To convert miliseconds for Hours, you have two options: Use SQL to convert.Add Library to your Jasperserver or your Java ApplicationIn my case I've create a simple Java Lib and add to my Tomcat. Check the example of code public class Util { public String milisecondsToHours(int miliseconds) { int seconds = ( miliseconds / 1000 ) % 60; int minutes = ( miliseconds / 60000 ) % 60; // 60000 = 60 * 1000 int hours = miliseconds / 3600000; // 3600000 = 60 * 60 * 1000 return String.format( "%02d:%02d:%02d", hours, minutes,seconds ); }}[/code]Note: Just remember, Java has x86 and x64, and you have to compile correct architecture of your application