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.