Enter a number then click on the the
conversion button.
Wind Speed Calculations
mph knots
m/sec
km/hr
Wind Chill Calculation
Enter the temperature in degrees Fahrenheit and wind speed in mph,
then click on the Calculate WC to compute the windchill index.
Relative Humidity Calculation
Enter the air temperature
and the dew point in degrees Fahrenheit, then click on the Calculate RH to compute the relative humidity.
Heat Index Calculations
Enter the temperature in degrees Fahrenheit
and relative humidity (RH) in percent (without the % sign), or the Dew Point (Tdp).
Then click on the Calculate HI to compute the heat index (HI).
www.weather.gov 
