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Which time conversion tool do you think is most accurate from LCM to SCY?

Elaine Krugman

I swam in my first LCM meet since 2018, this past weekend, less than a week after competing at the National Senior Games. Curious to see how my LCM times converted to SCY, I ran them through five different time conversion tools I found in a Google search, so I could compare my race results between the two meets.  Yikes!  Not only were the time conversions inconsistent, Swimming World's tool was way off compared to the others.  Take my 200 LCM backstroke time of 4:05.87. Swimming World converted it to 3:33.66, and four other tools converted it to 3:41.50, 3:40, 3:45.40, and 3:39.34.  My previous best time in that event in the 60-64 age group was 3:39.7 in May, 2024.  I have been working on my stroke technique in that event, so it would be nice to believe the Swimming World converted time, but how accurate is it?  The converted times are all over the board!  My converted 200 IM time had an even larger differential.  Swimming World's converted time was nine seconds faster than two of the other conversion tools!

I am curious to hear which time conversion tool you all think is the most accurate.  Thanks!

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    For me, the on-line LCM --> SCY converters are typically overly optimistic. (My SCY times aren't as fast as the converters predict.)

    In backstroke events to convert SCY to LCM I use: (SCY time)*1.11 + 1.1*(# missing turns).

    So I suppose the reverse is: {(LCM time) - 1.1*(# extra turns)}/1.11

    By this formula:

    4:05.87 LCM--> 3:37.64

    I would throw out the 3:33.66 estimate. The range given by the others is probably quite reasonable [3:39.34-3:41.50]. That's only a 2s range in  200m event. It's going to be hard to do better than that with a converter. I would tend to favor the quick side of that range. I would say that, within the margin of error, you are at least as fast as your were 15 months ago, possibly a whisker faster.

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    For me, the on-line LCM --> SCY converters are typically overly optimistic. (My SCY times aren't as fast as the converters predict.)

    In backstroke events to convert SCY to LCM I use: (SCY time)*1.11 + 1.1*(# missing turns).

    So I suppose the reverse is: {(LCM time) - 1.1*(# extra turns)}/1.11

    By this formula:

    4:05.87 LCM--> 3:37.64

    I would throw out the 3:33.66 estimate. The range given by the others is probably quite reasonable [3:39.34-3:41.50]. That's only a 2s range in  200m event. It's going to be hard to do better than that with a converter. I would tend to favor the quick side of that range. I would say that, within the margin of error, you are at least as fast as your were 15 months ago, possibly a whisker faster.

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