How to Calculate Pressure Potential


Pressure potential is a component in water potential, which is is the potential energy of a unit of water volume in given conditions relative to the same volume of pure water. Pressure potential is a measurement of the tendency of water to move from one area to another as a result of mechanical pressure. If you know the depth below the free water table that you are measuring, calculating the pressure potential can be done with a calculator.

Things You'll Need

  • Meter stick
  • Calculator
  • Measure the depth in meters below the top of the free water table for the point at which you are attempting to calculate the pressure potential with your meter stick.

  • Divide the depth in meters measured in Step 1 by 10 and add one to the result to calculate the amount of atmospheres of pressure present at the depth.

  • Multiply your result from Step 2 by the difference in depth measured in Step 1 to get the pressure potential per unit volume of the water at the depth you are measuring.


  • Photo Credit Stockbyte/Stockbyte/Getty Images
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