CFLib.org – Common Function Library Project

Description:
This is an almost all inclusive function to convert temperatures between common formats. I haven't included the Rankine and Reaumure scales with this edition but they will be coming soon. The function uses two-character strings to perform the required action. For example: CF converts Celsius to Fahrenheit FC converts Fahrenheit to Celsius KC converts Kelvin to Celsius CK converts Celsius to Kelvin FK converts Fahrenheit to Kelvin KF converts Kelvin to Fahrenheit so the funtcion call would look like so: tempconvert('30','CF') this will convert 30 degrees Celsius to the equivalent temperature Fahrenheit.

Return Values:
Returns a string.

Example:

<cfset convertType = 'CF'>
<cfset convertThis = '30'>

<cfoutput>#tempconvert(convertThis,convertType)#</cfoutput>

Parameters:

Full UDF Source:

<!---
 Converts temperatures from and to Celsius, Fahrenheit and Kelvin.
 
 @param otemp      Temperature. (Required)
 @param ctype      Two character string that determines the conversion. (Required)
 @return Returns a string. 
 @author Jack Poe (jackpoe@yahoo.com) 
 @version 1, April 9, 2007 
--->
<cffunction name="tempConvert" output="false" returnType="string">

    <cfargument name="otemp" required="yes" type="numeric">
    <cfargument name="ctype" required="yes" type="string">
    
    <cfif arguments.ctype IS 'CF'>
        <cfset convertedtTemp = (arguments.otemp*1.8)+32>
        <cfset convertedtTemp = convertedtTemp & '&ordm; F'>
        <cfreturn convertedtTemp>
    <cfelseif arguments.ctype IS 'FC'>
        <cfset convertedtTemp = (arguments.otemp-32)*0.5555>
        <cfset convertedtTemp = convertedtTemp & '&ordm; C'>
        <cfreturn convertedtTemp>
    <cfelseif arguments.ctype IS 'CK'>
        <cfset convertedtTemp = arguments.otemp+273.15>
        <cfset convertedtTemp = convertedtTemp & '&ordm; K'>
        <cfreturn convertedtTemp>
    <cfelseif arguments.ctype IS 'KC'>
        <cfset convertedtTemp = arguments.otemp-273.15>
        <cfset convertedtTemp = convertedtTemp & '&ordm; C'>
        <cfreturn convertedtTemp>
    <cfelseif arguments.ctype IS 'FK'>
        <cfset convertedtTemp = ((arguments.otemp-32)*0.5555)+273.15>
        <cfset convertedtTemp = convertedtTemp & '&ordm; K'>
        <cfreturn convertedtTemp>
    <cfelseif arguments.ctype IS 'KF'>
        <cfset convertedtTemp = ((arguments.otemp-273.15)*1.8)+32>
        <cfset convertedtTemp = convertedtTemp & '&ordm; K'>
        <cfreturn convertedtTemp>
    </cfif>

</cffunction>