Free Mach Number Calculator
Calculate the Mach number of an object as the ratio of its speed to the local speed of sound: M = v / v_sound.
m/s
°C
Mach Number
1.980
Speed of Sound343.4 m/s
Mach Number vs Object Speed
Mach Number
The Mach number is a dimensionless ratio comparing an object's speed to the speed of sound in the surrounding medium.
Formula
M = v / v_sound
Example Calculation
An aircraft flying at 680 m/s in air at 20 degrees C.
- 01v_sound = 331.3 + 0.606 * 20 = 343.4 m/s
- 02M = 680 / 343.4
- 03M = 1.980
- 04The aircraft is supersonic (M > 1)
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