Wind Chill Calculator
Calculate how cold the wind makes the air feel using the official US/Canada NWS formula (2001).
Inputs
Wind chill temperature
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In Celsius
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Wind chill effect
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Frostbite risk
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Actual air temp
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About Wind Chill Calculator
Why wind chill
Wind strips away the thin layer of warm air your body produces, accelerating heat loss. Wind chill quantifies this — what bare skin "feels". It does not affect non-living things like water pipes.
Frostbite times
Bare skin at -25°F wind chill: frostbite in 10 minutes. At -45°F: 5 minutes. At -65°F: 2 minutes. Cover all exposed skin in extreme cold.
Why temps > 50°F have no wind chill
Above 50°F, wind cools you by evaporation more than convection — and the math no longer reflects perceived temperature. The formula is officially valid only at ≤50°F.