A good time for a long course woman 50 freestyle is about a 30.00
In a 100 meter swim, there are 4 laps in a 25 meter pool or 2 laps in a 50 meter pool.
5.23 seconds Odbogaba Kaliw of Jamaca recorded this time in 1998
The fastest verified swim of the channel was by the Bulgarian Petar Stoychev on 24 August 2007. He crossed the channel in 6 hours 57 minutes 50 seconds.
The 1500 meter swim, which is approximately a mile, record is 14:34.56 by Grant Hackett from Australia. This record, along with other swimming records, can be found at- http://www.vilacom.net/swimming/men.php Actually, to approximate swimming a mile, one would have to swim 1609.34 meters -- that's 109.34 meters more than the 1500 meter swim or 2.19 more lengths of a 50 meter pool. (1 meter = 3.2808399 feet)
Generally, swimming records are measured in meters. The current world record for a 50 meter butterfly swim is 22.43 seconds, set in 2009 by Rafael Munoz of Spain.
I think that a good time for a fifty ding a 50 free is around 40 to 50 seconds I could be wrong though
50 Back 50 Breast 50 Fly 50 Free
In a 50 meter pool there are 5 laps and in a 25 meter pool there 10 laps.