Pond Liner Size & Volume Calculator
By Santaji GadepatilinUpdated October 27, 2026
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Type in any field to change it. Press × on a value to calculate that field instead.
How to use this calculator
Enter the pond’s length, width, maximum depth and the overlap you want around the edge. The liner size and approximate volume are calculated.
Example
A 3 × 2 m pond, 0.6 m deep, 0.3 m overlap:
- Liner = 4.8 × 3.8 m
- Volume ≈ 2,160 litres
Frequently asked questions
How do I calculate pond liner size?
Liner length = pond length + 2 × depth + 2 × overlap; liner width = pond width + 2 × depth + 2 × overlap.
Why multiply volume by 0.6?
Ponds have sloping sides and shelves, so they hold less than a rectangular box. 0.5–0.7 is a typical factor.
How deep should a wildlife pond be?
Include shallow edges for wildlife and a deeper zone of about 60 cm so part of the pond stays ice-free in winter.