Fish Pond Volume Calculator

Work out fish pond volume instantly with clear inputs, formula shown and shareable results.

About Fish Pond Volume Calculator

For a pond with a sloping bed, volume is surface area times the mean of the shallow and deep depths. Surface area matters separately because oxygen transfer from the atmosphere, natural food production and evaporation all scale with area rather than volume.

Formula

Pond volume

Average depth = (shallow + deep) / 2; volume = length x width x average depth

Worked example

With the default values below, Fish Pond Volume Calculator returns Pond Volume of 900.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Pond Lengthminimum 0.1 m: 30 m
Pond Widthminimum 0.1 m: 20 m
Depth At Shallow Endminimum 0.05 m: 1 m
Depth At Deep Endminimum 0.05 m: 2 m

Results

Pond Volume: 900.00
Water Surface Area: 600.00
Average Depth: 1.500
Volume In Litres: 900,000

Step by step

1Values used
2Pond volume
3Pond Volume= 900.00
4Water Surface Area= 600.00
5Average Depth= 1.500
6Volume In Litres= 900,000

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Why is average depth used rather than maximum?

Stocking, liming and chemical treatments are dosed on the actual water volume. Using maximum depth over-estimates volume and leads to over-dosing.

What depth should a grow-out pond be?

1.0-1.5 m for carp polyculture, up to 2 m where thermal buffering is needed. Deeper than about 2.5 m the bottom layer stratifies and goes anoxic.