Mach Number Calculator
Calculate Mach number from true airspeed and outside air temperature.
A QUICK WALKTHROUGH
How to use this tool
- Enter the values in the labeled units.
- Calculate and review the result.
- Change inputs to clear the previous result.
Method and limits
Dry ideal air approximation: γ = 1.4; R = 287.05 J/(kg·K); a = √(γR(OAT + 273.15)), M = TAS/a. TAS is true airspeed, never indicated airspeed (IAS). TAS must be non-negative; temperature must exceed −273.15 °C. Fixed γ and R are educational approximations.
Sources
https://www1.grc.nasa.gov/beginners-guide-to-aeronautics/mass-flow-rate-equations/
How is the result used?
For education only; never use this result for flight or navigation decisions. Inputs stay in this browser; nothing is sent.
GOOD TO KNOW
Common questions
How is the result used?
For education only; never use this result for flight or navigation decisions.