Wind Chill Calculator
Free wind chill calculator using the NWS formula. Calculate the apparent temperature based on air temperature and wind speed instantly.
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Calculate the Real Feel Temperature in Cold Weather
Wind chill tells you how cold it actually feels when wind is factored in with the air temperature. Wind increases the rate of heat loss from your body, making it feel colder than the actual temperature. Our calculator uses the official NWS wind chill formula.
What Is Wind Chill?
Wind chill, also known as wind chill temperature or apparent temperature, combines air temperature and wind speed to determine how cold it feels to the human body. Wind accelerates heat loss from exposed skin, making cold temperatures feel even colder.
NWS Wind Chill Formula
WC = 35.74 + 0.6215T - 35.75V^0.16 + 0.4275T×V^0.16Why Calculate Wind Chill?
Frostbite Prevention
Know when exposed skin is at risk of frostbite.
Winter Activity Planning
Plan outdoor activities safely in cold weather.
Health Protection
Protect vulnerable individuals from hypothermia.
How to Use This Calculator
Common Applications
Winter Sports
Skiers, snowboarders, and ice skaters monitor wind chill for safety.
Outdoor Work
Construction and utility workers use wind chill for cold stress protocols.
School Closures
Schools monitor wind chill for outdoor recess and bus stop safety.
Pet Care
Determine safe outdoor time limits for pets in winter.
Frequently Asked Questions
A wind chill of -20°F (-29°C) or lower is dangerous. Frostbite can occur on exposed skin in 10-30 minutes. Below -40°F/°C, frostbite can occur in under 5 minutes.