Pond Liner Size Calculator
Estimate the liner size you may need from your pond’s length, width, maximum depth, and an edge overlap allowance. This is a planning estimate for a simple pond shape. Confirm final liner sizing before purchase.
Measure the longest straight-line length.
Measure the widest point, perpendicular to the length.
Measure to the deepest point.
Extra liner beyond the pond edge on each side.
Your planning estimate
Your calculated minimum liner dimensions are .
Don’t forget underlayment padding: it helps protect your liner from punctures and uneven ground. Shop PondScape Underlayment.
Important: Shelves, slopes, streams, waterfalls, and irregular pond shapes all add surface area beyond this basic estimate. Plan for additional material and confirm the final size before ordering.