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# Speed of Sound Formula

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Equation / Last modified by Administrator on 2018/08/16 07:12
`c = `

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vCalc.Speed of Sound Formula

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The **Speed of Sound **calculator computes the speed of sound based on stiffness and density.

**INSTRUCTIONS**: Choose units and enter the following:

- (
**K**) This is the coefficient of stiffness (Bulk Modulus for gases)_{s} - (
**ρ**) This is the density of medium

**Speed of Sound (c):** The calculator returns the velocity in meters per second. However this can be automatically converted to compatible unit via the pull-down menu.

#### Related Calculators

- Mach Number from Velocity and Local Speed of Sound
- Mach Number from Velocity, Density and Bulk Modulus
- Speed of Sound in Dry Air
- Knudsen Number
- Distance Sound has Traveled

#### The Math / Science

The formula for the speed of sound is:

`c = sqrt( K_s / ρ)`

where:

- c is the speed of soundof sound in the medium
- K
_{s}is the coefficient of stiffness - ρ is the density of material

The Speed of Sound in dry air is 343.2 meters per second.