Cold temperatures can feel much colder based on the speed of the wind. This effect is called the Wind Chill Factor. To calculate wind chill, enter the current temperature in degrees Fahrenheit (°F) and enter the wind speed in miles per hour (MPH) - (statute miles per hour); if you don't know these values in °F or MPH, enter them in °C (Celsius) and Knots (nautical miles per hour), or KmPH (kilometers per hour) in their appropriate fields. Click on the Calculate button for the corrected Wind Chill effect. It will be displayed in degrees Fahrenheit and Celsius. There are two formulae for calculating the wind chill effect; one called the Old formula and the other (obviously) the New formula.

Required Data Entry
Temperature °C             °F 
Wind Speed MPH (Statute)
   MPH (Nautical)
        KmPH (Kilometers)
                     
Calculated Results
Wind Chill Old °F    °C       New °F    °C
Wind speeds of less than 5 MPH Statute have virtually no wind chill factor on the old formula and less than 3 MPH Statute have little or no effect on the new formula!

Version 1.0.0