Convert Mach (SI Standard) (Ma) to Centimeter/Hour (cm/h) instantly.
About these units
Mach (SI Standard) (Ma)
Mach is a dimensionless measure of speed relative to the speed of sound in a given medium. Mach 1 corresponds to the speed of sound, Mach 2 is twice that speed, and so on. Mach values change with temperature, atmospheric pressure, and altitude because the speed of sound changes with these conditions. Aircraft performance, supersonic flight, rocket design, and shockwave analysis all depend heavily on Mach numbers. Mach is more than just a speed measure—it categorizes aerodynamic regimes: Subsonic (Mach < 1), Transonic (Mach 0.8–1.2), Supersonic (Mach 1–5), Hypersonic (Mach > 5). Mach numbers therefore provide insight into aerodynamic behavior, not just velocity.
Centimeter/Hour (cm/h)
A centimeter per hour is used in fields where extremely slow processes are tracked, including seepage rates in soil hydrology, chemical diffusion fronts in laboratory experiments, and biological growth in certain organisms. Urban planning and material science may use cm/h to describe settlement rates in soft soils or long-term deformation of structural components. Although rarely used in public communication, cm/h is invaluable in precision scientific contexts where even a centimeter over an hour represents meaningful change.