Wind Chill Calculator
Last updated: June 2026 · Free · No sign-up required
Enter values above and click Calculate to see your result instantly.
Quick reference
| Wind chill | Frostbite risk |
|---|---|
| Above 0 °F | Low for short exposure |
| -1 to -18 °F | Frostbite in 30 minutes |
| -19 to -35 °F | Frostbite in 10 minutes |
| -36 °F and below | Frostbite in 5 minutes |
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Interpretation guide
| Factor | Effect |
|---|---|
| Higher wind speed | Strips body heat faster → feels colder |
| Applies at or below | 50 °F and wind above 3 mph |
| Only affects | Exposed skin / living things, not objects |
Formula & methodology
Formula: WC = 35.74 + 0.6215*T - 35.75*V^0.16 + 0.4275*T*V^0.16 (T in °F, V in mph)
How wind chill is calculated
Wind chill is the "feels-like" temperature in cold, windy conditions. Wind strips away the thin layer of warm air next to your skin, accelerating heat loss, so it feels colder than the thermometer reads.
Example
At 20 °F with a 25 mph wind: WC = 35.74 + 0.6215 x 20 - 35.75 x 25^0.16 + 0.4275 x 20 x 25^0.16. With 25^0.16 ≈ 1.700, WC ≈ 35.74 + 12.43 - 60.78 + 14.54 = 1.9 °F.
This uses the 2001 NWS/Environment Canada formula, valid at or below 50 °F with winds above 3 mph. Wind chill affects exposed skin and living things — it cannot cool an object below the actual air temperature.