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Wind Chill Calculator
Wind Chill Calculator
NWS formula — perceived temperature with wind speed
WC = 35.74 + 0.6215T − 35.75(V0.16) + 0.4275T(V0.16)
Wind Chill Temperature
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In °C
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In °F
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Feels colder by
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About the Wind Chill Calculator
Wind chill shows how cold it feels on exposed skin when wind is combined with a low air temperature.
How to use the Wind Chill Calculator
- Enter the Air Temperature and choose °F or °C.
- Enter the Wind Speed and choose mph, km/h or m/s.
- Press Calculate.
Formula and method
US National Weather Service formula (°F, mph): WC = 35.74 + 0.6215T − 35.75V^0.16 + 0.4275T·V^0.16. It applies for temperatures at or below 50 °F and wind speeds above 3 mph.
Worked example
At 20 °F with a 15 mph wind, the wind chill is about 6 °F.
When to use the Wind Chill Calculator
- Finding how cold it feels when wind is added to low temperatures.
- Deciding what to wear for winter activities.
- Judging frostbite risk.
Common mistakes to avoid
- Thinking wind chill lowers the actual temperature. It describes how quickly your skin loses heat.
- Using the formula in mild weather. It applies to cold conditions.
Tips
- Frostbite can occur on exposed skin in 30 minutes or less at very low wind chills.
- Cover skin and dress in layers.
Frequently Asked Questions
No. It describes how quickly you lose heat. Objects only cool down to the air temperature.
No. Wind chill affects people and animals, not objects, which only cool to the air temperature.