# Velocity of sound in air Calculator

## Calculates the speed of sound in air.

 Temperature T ℃ Heat capacity ratio k air:1.403, He:1.66 Molecular mass M g/mol  air:28.966, He:4 Velocity of sound c m/s = km/h = kn
 At 15 degrees C, the velocity of sound is about 340 m/s in air and 997 m/s in helium gas.$\normal\hspace{40}c=\sqrt{\large\frac{kRT}{M}}\\[10]\ heat\ capacity\ ratio\ (air)\hspace{5}k=1.403\\\ molecular mass\ (air)\hspace{10}M=0.028966kg/mol\\\ gas\ constant\hspace{67}R=8.314472\\\ absolute\ temperature\hspace{5}T=273.15+t^{\circ}C\\$

Thank you for your questionnaire.
Sending completion

To improve this 'Velocity of sound in air Calculator', please fill in questionnaire.
Male or Female ?
Male Female
Age
Under 20 years old 20 years old level 30 years old level
40 years old level 50 years old level 60 years old level or over
Occupation
Elementary school/ Junior high-school student
High-school/ University/ Grad student A homemaker An office worker / A public employee
Self-employed people An engineer A teacher / A researcher
A retired people Others
Useful?
Very Useful A little Not at All
Purpose of use?