Mach Number

The Mach Number calculator computes the mach speed of an object based on the velocity of the object and the local speed of sound.

INSTRUCTIONS: Choose units and enter the following:

• (V)  This is the velocity of the object
• (V_s) This is the localized Speed of Sound

Mach Number (M): The calculator returns the mach number rounded to the nearest 1,000^th

Related Calculators

• Mach Number from Velocity and Local Speed of Sound
• Mach Number from Velocity, Density and Bulk Modulus
• Formula for the Speed of Sound
• Speed of Sound in Dry Air
• Knudsen Number
• Distance Sound has Traveled 

The Math / Science

Mach number (M or Ma) is a dimensionless quantity representing the ratio of speed of an object moving through a fluid and the local speed of sound

The formula for Mach Number is:

     `M = V / V_s`

where:

• M is the Mach Number
• V is the velocity of the object
• V_s is the localized Speed of Sound

The Speed of Sound in dry air is 343.2 meters per second