Water Garden Pond Calculations

The size of your Fish Pond(in gallons)can easily be determined with the use of formulas.
It is very important to know the amount of water you have in your Fish Pond to properly treat your Pond Fish or size up your pond for Pumps, Pond Filters, or even to just treat the water.
Knowing how many gallons you have in your Fish Pond can help prevent from overdosing and also from wasting products.

Rectangular or Square Shaped Fish Pond:
Average Length X Average Width X Average Depth X 7.5 = # of Gallons

Ex. Pond that is 4ft long, 5ft wide, & 3ft deep.
4 X 5 X 3 X 7.5 = 450 gallons


Round, Circular Shaped Fish Pond:
Diameter x Diameter x Average Depth x 5.875 = Gallons

Ex. Circular Pond that is 10ft in diameter & 3ft deep.
10 X 10 X 3 X 5.875 = 1762 gallons

Irregular shaped Water Garden Ponds are a bit trickier to calculate.
Usually it is still recommended that you take the
Average Width X Average Length X Average Depth X 7.5 to find the water volume of your Fish Pond.
This will give you a good idea of how much water your Water Garden may hold.

Take notice to consider shelves that have been made along edges of Fish Ponds and sloping Fish Pond floors.

No one has a perfectly shaped Fish Pond. So, please remember that these calculations are approximations of how many gallons of water you Fish Pond holds.