Wind Chill Calculator

U.S. or Metric Units

The wind chill index combines the temperature with the wind speed to indicate how cold it actually feels outside, particularly to unprotected skin exposed to the wind. These calculators are based upon the revised formula of August 2, 2001, which is available at

Note: Frostbite occurs in 15 minutes or less at wind chill values of -18° Fahrenheit (-28° Celsius) or lower.

Calculate U.S. Wind Chill Index

Calculate Metric Wind Chill Index