Garden & Water Utilities
Pond Volume, Liner & Pump Calculator
Estimate water volume, a simple liner size and the flow required for your chosen turnover time from a rectangular, oval or circular pond footprint.
Planning estimate only
Liner dimensions include the entered maximum depth on both sides plus an edge-overlap allowance. Pump flow is the ideal volume-per-turnover calculation; actual pump selection must account for head, pipe friction, filter, waterfall and manufacturer curves. Stocking, wildlife and chemical advice are intentionally outside this tool.
Sources: Penn State Extension, Water for Wildlife: Bird Baths and Backyard Ponds and U.S. Department of Energy Building America Solution Center, Variable-Speed Pool Pumps (accessed 2026-09-29).