Speed of Sound Calculator

Your details

Forward mode finds the speed of sound from temperature. Reverse mode finds the air temperature that yields a target speed.
Select the medium through which the sound travels.
Temperature of the medium. Air: valid from about -50 to 100 °C. Water: 0 to 100 °C. Seawater: 0 to 35 °C.
°C
Speed of soundNear standard air speed
343.21m/s

Speed of sound in the selected medium and temperature

Speed (selected unit)343.21
Mach 1 at this condition343.21m/s
343.21 m/s
Very cold air<320Typical air320-360Hot gas / vapour360-700Liquid medium700+

Speed of sound: 343.21 m/s

  • At 20 °C in dry air, sound travels at 343.21 m/s.
  • This is Mach 1.000 relative to standard conditions (20 °C, sea level).
  • Temperature is the dominant factor: speed increases by about 0.6 m/s for each 1 °C rise in dry air.

Next stepCombine this result with the Mach Number Calculator to find the speed of any object as a fraction of the local speed of sound.

 = Powered by OnlyCalculators