International Standard Atmosphere
International Standard Atmosphere properties like pressure, temperature, density, viscosity, thermal conductivity and velocity of sound are indicated below.
ρo = 1.2250 kg/m3
| Elevation - z - (m) | Temperature - T - (K) | Pressure - p - (bar) | Relative Density - ρ/ρo - Density - ρ | Kinematic Viscosity - ν - x 10-5 (m2/s) | Thermal Conductivity - k - x 10-2 (W/m K) | Speed of Sound - c - (m/s) |
|---|---|---|---|---|---|---|
| -2000 | 301.2 | 1.2778 | 1.2067 | 1.253 | 2.636 | 347.9 |
| -1500 | 297.9 | 1.2070 | 1.1522 | 1.301 | 2.611 | 346.0 |
| -1000 | 294.7 | 1.1393 | 1.0996 | 1.352 | 2.585 | 344.1 |
| -500 | 291.4 | 1.0748 | 1.0489 | 1.405 | 2.560 | 342.2 |
| 0 | 288.15 | 1.01325 | 1.0000 | 1.461 | 2.534 | 340.3 |
| 500 | 284.9 | 0.9546 | 0.9529 | 1.520 | 2.509 | 338.4 |
| 1000 | 281.7 | 0.8988 | 0.9075 | 1.581 | 2.483 | 336.4 |
| 1500 | 278.4 | 0.8456 | 0.8638 | 1.646 | 2.457 | 334.5 |
| 2000 | 275.2 | 0.7950 | 0.8217 | 1.715 | 2.431 | 332.5 |
| 2500 | 271.9 | 0.7469 | 0.7812 | 1.787 | 2.405 | 330.6 |
| 3000 | 268.7 | 0.7012 | 0.7423 | 1.863 | 2.379 | 328.6 |
| 3500 | 265.4 | 0.6578 | 0.7048 | 1.943 | 2.353 | 326.6 |
| 4000 | 262.2 | 0.6166 | 0.6689 | 2.028 | 2.327 | 324.6 |
| 4500 | 258.9 | 0.5775 | 0.6343 | 2.117 | 2.301 | 322.6 |
| 5000 | 255.7 | 0.5405 | 0.6012 | 2.211 | 2.275 | 320.5 |
| 5500 | 252.4 | 0.5054 | 0.5694 | 2.311 | 2.248 | 318.5 |
| 6000 | 249.2 | 0.4722 | 0.5389 | 2.416 | 2.222 | 316.5 |
| 6500 | 245.9 | 0.4408 | 0.5096 | 2.528 | 2.195 | 314.4 |
| 7000 | 242.7 | 0.4111 | 0.4817 | 2.646 | 2.169 | 312.3 |
| 7500 | 239.5 | 0.3830 | 0.4549 | 2.771 | 2.142 | 310.2 |
| 8000 | 236.2 | 0.3565 | 0.4292 | 2.904 | 2.115 | 308.1 |
| 8500 | 233.0 | 0.3315 | 0.4047 | 3.046 | 2.088 | 306.0 |
| 9000 | 229.7 | 0.3080 | 0.3813 | 3.196 | 2.061 | 303.8 |
| 9500 | 226.5 | 0.2858 | 0.3589 | 3.355 | 2.034 | 301.7 |
| 10000 | 223.3 | 0.2650 | 0.3376 | 3.525 | 2.007 | 299.8 |
| 10500 | 220.0 | 0.2454 | 0.3172 | 3.706 | 1.980 | 297.4 |
| 11000 | 216.8 | 0.2270 | 0.2978 | 3.899 | 1.953 | 295.2 |
| 11500 | 216.7 | 0.2098 | 0.2755 | 4.213 | 1.952 | 295.1 |
| 12000 | 216.7 | 0.1940 | 0.2546 | 4.557 | 1.952 | 295.1 |
| 12500 | 216.7 | 0.1793 | 0.2354 | 4.930 | 1.952 | 295.1 |
| 13000 | 216.7 | 0.1658 | 0.2176 | 5.333 | 1.952 | 295.1 |
| 13500 | 216.7 | 0.1533 | 0.2012 | 5.768 | 1.952 | 295.1 |
| 14000 | 216.7 | 0.1417 | 0.1860 | 6.239 | 1.952 | 295.1 |
| 14500 | 216.7 | 0.1310 | 0.1720 | 6.749 | 1.952 | 295.1 |
| 15000 | 216.7 | 0.1211 | 0.1590 | 7.300 | 1.952 | 295.1 |
| 15500 | 216.7 | 0.1120 | 0.1470 | 7.895 | 1.952 | 295.1 |
| 16000 | 216.7 | 0.1035 | 0.1359 | 8.540 | 1.952 | 295.1 |
| 16500 | 216.7 | 0.09572 | 0.1256 | 9.237 | 1.952 | 295.1 |
| 17000 | 216.7 | 0.08850 | 0.1162 | 9.990 | 1.952 | 295.1 |
| 17500 | 216.7 | 0.08182 | 0.1074 | 10.805 | 1.952 | 295.1 |
| 18000 | 216.7 | 0.07565 | 0.09930 | 11.686 | 1.952 | 295.1 |
| 18500 | 216.7 | 0.06995 | 0.09182 | 12.639 | 1.952 | 295.1 |
| 19000 | 216.7 | 0.06467 | 0.08489 | 13.670 | 1.952 | 295.1 |
| 19500 | 216.7 | 0.05980 | 0.07850 | 14.784 | 1.952 | 295.1 |
| 20000 | 216.7 | 0.05529 | 0.07258 | 15.989 | 1.952 | 295.1 |
| 22000 | 218.6 | 0.04047 | 0.05266 | 22.201 | 1.968 | 296.4 |
| 24000 | 220.6 | 0.02972 | 0.03832 | 30.743 | 1.985 | 297.7 |
| 26000 | 222.5 | 0.02188 | 0.02797 | 42.439 | 2.001 | 299.1 |
| 28000 | 224.5 | 0.01616 | 0.02047 | 58.405 | 2.018 | 300.4 |
| 30000 | 226.5 | 0.01197 | 0.01503 | 80.134 | 2.034 | 301.7 |
- 1 m (meter) = 3.2808 ft
- 1 bar = 105 Pa (N/m2) = 0.1 N/mm2 = 10,197 kp/m2 = 10.20 m H2O = 0.9869 atm = 14.50 psi (lbf/in2) = 106 dyn/cm2 = 750 mmHg
- 1 W/(m K) = 0.85984 kcal/(h m oC) = 0.5779 Btu/(ft h oF)
- 1 m/s = 3.6 km/h = 196.85 ft/min = 2.237 mph
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