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Temperature Conversions
Enter a number then click on the the conversion button.
Fahrenheit (o F)
Celsius (o C)

Wind Speed Calculations
Enter a speed into any blank to convert to all other wind speeds.
 mph  knots    m/sec   km/hr  

Wind Chill Calculations
Enter the temperature in degrees Fahrenheit and wind speed in mph,
then click on the Calculate WC to compute the windchill index.
Temp
(o F)
Wind
mph
Index

Relative Humidity Calculations
Enter the air temperature and the dew point in degrees Fahrenheit, then click on the Calculate RH to compute the relative humidity.
Temp
(o F)
Dew
Point

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).
Temp (o F)

RH

HI
Tdp
or
Temp (o F)
Tdp
HI RH

Station Pressure Calculations
Enter your altimeter in inches (i.e 29.92):   Your elevation in feet:     

Station Pressure in inches is    Pressure in millibars is    Pressure Altitude in feet is