Things You'll Need
Instructions
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.