Time Conversion Accuracy

Former Member
Former Member
Ok, so i'm wondering how accurate the below time conversion tool is (any opions?) www.swimmingworldmagazine.com/.../conversions.asp Here is why i'm asking... If this tool is accurate it means that during my first meet this past weekend I made the National cut (based on 2011 SCY time standars) in the 50F and 100 BR!! This is very exciting to me and makes me want to start swimming more frequently and seriously. This is what the conversion tool indicated ... 50F LCM @ 33.21 = 50F SCY 28.56 (NAT QUAL time 29.14) 100 BR LCM @ 1:34.85 = 100 BR SCY 1:21.19 (NAT QUAL time 1:22.87) I think my fever has returned! Man how I have missed this sport! Also, does USMS accecpt conversion times for qualification?
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  • The Swimming World Time Conversion Utility is internally inconsistent. I ran into this just the other day, while reviewing my (alas, converted) entry times to LCM nats. Try this: Select Gender = MALE, Event = 100 Backstroke, SCY Time = 1:05.00 Convert SCY 1:05.00 to SCM = 1:12.54 Convert SCM 1:12.54 to LCM = 1:14.71 Convert LCM 1:14.71 to SCY = 1:02.38 (not 1:05.00) Now try the other way, Select Gender = MALE, Event = 100 Backstroke, SCY Time = 1:05.00 Convert SCY 1:05.00 to LCM = 1:17.84 Convert LCM 1:17.84 to SCM = 1:15.58 Convert SCM 1:15.58 to SCY = 1:07.72 (not 1:05.00) Now try your favorite event. Convert SCY to SCM to LCM to SCY. What do you get? In fairness to the converter, the page explicitly says, These factors will allow you to convert metric times achieved in a 25-meter or 50-meter pool to an equivalent time for a 25-yard pool, or vice-versa. In other words, you can go from meters to yards, or yards to meters, but don't try to go from meters to meters. In my experience, the conversions from yards to SCM or LCM are reasonably accurate, but the conversion from SCM to LCM is not. So to convert an SCM time to LCM, first convert SCM to SCY, then convert SCY to LCM. Select Gender = MALE, Event = 100 Backstroke, SCM Time = 1:12.54 Convert SCM 1:12.54 to SCY = 1:05.00 Convert SCY 1:05.00 to LCM = 1:17.84 For my case, this conversion is closer to accurate. Bottom line: Duh? If it is necessary to go through yards to get a consistent conversion from SCM to LCM, why isn't that done internally? Either it should be done internally, or the SCM to LCM conversion feature should be disabled.
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  • The Swimming World Time Conversion Utility is internally inconsistent. I ran into this just the other day, while reviewing my (alas, converted) entry times to LCM nats. Try this: Select Gender = MALE, Event = 100 Backstroke, SCY Time = 1:05.00 Convert SCY 1:05.00 to SCM = 1:12.54 Convert SCM 1:12.54 to LCM = 1:14.71 Convert LCM 1:14.71 to SCY = 1:02.38 (not 1:05.00) Now try the other way, Select Gender = MALE, Event = 100 Backstroke, SCY Time = 1:05.00 Convert SCY 1:05.00 to LCM = 1:17.84 Convert LCM 1:17.84 to SCM = 1:15.58 Convert SCM 1:15.58 to SCY = 1:07.72 (not 1:05.00) Now try your favorite event. Convert SCY to SCM to LCM to SCY. What do you get? In fairness to the converter, the page explicitly says, These factors will allow you to convert metric times achieved in a 25-meter or 50-meter pool to an equivalent time for a 25-yard pool, or vice-versa. In other words, you can go from meters to yards, or yards to meters, but don't try to go from meters to meters. In my experience, the conversions from yards to SCM or LCM are reasonably accurate, but the conversion from SCM to LCM is not. So to convert an SCM time to LCM, first convert SCM to SCY, then convert SCY to LCM. Select Gender = MALE, Event = 100 Backstroke, SCM Time = 1:12.54 Convert SCM 1:12.54 to SCY = 1:05.00 Convert SCY 1:05.00 to LCM = 1:17.84 For my case, this conversion is closer to accurate. Bottom line: Duh? If it is necessary to go through yards to get a consistent conversion from SCM to LCM, why isn't that done internally? Either it should be done internally, or the SCM to LCM conversion feature should be disabled.
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