Kilometer per Hour to Mach Calculator
Convert Speed from KM/H to Mach Number
0.81
Mach
Subsonic
Understanding Mach Numbers
Speed Classifications
| Category | Mach Range | Description |
|---|---|---|
| Subsonic | < Mach 1.0 | Below speed of sound |
| Transonic | Mach 1.0 | At speed of sound |
| Supersonic | > Mach 1.0 | Above speed of sound |
| Hypersonic | > Mach 5.0 | Five times speed of sound |