Atmospheric Druck at Altitude Rechner — Formel

Barometric Pressure at Altitude

For an isothermal atmosphere the pressure decreases exponentially with height.

Formula

P(h) = P0 * exp(-h / H)

  • *P0* = surface pressure
  • *h* = altitude above the surface
  • *H* = scale height (about 8.5 km for Earth)

    • Every scale height of ascent reduces the pressure by a factor of e (about 2.718).

    Lösungsbeispiel

    Earth at 5 000 m altitude (P0 = 101 325 Pa, H = 8 500 m).

    1. P = P0 * exp(-h/H)
    2. P = 101325 * exp(-5000/8500)
    3. exp(-0.5882) = 0.5556
    4. P = 101325 * 0.5556 = 56 300 Pa = 0.556 atm