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Weather Calculators and Converters

Temperature Conversion | Wind Chill | Relative Humidity | Heat Index


Here are a selection of Java based calculators which will allow you to calculate most of the more common temperature related items.  We'll add to this over time to give a comprehensive set of tools.  The temperature scripts were written by Ron Murphy.

 

Temperature Conversion

Enter a number then click on the appropriate number to see the result.

Fahrenheit ( o F )
Celsius ( o C )

 

New vs. Old Windchill Calculation (°F)

The formula was changed back in 2000 (click here to see the details and background) but this neat little tool shows the various effects.

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Index Index

Old Windchill Calculation (°C)
Enter in the air temperature ( Tair ) in degrees Celsius and wind speed in miles per hour, then click on the Calculate WC to compute the windchill ( WC ).
Tair o C mph
Relative Humidity Calculation

Enter in the air temperature ( Tair ) and dew point temperature ( Tdp) in degrees Fahrenheit ( oF ) then click on the Calculate RH to compute the relative humidity ( RH ).
Tair ( o F ) Tdp ( o F ) RH
Tair
Tdp


Enter in the air temperature ( Tair ) and dew point temperature ( Tdp) in degrees Celsius ( oF ) then click on the Calculate RH to compute the relative humidity ( RH ).
Tair ( o C ) Tdp ( o C ) RH
Tair
Tdp

Heat Index Calculation
Valid entries are, air temperatures greater than 80 °F ( 27 °C ), dew point temperatures greater than 65 °F ( 12 °C ), and relative humidities higher than 40 percent.

in Celsius

Enter in the air temperature ( Tair ) and the dew point temperature ( Tdp ) in degrees Celsius, then click on the Calculate HI to compute the heat index ( HI ).

Tair in °C Tdp in °C RH =

in Fahrenheit

Enter in the air temperature ( Tair ) the dew point temperature ( Tdp ) in degrees Fahrenheit, then click on the Calculate HI to compute the heat index ( HI ).

Tair in °F Tdp in °F RH =

in Celsius

Enter in the air temperature ( Tair ) in degrees Celsius and relative humidity ( RH ) in percent ( without the % sign ), then click on the Calculate HI to compute the heat index ( HI ).

Tair in °C RH Tdp =

in Fahrenheit

Enter in the air temperature ( Tair ) in degrees Fahrenheit and relative humidity ( RH ) in percent ( without the % sign ), then click on the Calculate HI to compute the heat index ( HI ).

Tair in °F RH Tdp =
 

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