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.
Speed of Sound in Air at Standard Atmospheric Pressure - Imperial (BG) 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:
| 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 Air and Relative Humidity
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| Temperature (°C) | Speed of Sound (m/s) | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Relative Humidity (%) | |||||||||
| 10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 | |
| 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.
