If you are an average swimmer, you can swim about 2 miles per hour. This is about the same as swimming the 50-meter length of an Olympic-sized pool in 56 seconds.
The swimmer’s speed depends on many things, like how fit they are, how much they train, and what stroke they use. The front crawl is the fastest and most effective stroke for most swimmers.
With the right training, a swimmer in good shape can swim the front crawl faster than 4 miles per hour. The current record for the 50-meter crawl is 20.91 seconds, which is the same as swimming 5.39 miles per hour.