# Mach Number

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M =
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Rating
ID
Carol.Mach Number
UUID
19b3675f-f2fd-11e3-b7aa-bc764e2038f2

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
• (Vs) This is the localized Speed of Sound

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

#### 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
• Vs is the localized Speed of Sound

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