Speed of Sound vs. Elevation, Temperature and Air Pressure
Altitude and speed of sound, temperature and pressure.
Speed of sound in air at various altitudes:
| Elevation | US Std Atmosphere 1) | Speed of Sound | |||||
|---|---|---|---|---|---|---|---|
| Temperature | Pressure | ||||||
| (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
