Swimming pace refers to the time required to swim a certain distance, usually calculated by the time required to swim 100 meters. The calculation formula of swimming pace is as follows: pace (sec/100 m) = time (sec)/distance (m) × 100. For example, it takes 6 minutes and 30 seconds to swim 400 meters, so the pace is: pace (seconds/100 meters) =6×60+30 (seconds) /400 (meters) × 100= 1 37.5 seconds /65438.