Wind Chill Calculator

NWS 2001 wind-chill formula with frostbite-time guidance.

Calculator Numbers & Math Updated Apr 20, 2026
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How to Use
  1. Enter air temperature and wind speed.
  2. Valid for T ≤ 50°F and wind ≥ 3 mph.
Input
Feels-like

Formula

NWS 2001
WC = 35.74 + 0.6215·T − 35.75·V^0.16 + 0.4275·T·V^0.16 (T°F, V mph)
Frostbite
WC ≤ 0°F → 30 min · ≤ −19°F → 10 min · ≤ −35°F → 5 min

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