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SESK: Stuff Everyone Should Know · sesk.info/drone-standard-sea-level-pressure

In the International Standard Atmosphere, what is standard sea level pressure?

29.92 inches of mercury, with a standard temperature of 15 degrees C.

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  1. 29.92 inches of mercury ✔
  2. 30.92 inches of mercury
  3. 28.92 inches of mercury

Why: Most aircraft performance data is based on the International Standard Atmosphere. At sea level it is 29.92 inches of mercury and 59 degrees F (15 degrees C).

Huh, didn't know that: In millibars, standard sea level pressure is 1,013.2 mb.

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Why did the barometer go to therapy? It was under too much pressure.
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References

Answer: 29.92 inches of mercury. Most aircraft performance data is based on the International Standard Atmosphere. At sea level it is 29.92 inches of mercury and 59 degrees F (15 degrees C).

  1. Remote Pilot sUAS Study Guide (FAA-G-8082-22), Chapter 3b www.faa.gov/sites/faa.gov/files/regulations_policies/handbooks_manuals/aviation/remote_pilot_study_guide.pdf
    Standard sea level pressure is defined as 29.92 "Hg and a standard temperature of 59 °F (15 °C).
    Checked 2026-10-09.

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