Pond Volume Calculator
How to calculate the volume of your pond in gallons

The basic formula for calculating the volume in gallons of a pond or pool is to use the formula L x W X D x 7.5 where L is the Length in Feet, W is the Width and Feet and D is the Depth in feet. Most ponds are not perfect squares or circles so when you use the pond volume calculator you should make allowances for variations in depth and shape. Try to use averages when you enter the data and when your pond is irregular shaped with depth variations give up to 20% variation to what this calculator shows.

Enter Pond Dimensions
Click "Calculate your Pond Volume" to calculate pond volume.
Pond Length
feet
Pond Width
feet
Average Pond Depth Depth
feet

Pond Volume Is Approximately: Gallons
This volume is based on a fairly recatangular or sqaure pond.
In an oval or irregular shaped pond the volume will be approximately 10% less than what the calculator shows.
In a round or circular pond the volume will be approximately 20% less that the pond volume shown.

To find the recommended pond pump for your pond or waterfall use the
Pond Pump Calculator

Knowing the volume of your pond, gallons or liters, is important. If you have fish or koi or goldfish or trout or bass then you must respect the recommended number of fish in the volume of your pond.

Another reason why it is important to know the formula to calculate pond volume in gallons is to ensure that when adding beneficial bacteria or algaecide you add the recommended dosage of the product so you don't inadvertantly cause any damage to your fish or plants.

When adding pond dye you also should understand how much water your one acre pond holds or how much a small water garden holds so you add the correct amount of pond dye. Another reason why you should know hom many gallons are in your pond is when choosing the proper pond pump so you can ensure your turnover rate is reached.

If you have a one million gallon pond and you need to do a full circulated turnover every 48 hours then you will need a pond pump that circulates over 20 thousand gallons per hour.

If you are using a bottom-mount diffuser system instead of a pond pump this information will enable you to choose the viability of the best aeration or puming filtration system for your pond or lake.

A single micro-bubble diffuser can move 30,000 gallons in an hour in a ten foot deep pond; have you tried to find a submersible pond pump or even an external pump that can pump 500 gallons per minute? Not easy.

In most pond projects with a small EPDM liner the volume is important to understand for the number of koi or goldfish that you can support in a pond.

Knowing the amount of water in a dugout or water garden is important thwne sizing the aeration system, tubing lengths, and pump head heights of any installation.

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