Wind Chill Calculator
What the air feels like on exposed skin.
Your numbers
°F
Your results
Wind chill (°F)
Wind chill (°F)
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Wind chill (°C)
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Feels colder by (°F)
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Wind Chill Calculator by TheCalcTools
How the Wind Chill Calculator works
Enter the air temperature and sustained wind speed.
The NWS formula estimates the rate of heat loss from exposed skin.
Results apply only at or below 50°F with winds of at least 3 mph.
The formula
WC = 35.74 + 0.6215 T − 35.75 V^0.16 + 0.4275 T V^0.16T in °F, V in mph
Worked example
Using the default values shown in the calculator:
| Air temperature (°F) | 20 °F |
|---|---|
| Wind speed (mph) | 15 mph |
- At 20°F with a 15 mph wind, WC = 6.2°F (-14.3°C).
- It feels 13.8°F colder than the air temperature.
Result:
| Wind chill (°F) | 6.2 |
|---|---|
| Wind chill (°C) | -14.3 |
| Feels colder by (°F) | 13.8 |
Frequently asked questions
Does wind chill change the real temperature?
No. Objects do not cool below the air temperature. Wind chill describes how fast exposed skin loses heat.
When is frostbite a risk?
At wind chills below about −18°F (−28°C) exposed skin can freeze within roughly 30 minutes. Cover skin in cold winds.
Sources and further reading
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This calculator gives estimates for information only. Check important results independently before you rely on them. See our disclaimer.