[!--quoteo(post=368611:date=Apr 25 2006, 10:41 PM:name=sanfly)--][div class=\'quotetop\']QUOTE(sanfly @ Apr 25 2006, 10:41 PM) [snapback]368611[/snapback][/div][div class=\'quotemain\'][!--quotec--] Im not quite sure if i understand what you're asking but anyway, to do any maths on a date or time, you need to convert to a unix time stamp with [a href=\"http://php.inspire.net.nz/manual/en/function.mktime.php\" target=\"_blank\"]mktime()[/a] ]. You can then put it back into a normal format using [a href=\"http://php.inspire.net.nz/manual/en/function.date.php\" target=\"_blank\"]date()[/a] [/quote] The field in question already does this, I think. The data is listed in the format I want: Field: TotalBlockTime Data in this field is listed as: 02:15:33 I want to get the total TotalBlockTime of all rows.