Pressure conversion

Approximate
psea = p + h/9.2
psea = sea level pressure [hPa]
p = station pressure [hPa]
h = station elevation [m]

Accurate

psea = p ∗ exp (- g ∗ M ∗ h/R ∗ t )
psea = sea level pressure [hPa]
p = station pressure [hPa]
h = elevation [m]
t = station temperature [K]
g = Earth-surface gravitational acceleration = 9.80665 m/s2
M = molar mass of dry air = 0.0289644 kg/mol
R = universal gas constant = 8.31447 J∗K-1∗mol-1

Approximate
p = psea - h/9.2
psea = sea level pressure [hPa]
p = station pressure [hPa]
h = station elevation [m]

Accurate

p = psea / exp (- g ∗ M ∗ h/R ∗ t )
psea = sea level pressure [hPa]
p = station pressure [hPa]
h = elevation [m]
t = station temperature [K]
g = Earth-surface gravitational acceleration = 9.80665 m/s2
M = molar mass of dry air = 0.0289644 kg/mol
R = universal gas constant = 8.31447 J∗K-1∗mol-1

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