Enter the local flow velocity and the speed of sound in the medium into the calculator to determine the Mach number.

## Mach Number Formula

The following formula is used to calculate a Mach number.

M = u / c

• Where M is the Mach number
• u is the local velocity
• c is the speed of sound in the medium

## Mach Number Definition

A Mach number is defined as the ratio of a local velocity to the speed of sound.

## Mach Number Example

How to calculate a Mach number?

1. First, determine the speed of the object.

Measure the speed of the object in the medium. The units for speed can be anything as long as the same units are used for the speed of sound.

2. Next, determine the speed of sound.