Wind Chill Calculator
Calculate the wind chill temperature using the official NWS formula. Includes frostbite risk thresholds.
About the Wind Chill Calculator
Wind chill describes the cooling effect of wind on exposed human skin. As wind increases, it carries heat away from the body more rapidly, making the air feel colder than the actual temperature. The NWS formula, adopted in 2001, is based on controlled experiments with human subjects and is considered the most accurate model for North America. For the opposite effect—how humidity makes hot temperatures feel worse—see our Heat Index Calculator.
The wind chill formula applies only when temperature is at or below 50°F (10°C) and wind speed is at least 3 mph (5 km/h). Frostbite can occur when the wind chill drops below about -18°F (-28°C)—exposed skin can freeze in as little as 30 minutes. For atmospheric moisture conditions, our Dew Point Calculator can help assess humidity and comfort levels.
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