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Elevation and Speed of Sound

Speed of sound, temperature and pressure at different altitudes

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Speed of sound in air at various altitudes:

ElevationUS Std Atmosphere 1)Speed of Sound
TemperaturePressure
(metre)(feet)(oC)(oF)(kPa)(psi)(m/s)(ft/s)
-1000 -3281 21.5 70.7 113.90 16.52 344.1 1129
-500 -1640 18.3 64.9 107.49 15.59 342.2 1122
0 0 15.0 59.0 101.35 14.70 340.3 1116
250 820 13.4 56.1 98.32 14.26 339.3 1113
500 1640 11.8 53.2 95.49 13.85 338.4 1110
750 2461 10.1 50.2 92.67 13.44 337.4 1107
1000 3281 8.5 47.3 89.84 13.03 336.4 1103
1250 4101 6.9 44.4 87.15 12.64 335.5 1100
1500 4921 5.3 41.5 84.53 12.26 334.5 1097
1750 5741 3.6 38.5 81.98 11.89 333.5 1094
2000 6562 2.0 35.6 79.50 11.53 332.5 1091
2500 8202 -1.2 29.8 74.67 10.83 330.6 1084
3000 9843 -4.5 23.9 70.12 10.17 328.6 1078
3500 11483 -7.7 18.1 65.78 9.54 326.6 1071
4000 13123 -11.0 12.2 61.64 8.94 324.6 1065
4500 14764 -14.2 6.4 57.78 8.38 322.6 1058
5000 16404 -17.5 0.5 54.05 7.84 320.5 1051
5500 18045 -20.7 -5.3 50.54 7.33 318.5 1045
6000 19685 -23.9 -11.1 47.23 6.85 316.5 1038
6500 21325 -27.2 -17.0 44.06 6.39 314.4 1031
7000 22966 -30.4 -22.8 41.09 5.96 312.3 1024
7500 24606 -33.7 -28.6 38.33 5.56 310.2 1017
8000 26247 -36.9 -34.5 35.65 5.17 308.1 1011
8500 27887 -40.2 -40.3 33.16 4.81 305.9 1003
9000 29528 -43.4 -46.2 30.82 4.47 303.8 996
9500 31168 -46.7 -52.0 28.61 4.15 301.7 990
10000 32808 -49.9 -57.8 26.48 3.84 299.5 982
11000 36089 -56.4 -69.5 22.68 3.29 295.2 968
12000 39370 -56.4 -69.5 19.37 2.81 295.1 968
13000 42651 -56.4 -69.5 16.62 2.41 295.1 968
14000 45932 -56.4 -69.5 14.20 2.06 295.1 968
15000 49213 -56.4 -69.5 12.00 1.74 295.1 968
16000 52493 -56.4 -69.5 10.34 1.50 295.1 968
17000 55774 -56.4 -69.5 8.83 1.28 295.1 968
18000 59055 -56.4 -69.5 7.58 1.10 295.1 968
19000 62336 -56.4 -69.5 6.48 0.94 295.1 968
20000 65617 -56.4 -69.5 5.52 0.80 295.1 968
25000 82021 -51.6 -60.9 2.55 0.37 298.4 979
30000 98425 -46.7 -52.0 1.17 0.17 301.7 990
32000 104987 -44.7 -48.5 0.90 0.13 303.0 994

1) ICAO International Civil Aviation Organization - Standard Atmosphere
 

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