AWH · Chapter 4
AWH 4-6
Page 4-6
This reproduces published FAA reference text for study. It does not replace the current official FAA publication or regulation.
Chapter 4, The Earth’s Atmosphere 4-6 Table 4-2. Selected Properties of the Standard Atmosphere Property Metric Units English Units Sea level pressure 1013.25 hectopascals (hPa) 29.92 inches of mercury (inHg) Sea level temperature 15 °C 59 °F Lapse rate of temperature in the troposphere 6.5 °C/1,000 m 3.57 °F/1,000 ft Pressure altitude of the tropopause 11,000 m 36,089 ft Temperature at the tropopause -56.5 °C -69.7 °F Note: 1 hectopascal = 1 millibar. Figure 4-2. U.S. Standard Atmosphere Within the Troposphere
Retrieved from ecfr.gov on July 18, 2026.