Science
Sound intensity level
Convert an acoustic intensity and reference intensity into a decibel level.
Calculators / Science / Mach number
Mach number calculator
Compare object speed to the local speed of sound.
On this page
Mach number0.73
Calculator controls
How to calculate
Compare object speed to the local speed of sound.
Mach number = v/c
Worked example
Object speed (m/s): 250; Local sound speed (m/s): 343.
Mach number: 0.73 .
Assumptions and limits
Enter the sound speed for the actual medium and conditions. The default represents a sample air condition, not every altitude or temperature.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
Compare object speed to the local speed of sound.
When this tool is useful
Mach number = v/c
Understanding your inputs
| Input | What to enter |
|---|---|
| Object speed (m/s) | Enter a number of at least 0 and no more than 1000000000000. |
| Local sound speed (m/s) | Enter a number of at least 1e-12 and no more than 1000000000000. |
Frequently asked questions
What assumptions does this calculation use?
Enter the sound speed for the actual medium and conditions. The default represents a sample air condition, not every altitude or temperature.
How is the result calculated?
Mach number = v/c