Yards to Short course meters (or even long course)

I know that there are sites/programs and maybe even tables out there for converting times from yards to meters. But do they work for everyone? last april I was able to swim a 200 yard pushing it hard but not max for a 2:03 which according to one site would mean I could swim roughly 2:17 at practice in a meters pool. today i pushed a 200 and hit the wall at 2:25 or so. I started thinking about it for the rest of practice and decided that my yards times are much faster than my meters time converted because my body type benefits greatly from taking 2-4 less strokes/length as well as getting that break on the turn earlier. anyone have recent times in yards and meters that could test any of the converting sites and see if they are even close. here's the one I use more often www.swimmingworldmagazine.com/.../conversions.asp