Built and fact-checked by the DocNectar team — see our editorial standards
Key Features
Instant Calculation
Get accurate results in real time with our optimized algorithm.
Mobile Friendly
Fully responsive design. Works on all devices & screen sizes.
Privacy Focused
Your data stays on your device. We don't store any inputs.
100% Free
No hidden costs. This tool is completely free forever.
Wind chill describes how much colder moving air makes exposed skin feel compared to the actual air temperature.
This calculator applies the official U.S. National Weather Service wind chill formula to find the wind chill temperature from air temperature and wind speed.
How it works
Enter the air temperature in °F and wind speed in mph. The calculator applies the 2001 NWS wind chill formula \(WC = 35.74 + 0.6215T - 35.75V^{0.16} + 0.4275TV^{0.16}\), valid for temperatures at or below 50°F and wind speeds of 3 mph or more.
- Enter air temperature (°F).
- Enter wind speed (mph).
- Click Calculate to see your results.
Examples
0°F with 15 mph wind
At 0°F air temperature with a 15 mph wind, the wind chill is about -19°F — meaning exposed skin loses heat as fast as it would at -19°F with no wind.
Who should use it
- Checking how cold it will actually feel before heading outdoors in winter weather.
- Understanding frostbite risk based on a forecasted wind chill value.
Industry applications
- Meteorology and weather forecasting
- Outdoor work safety and winter sports
Advantages
- Uses the official, standardized NWS wind chill formula.
- Matches the wind chill values reported in official weather forecasts.
Limitations
- Only valid within the NWS-specified range (≤50°F, wind ≥3 mph).
Common mistakes to avoid
- Applying wind chill readings above 50°F, where the formula isn't designed to apply.
- Confusing wind chill (a "feels like" temperature) with the actual measured air temperature.
Best practices
- Use wind chill values to judge frostbite and hypothermia risk for time spent outdoors, not as the literal thermometer reading.
Tips
- A wind chill below -18°F (-28°C) can cause frostbite on exposed skin in as little as 30 minutes — a commonly cited safety threshold.