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What are the heights corresponding to the pressure levels in the atmosphere?

These equivalents are based on the International Standard Atmosphere and promulgated by ICAO:


mbar (hPa) Nominal Altitude
(ft to nearest 1000 ft; metres to nearest 100 m)
100 53,000 ft / 16,200 m
200 39,000 ft / 11,800 m
250 34,000 ft / 10,400 m
300 30,000 ft /   9,200 m
400 24,000 ft /   7,200 m
500 18,000 ft /   5,600 m
600 14,000 ft /   4,200 m
700 10,000 ft /   3,000 m
850   5,000 ft /   1,500 m

 

For full details, see this article. The article also has the definitions of QFE, QNH, QFF and QNE.