What is Michael Phelps's best times?

According to my calculations, It's around 8.5 minutes per Kilometer to 9.5 minutes per Kilometer. I don't think this is even possible to achieve by running on land even. ----

That speed is about correct (i checked his time records), however that is just over 4 miles per hour. Sprinters can go faster than 25 miles per hour. Use the google calculator. Ex: Phelps 200 meter Fly in 1:52:03 This is 1.8709 minutes, At google box type in: convert 200 m per 1.8709 minutes to miles per hour <- or convert 200 m per 1.8709 minutes to kilometers per hour <- Answer: 3.985 mph or 6.414 kph. That's 3.463 knots for you yachties.