Wind Chill Calculator
Calculate wind chill factor using NWS formula. See frostbite risk time and danger level.
Wind Chill Temperature
6°F
Extreme Cold
Actual Temp
20°F
Feels Like
6°F
Frostbite Risk
10-30 minutes
What to Wear
Heavy insulation required. Minimize time outdoors. Protect all exposed skin.
Wind Chill at Various Wind Speeds
| 5 mph | 13°F |
| 10 mph | 9°F |
| 15 mph | 6°F |
| 20 mph | 4°F |
| 25 mph | 3°F |
| 30 mph | 1°F |
| 40 mph | -1°F |
Wind chill is calculated using the National Weather Service formula. It estimates how cold it feels on exposed skin based on air temperature and wind speed. Always monitor for signs of frostbite and hypothermia in cold conditions.
Use the Wind Chill Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.
Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.
How It Works
Our Wind Chill Calculator helps you determine the 'feels like' temperature when wind is present, using the official National Weather Service (NWS) formula. Understanding the wind chill factor is crucial for safety, as it indicates the effective temperature your body experiences, which can be significantly lower than the actual air temperature. This information is vital for planning outdoor activities in 2026, helping you dress appropriately and avoid cold-related injuries.
This calculator employs the NWS wind chill formula: Wind Chill (ºF) = 35.74 + 0.6215T - 35.75(V^0.16) + 0.4275T(V^0.16), where T is the actual air temperature in Fahrenheit and V is the wind speed in miles per hour. This formula was developed through extensive research, including advanced heat transfer models and human subject testing, to accurately reflect how wind accelerates heat loss from exposed skin. The calculation also estimates frostbite risk time and danger level based on these factors.
Remember that wind chill only applies to exposed skin; it does not affect objects or protected areas of the body. Always use actual air temperature for determining freezing pipes or vehicle fluid concerns, not wind chill. A common mistake is underestimating the speed at which frostbite can occur, especially in strong winds and low temperatures.
Example: Hiking in the Rocky Mountains, January 2026
- 1 Input an air temperature of 10°F and a wind speed of 25 mph.
- 2 Using the NWS formula: Wind Chill = 35.74 + 0.6215(10) - 35.75(25^0.16) + 0.4275(10)(25^0.16). This calculates to approximately -13.5°F.
- 3 The calculated wind chill is -14°F (rounded). At this wind chill, exposed skin could experience frostbite in as little as 10-15 minutes.
- 4 This indicates a 'High Danger' level. It is crucial to wear multiple layers, cover all exposed skin, and limit time outdoors to prevent severe cold-related injuries like frostbite and hypothermia. Recheck conditions frequently, as wind speeds can fluctuate rapidly in mountainous terrain.
Source: NWS · Last updated: April 2026
Frequently Asked Questions
What is wind chill and how is it calculated?
At what wind chill is frostbite a danger?
Does wind chill affect objects like car engines?
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