Convert Mach (20°C, 1 atm) (Ma (20°C)) to Running Speed (run) instantly.
About these units
Mach (20°C, 1 atm) (Ma (20°C))
At 20°C and 1 atmosphere, the speed of sound in air is about 343 m/s, making Mach 1 = 343 m/s under those conditions. Mach numbers classify aerodynamic regimes: Mach 0.3–0.8 (Subsonic), Mach 0.8–1.2 (Transonic), Mach 1–5 (Supersonic), Mach 5+ (Hypersonic). Temperature influences Mach speed significantly; colder air slows sound, while warmer air increases its speed. Aircraft design, jet engines, wind tunnels, aerospace testing, and atmospheric re-entry physics all rely heavily on Mach numbers referenced to standard conditions.
Running Speed (run)
Human running speeds range widely: Average jogging (2.5–3.3 m/s or 9–12 km/h), Sprint speeds (8–12 m/s or 29–43 km/h). Elite sprinters can exceed 12 m/s, with Usain Bolt's peak reaching approximately 12.4 m/s. Running is biomechanically complex, involving elastic energy return, stride mechanics, ground-reaction forces, and cardiovascular performance. Sports science uses running speed to evaluate training outcomes, optimize gait, prevent injuries, and enhance athletic performance. Running speed provides a window into human physical capability and evolutionary adaptations.