Pond Water Volume Calculator

Author: Last updated:

Knowing your ponds volume is vital when using treatments or working out pump and filter sizes. Use the tools below to work out your ponds volume. If you have measurements in Inches or Feet use the converter below.

The tools below will help you to work out the volume of your pond if it is made up from the four basic shapes below (rectangular, cylindrical, triangular, or octagonal).

For irregular shape ponds use our Irregular pond volume guide >>


Convert Feet to Centimetres

IN x 2.54 = CM | FT x 30.48 = CM

Convert Inches to Centimetres

IN x 2.54 = CM | FT x 30.48 = CM

Pond Volume
Rectangular / Square ponds

diagram of rectangle tank
Width (cm)
Length (cm)
Height (cm)

Your pond volume is:
Litres
Imperial Gallons
US Gallons

Pond Volume
Cylindrical ponds

diagram of cylindrical tank

Diameter (cm)
Height (cm)

Your pond volume is:
Litres
Imperial Gallons
US Gallons

Pond Volume
Triangular ponds

diagram of corner tank
Distance A (cm)
Distance B (cm)
Height (cm)

Your pond volume is:
Litres
Imperial Gallons
US Gallons

Pond Volume
Octagon ponds

diagram of octagon tank
Distance A (cm)
Distance B (cm)
Height (cm)

Your pond volume is:
Litres
Imperial Gallons
US Gallons

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