How to Convert PSI to Water Gauge

Written by andy pasquesi
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How to Convert PSI to Water Gauge
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In the early 17th century, scientist Evangelista Torricelli first measured the pressure of the earth's atmosphere by testing how high it could push water up a vacuum-sealed column (i.e., a barometer). While Torricelli later replaced the water in his barometers with mercury, the term "water gauge" continued to be used. Because water gauge pressure can be expressed in millimetres (mmWG), centimetres (cmWG), meters (mWG), inches (inWG) or feet (ftWG), it is essential that you pay close attention to the units begin used. If you wish to convert a measure of pressure from psi (pounds per square inch) to a water-gauge-based unit, it requires basic arithmetic.

Skill level:
Easy

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Instructions

  1. 1

    Multiply the pressure (in psi) by 6894.78 to convert its units to Pascals.

  2. 2

    Divide the value from Step 1 by 9.80665 to convert its units to mmWG.

  3. 3

    Divide the value from Step 1 by 98.0665 to convert its units to cmWG

  4. 4

    Divide the value from Step 1 by 9806.65 to convert its units to mWG

  5. 5

    Divide the value from Step 1 by 249.089 to convert its units to inWG.

  6. 6

    Divide the value from Step 1 by 2,989.07 to convert its units to ftWG.

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