Speed of Sound Calculator

An online Speed of Sound calculator for air

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Velocity of sound in air (or in other gases) can be expressed as

c = (k p / ρ)1/2

    = (k R T)1/2 (1)

where

c = sound velocity (m/s, ft/s)

k = ratio of specific heats (adiabatic index, isentropic expansion factor)

p = pressure (Pa, psi)

R = 287.053072 (J/kg K)  =  1,716 (ft lb/slug oR) = gas constant specific for air

T = absolute temperature (K, R)

The calculators below can be used to estimate velocity of sound in air at temperatures close to 273.15 K (0oC, 32oF).

Sound Velocity - SI Units

k - ratio of specific heats

R - gas constant (J/kg K)

T - absolute temperature (K)

Sound Velocity - Imperial Units

k - ratio of specific heats

R - gas constant (ft lb/slug oR)

T - absolute temperature (R)

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