Learn your pond's volume in litres using the calculator below
Pond Liner Size Calculator
See how much liner you need for your pond
Calculations for Liner Size
To calculate the length and width of liner for a pond, follow the diagram below.
It shows how to take overhang and the vertical runs into consideration.
A standard overhang of 0.4m is added to each side.
Length cross-section
Width cross-section
Liner Length =
Overhang 1 + Depth + Pond Length + Depth + Overhang 2
= 0.4 + D + L + D + 0.4
= Pond Length + (2 x Depth) + 0.8
Liner Width =
Overhang 3 + Depth + Pond Width + Depth + Overhang 4
= 0.4 + D + W + D + 0.4
= Pond Width + (2 x Depth) + 0.8
Example: If you had a pond 1m deep, 4.7m long and 3.2m wide:
