Air Temperature and Altitude

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):

• 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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