30 F, 15 mph
- Celsius
- -7.2070528038 C
- Air temperature
- 30 F
- Wind speed
- 15 mph
The NWS formula is intended for cold temperatures with meaningful wind. Follow local weather alerts for frostbite risk.
Wind Chill Calculator
Use this free wind chill calculator to estimate what cold weather feels like from air temperature and wind speed.
Research-backed assumptions Formula steps Examples included Private in-browser use
Formula steps
- Use the National Weather Service wind chill equation.
- Raise wind speed to the 0.16 power.
- Combine temperature and wind terms to estimate exposed-skin heat loss.
How to use the wind chill calculator
- Enter air temperature in Fahrenheit and wind speed in miles per hour.
- Press Calculate wind chill to estimate the feels-like cold temperature.
- Use the formula mainly for cold, windy conditions.
- Follow local weather alerts for frostbite and outdoor safety decisions.
Common uses
Estimate wind chill before going outside.
Compare actual air temperature with feels-like temperature.
Convert the result to Celsius.
Understand wind chill limits and safety notes.
Examples
Feels colder than 30 F
Wind chill estimate
Severe feels-like estimate
Frequently asked questions
Plain-language answers about when to use the tool, what it does with your inputs, what to double-check, and how privacy works.
When should I use the Wind Chill Calculator?
Use it when your task matches one of these common needs: Estimate wind chill before going outside. Compare actual air temperature with feels-like temperature. It works best when you already know the values, dates, units, or settings the page asks for.
What is the Wind Chill Calculator doing with my inputs?
In plain language: The calculator uses the National Weather Service wind chill equation with air temperature in Fahrenheit and wind speed in miles per hour. The examples on the page are there so you can compare your inputs with a filled-out calculation before copying the answer.
What should I double-check before trusting the answer?
The formula is intended for cold temperatures with meaningful wind. Follow local alerts for frostbite and outdoor safety decisions. Also check that you used the right unit, date, scale, or mode because small input changes can change the result.
Does the site save what I enter?
No. The calculator runs in your browser tab. Your recent answers stay only on the page while you use it, and they are not sent to a server.