long Range AWD at 0°C, mixed driving — here is every step.
- Look up the retained-range fraction at this temperature. The published curve gives 78% of WLTP range retained at 0°C. Estimates from published UK winter-range testing; real loss depends on speed, HVAC and preconditioning.
- Apply your driving-style factor. Mixed driving uses a
0.9factor:78% × 0.9= 70.2% effective range retained. - Apply that to the car's WLTP range.
real range = WLTP × effective retained%= 364 mi × 70.2% = 256 mi. - Express the loss as a percentage.
loss% = 1 − (real ÷ WLTP)= 1 − (256 mi ÷ 364 mi) = 30% lost.
Slide the temperature, change the driving style or pick a different model above and the same four steps recompute live. Estimates from published UK winter-range testing; real loss depends on speed, HVAC and preconditioning. Full list: Methodology & sources.
Where the winter range actually goes
Cold weather costs range through three separate mechanisms, and knowing which is which tells you what you can do about it — because two of them are recoverable and one isn't.
- Heating the cabin. The largest and most controllable slice. A combustion car heats the cabin with waste engine heat that it produces anyway; an EV has to make that heat from the battery. Cars with a heat pump do this far more efficiently than resistive heating, which is why two Teslas at the same temperature can lose noticeably different amounts.
- A cold battery being less willing. Chemistry slows in the cold. The pack delivers less readily, accepts charge more slowly, and some of its usable capacity is effectively unavailable until it warms. This is the part you cannot argue with — only pre-empt.
- Winter driving conditions. Denser air, wet or slushy roads and winter tyres all add drag. This gets attributed to the battery and mostly isn't the battery at all.
Worth separating two things people merge: range loss and capacity loss. A cold winter does not permanently reduce your battery. The range comes back when the weather does — unlike long-term degradation, which is a different and much slower phenomenon.
The single highest-value winter habit
Precondition while still plugged in. If you warm the cabin and battery using grid power before you unplug, you start the journey with a warm pack and a warm interior and you have spent none of your range doing it. Do the same thing after unplugging and the identical energy comes out of your battery.
On a cold morning that difference is the biggest lever available to you, and it costs nothing beyond remembering to set a departure time. It also improves rapid-charging speed later in the day, because a pack that started warm stays warmer.
Two smaller habits worth having: use seat heating in preference to cabin heating where you can, since warming a person takes a fraction of the energy of warming air; and accept that short trips are disproportionately expensive in winter, because you pay the heating cost on every one without ever reaching an efficient cruise.
What this means for planning a winter journey
Plan on the retained-range figure above rather than the WLTP number, and add margin on top of it. Then account for two compounding effects that a range figure alone hides: you will use more energy per mile and charge more slowly at the same stop, so a winter journey needs both more stops and longer ones than the same trip in summer.
The practical version: leave with more charge than you think you need, navigate to chargers in the car so the pack preconditions on approach, and treat the first winter trip as calibration rather than assuming the calculator — or any published figure — matches your car, your tyres and your right foot.
Questions
How much range does a Tesla lose in winter in the UK?
Expect roughly 15–25% less than the WLTP figure at UK winter temperatures (around 0–5°C), and more on fast motorway runs. Most of the loss is cabin heating and cold-battery efficiency, both of which ease once the car warms up.
Does preconditioning help winter range?
Yes. Warming the cabin and battery while still plugged in at home uses grid power rather than the battery, so you set off with a warm, efficient pack and keep more of your range.