Speed of Sound Calculator

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The 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 the velocity of sound in air at temperatures close to 273.15 K (0^oC, 32^oF).

Sound Velocity - SI Units

Sound Velocity - Imperial Units

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