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Altitude Converter

Convert between feet, meters, flight levels, and pressure altitude for aviation and hiking.

Type in any field — the others update instantly.

Altitude is measured in different units depending on the context.

Basic conversions:

  • 1 foot = 0.3048 meters (exact)
  • 1 meter = 3.28084 feet
  • 1 kilometer = 3,280.84 feet

Flight Levels (FL): Flight levels are used in aviation above the transition altitude.

  • Flight Level = altitude in feet / 100
  • FL350 = 35,000 feet = 10,668 meters
  • FL100 = 10,000 feet = 3,048 meters

Approximate pressure at altitude (standard atmosphere):

Altitude Feet Pressure (hPa) Pressure (inHg)
Sea level 0 ft 1013.25 hPa 29.92 inHg
1,000 m 3,281 ft 898.8 hPa 26.54 inHg
2,000 m 6,562 ft 795.0 hPa 23.47 inHg
3,000 m 9,843 ft 701.1 hPa 20.70 inHg
5,000 m 16,404 ft 540.5 hPa 15.96 inHg
10,000 m 32,808 ft 264.4 hPa 7.81 inHg

Pressure altitude formula (ISA standard):

  • Pressure (hPa) ≈ 1013.25 × (1 − altitude_m × 0.0000226)**5.256

Aviation worldwide uses feet for altitude, except in China and some CIS countries which use meters.


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