CFLib.org – Common Function Library Project

Description:
Converts degrees Rankine to degrees Celsius. Note that the Rankine temperature scale has an absolute zero (negative Rankine temperatures do not exist). If a temperature below 0 Rankine (absolute 0) is passed, the funciton will return an invalid result.

Return Values:
Returns a float.

Example:

<CFSET r=0>
<CFOUTPUT>
Given r=#r#<BR>
#r# degrees Rankine = #RankineToCelsius(r)# degrees Celsius.
</CFOUTPUT>

Parameters:

Full UDF Source:

<cfscript>
/**
 * Converts degrees Rankine to degrees Celsius.
 * Minor enhancements by Rob Brooks-Bilson (&#114;&#98;&#105;&#108;&#115;&#64;&#97;&#109;&#107;&#111;&#114;&#46;&#99;&#111;&#109;).
 * 
 * @param rankine 	 Degrees Rankine you want converted to degrees Celsius 
 * @return Returns a float. 
 * @author Tony Blackmon (&#114;&#98;&#105;&#108;&#115;&#64;&#97;&#109;&#107;&#111;&#114;&#46;&#99;&#111;&#109;&#102;&#108;&#117;&#105;&#100;&#64;&#115;&#99;&#46;&#114;&#114;&#46;&#99;&#111;&#109;) 
 * @version 1.0, September 17, 2001 
 */
function RankineToCelsius(rankine)
{
  Return (rankine-491.67)/1.8;
}
</cfscript>