We’ve found these formulas and conversion factors to be helpful! Have Fun!!
For a square or rectangular pond volume in gallons:
(Length) x (Width) x (Depth) = cubic volume, if measured in inches divide by 231
if measure in feet multiply by 7.5
For a round pool in gallons:
(Radius) x (Radius) x 3.14 x depth in feet = cubic volume, convert as above.
Note: for most ponds, calculate the volume as if the pond had straight sides and a flat even floor. To compensate, we then multiply the volume by .75 to .85
Feet Head (of water) x 0.433 = PSI (pounds per square inch)
PSI (pounds per square inch) x 2.31 = Feet Head (of water)