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Pond Volume and Liner Budget

Estimate pond water volume, water cost and a liner sheet for simple constant-depth shapes.

  • Formula & worked example
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Calculator inputs

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

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Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.

Formula and method

A 3 m by 2 m pond at 1 m constant depth holds 6000 liters. With 0.5 m edge overlap, its liner sheet is 6 m by 5 m. At 2 per m² and 10 per 1000 liters, liner and water costs are each 60.

Volume = plan area×depth; rectangular liner dimensions = each pond dimension+2(depth+edge overlap).

Worked example

Enter these known values and leave the other values blank.

Length (L)
3 m
Width (W)
2 m
Depth (d)
1 m
Overlap width (O)
0.5 m
Liner price per unit area
2 USD / m²
Water price per unit volume
10 USD / m³
Pond size
6 m²
Pond volume
6000 L
Liner width (Wₗ)
5 m
Liner length (Lₗ)
6 m
Liner area
30 m²
Liner cost
60 USD
Pond water cost
60 USD

Assumptions and limitations

  • Shapes have vertical walls and constant depth; oval dimensions are full axes. Liner dimensions estimate a flat sheet including edge overlap, not seam layout or curved wall slack. The preserved minimum overlap is 0.3048 m, a planning convention; actual edging requirements depend on installation.
  • Use compatible measurement units. Clear an unknown before solving for it, and lock independent known values when comparing changes. Currency choices label amounts without exchange-rate conversion.

Common questions

Can I solve backward from the result?

Clear the unknown and enter independent known values. A rounded whole count cannot uniquely recover a continuous dimension; keep the original measured dimensions for procurement planning.

References

Enforce the stated physical geometry and whole-count domains. Bookify replaces the captured rounded US gallon with the exact 3.785411784-liter definition. Prices per thousand US gallons use the same exact gallon as the volume inputs.

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