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Absolute and gauge pressure

Reference pressure:

absolute relative
Pa = N / m2
hPa = mbar
bar
dyn/cm2
Torr = mm Hg (0°C)
atm (1 atm = 760 Torr)
at = kgf/cm2
psi = lbf/in2
lbf/ft2
cm H2O (4°C)


Rounding: significant digits.
Decimal sign:

Pressure is either given as absolute pressure, with the vacuum as reference, or as gauge pressure (relative pressure) with another pressure (often 1 atm) as reference. This calculator converts values of absolute to gauge pressure and vice versa in several units.

Usage: Type the given value into the coresponding field. After the next mouse click on any free space of the window or the "calculate"-button the calculation is performed. Read the wanted result.
Use the "reset" button to reset your calculation. Move the mouse over a unit or click on it to read its full name.
As reference pressure 1 atm is prescribed. You can change this value to other values or to other units (from the pull-down menu). The new calculation is always performed after the next mouse click.

Example: A typical overpressure of a bicycle tyre is PG = 65 psi. What is the value of the pressure as absolute pressure in bar?
Type the given value (65 psi) into the corresponding field. After the next mouse click on any free space of the window or the "calculate"-button you can read the result (about 5.5 bar).

Remarks:
- Please note the remarks about the representation of numbers..
- There is no warranty for the calculation. 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.

- A collection of all Cactus2000-converters running offline may be ordered for a price of € 15.-. A test version is available for download for free.

© Bernd Krüger, 08.04.2012

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