Pond Size Calculator
Calculate the volume, surface area, and liner size for a rectangular or circular pond.
Published by:
isCalculator Editorial Team
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How to use this tool?
This calculator helps you estimate the volume, surface area, and liner size for a rectangular or circular pond. All measurements must be entered in feet.
- Select pond shape – Choose Rectangular or Circular from the dropdown.
- Enter dimensions:
- For rectangular: Length, Width, and Depth (all in feet).
- For circular: Diameter and Depth (in feet).
- Set liner overlap – Default is 2 feet; adjust as needed (this adds extra material around the pond edge).
- Click “Calculate” – Results appear below showing:
- Volume in cubic feet (ft³).
- Surface area in square feet (ft²).
- Liner size – either a rectangle (length × width) or a circle diameter, including depth and overlap.
- Review the formula – An info box shows the exact calculation steps for transparency.
Tip: Ensure all inputs are positive numbers. If errors appear, correct the highlighted fields and recalculate.
Previous Results
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Frequently Asked Questions
For rectangular ponds, measure length, width, and average depth. For circular ponds, measure the diameter and average depth.
Liner overlap is extra material extending beyond the pond edges to secure the liner, typically 1-2 feet.
This calculator is designed for rectangular and circular shapes. For irregular shapes, approximate using average dimensions or break into sections.