# Velocity of sound in air Calculator

## Calculates the speed of sound in air.

Temperature T
Heat capacity ratio k
1.       air:1.403, He:1.66
Molecular mass M
1. g/mol
2.  air:28.966, He:4

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

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