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Air - Speed of Sound vs. Temperature

Speed of sound in air at standard atmospheric pressure with temperatures ranging -40 to 1000 °C (-40 to 1500 °F) - Imperial and SI Units.

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Speed of Sound in Air at Standard Atmospheric Pressure - Imperial (BG) Units:

Air - Speed of Sound vs. Temperature - Imperial Units
Temperature
- t -
(oF)
Speed of Sound
- c -
(ft/s)
-40 1004
-20 1028
0 1051
10 1062
20 1074
30 1085
40 1096
50 1106
60 1117
70 1128
80 1138
90 1149
100 1159
120 1180
140 1200
160 1220
180 1239
200 1258
300 1348
400 1431
500 1509
750 1685
1000 1839
1500 2114

Speed of Sound in Air at Standard Atmospheric Pressure - SI Units:

Air - Speed of Sound vs. Temperature - SI Units
Temperature
- t -
(oC)
Speed of Sound
- c -
(m/s)
-40 306.2
0 331.4
5 334.4
10 337.4
15 340.4
20 343.3
25 346.3
30 349.1
40 354.7
50 360.3
60 365.7
70 371.2
80 376.6
90 381.7
100 386.9
200 434.5
300 476.3
400 514.1
500 548.8
1000 694.8

Speed of sound in dry air

Speed of Sound in Air and Relative Humidity

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Air - Speed of Sound vs. Relative Humidity
 Temperature
(°C)

Speed of Sound (m/s)
Relative Humidity (%)
102030405060708090
0 331.5 331.5 331.5 331.6 331.6 331.6 331.7 331.7 331.7
5 334.5 334.6 334.6 334.7 334.7 334.7 334.8 334.8 334.9
10 337.5 337.6 337.7 337.7 337.8 337.9 337.9 338.0 338.0
15 340.5 340.6 340.7 340.8 340.9 341.0 341.1 341.2 341.2
20 343.5 343.6 343.7 343.9 344.0 344.1 344.2 344.4 344.5
25 346.4 346.6 346.8 347.0 347.1 347.3 347.5 347.6 347.8
30 349.4 349.6 349.9 350.1 350.3 350.5 350.8 351.0 351.2

Calculate the Speed of Sound in Air vs. Temperature

The velocity of sound can be calculated in metric units as

vms = 20.05 (273.16 + tC)1/2                       (1)

where

vms = velocity of sound (m/s)

tC = temperature (°C)

Velocity of sound in Imperial units:

vfts = 49.03 (459.7 + tF)1/2                       (2)

where

vfts = velocity of sound (ft/s)

tF = temperature (°F)

Note that speed is a scalar quantity. Velocity is vector quantity with direction.

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