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Air Temperature and Altitude

Altitude - air temperature and air density

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Standard values for pressure, temperature and density (ignoring the slight effect of humidity) at altitudes from sea level to 16,000 feet (about 4900 m):

Altitude
(feet)
Pressure
(in. Hg)
Temp.
(F)
Density
(%)
sea level 29.92 59.0 100
2000 27.82 51.9 94.3
4000 25.84 44.7 88.8
6000 23.98 37.6 83.6
8000 22.22 30.5 78.6
10000 20.57 23.3 73.8
12000 19.02 16.2 69.3
14000 17.57 9.1 65.0
16000 16.21 1.9 60.9
  • 1 ft (foot) = 0.3048 m
  • 1 in mercury (Hg) = 3,376.8 N/m2 (Pa)= 0.49 lb/in2 (psi) = 12.8 in water
  • T(oC) = 5/9[T(oF) - 32]
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