Usain Bolt's fastest speed was recorded during his world record 100-meter sprint in 2009, where he ran the distance in 9.58 seconds. This corresponds to an average speed of about 37.58 kilometers per hour (23.35 miles per hour). However, his top speed during this sprint was even higher; at around 67 meters into the race, Bolt reached a peak speed of approximately 43.99 kilometers per hour (27.33 miles per hour). This makes him the fastest recorded human in terms of running speed.