How this estimate works
Usable range is the EPA combined number times a retention rate from real US driving, not a new lab test. Recurrent 2025–2026 fleet study, as summarized in the FairRange winter range guide.
| Condition | Range kept | Source |
|---|---|---|
| Above about 50°F | 100% | Treated as the baseline the winter studies compare against |
| 32°F, heat pump | 83% | Recurrent, freezing, heat-pump EVs |
| 32°F, not sure | 78% | Recurrent fleet average at 32°F |
| 32°F, resistance heat | 75% | Recurrent, freezing, no heat pump |
| Around 20°F | 70% | Recurrent fleet average at 20°F |
A model can sit well above or below these averages. The spread at freezing in the same research ran from about 88% to 69%. For a named car, use the table in ourEV winter range loss guide. AAA’s 2019 lab test at 20°F with the heater on saw about a 41% loss, which is harsher than the 30% fleet average used here.
What “fits” means
- Comfortable — usable range is at least 2.5 commute days.
- Covers — one round trip still leaves about 20%.
- Tight — the round trip fits only if you are willing to arrive under 20%.
- Short — the round trip is longer than the winter usable range.
Cold also slows overnight charging on a regular outlet. If Level 1 is your plan, checkwhether Level 1 charging is enoughand run the charging cost calculator with a lower miles-per-kWh for a winter month.