It depens, how long you've practice swimming. If you've swamm for years, you would probably swimm for aproximily 15 miles per hour. If you've only swamm for 1 year or less, you would swimm about 10 miles per hour or less.
^^ Joke answer right? The world record is like 5mph. The avg experienced swimmer probably 2 mph maybe 3. 3-5 kph. That's a guess, but a better answer than what's above.
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The average sperm can swim about 3 millimeters per minute. When traveling to an egg, a sperm swims at about 4 to 5 miles per hour. This number may fluctuate depending on the health of the person.
The fastest recorded swimming speed by a human is around 5-6 mph in short bursts or sprints. This speed is typically achieved by elite competitive swimmers during short distance races.
Dolphins can swim at speeds of up to 20-25 miles per hour (32-40 kilometers per hour).
The fastest human speed recorded is 27.8 mph, achieved by Usain Bolt during his 100m world record run in 2009.
About 761 mph
357 mph
2,410kmh is 1,497.505 mph