SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/sport-standard-pressure

What is standard sea level pressure in inches of mercury?

29.92 inches of mercury.

Start playing free

  1. 29.92 ✔
  2. 30.29
  3. 28.92

Why: 29.92 inches of mercury is the standard reference pressure at sea level. Pressure altitude is measured from this standard datum.

Huh, didn't know that: The same standard pressure is also reported as 1,013.2 millibars.

The dad joke
What's the richest kind of air? A billionaire.
Like this card?
Play the game

References

Answer: 29.92. 29.92 inches of mercury is the standard reference pressure at sea level. Pressure altitude is measured from this standard datum.

  1. FAA Pilot's Handbook of Aeronautical Knowledge, Chapter 12 www.faa.gov/sites/faa.gov/files/14_phak_ch12.pdf
    is defined as 29.92 "Hg
    Checked 2026-10-11.
  2. FAA Pilot's Handbook of Aeronautical Knowledge, Chapter 4 www.faa.gov/sites/faa.gov/files/06_phak_ch4.pdf
    Pressure altitude is the height above a standard datum plane
    Checked 2026-10-11.

Think this answer is wrong? Tap "Challenge this answer" on the card in the game and tell us why.

Test yourself in the game

FlyingWhich certificates must you hold to fly a legal Part 103 ultralight?FlyingA powered ultralight under Part 103 must weigh less than how much empty?FlyingWhat is the maximum fuel capacity of a powered Part 103 ultralight?

That's stuff everyone should know.