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US Standard Atmosphere (1976)

z (geomet. alt.)
h (geopot. alt.)
P (pressure)
ρ (density)
T (temp.)
CS (sp. sound)
HP (scale ht.)
V (mean sp. part.)
L (mean fr. path)
ν (col. freq.)
μ (dyn. visc.)
η (kin. visc.)
k (therm. con.)


This is a calculator for the values of the US-Standard Atmosphere (1976), that may be displayed in different units. (U.S. Standard Atmosphere, 1976, U.S. Government Printing Office, Washington, D.C., 1976)

Usage: In the three columns, the table shows the values of the standard atmosphere at three altitudes. Type a value for the geometric altitude, the geopotential altitude, the pressure or the density into an input field (light green). After a mouse click on any free space of the window or on the "calculate" button, the calculation is performed. The input value must be within the range of valid values. The Standard Atmosphere is defined between 0 km and 84.852 km geopotential altitude.
The quantities with pink fields are just output values. These may not be typed for input. Move the mouse over the term of a quantity or click on it to read its full name.
In the last column of the table you may choose the unit for the input and output values in the whole row. After a change, values calculated before are displayed in the new unit.

Example: What is the pressure at a geometric altitude of 4811 m under the conditions of the standard atmosphere. Type the value "4811" into a field in the first row (geometric altitude). As unit you should have chosen "m" before. After a mouse click on any free space of the window or on the "calculate" button, you may read the result (545 hPa).

- Large and small numbers are written exponentially. As example 2.3e5 = 2.3⋅105 = 230000 or 4.5e-5 = 4.5⋅10-5 = 0.000045.
- There is no warranty for the conversion. Cactus2000 is not responsible for damage of any kind caused by wrong results.
- Please send an email if you have suggestions or if you would like to see more conversions to be included.

© Bernd Krüger, 21.03.2008

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