MPH to Mach Number Converter

1.000 Mach
Subsonic
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Understanding Mach Numbers

Subsonic

Mach < 1.0

Transonic

Mach = 1.0

Supersonic

Mach > 1.0

Hypersonic

Mach > 5.0

Conversion Formula

To convert from miles per hour (mph) to Mach number, multiply the speed by 0.001303:

Mach = mph × 0.001303