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To calculate the liner size for a pond, please enter the dimensions in feet. Fractions of a foot should be entered in decimal form.


*Width of pond ft.   Length of pond ft.

Maximum depth of pond ft.



*Enter the shorter of your two distances in the Width box
and and the longer in the Length box.


Calculating Pond Liner Size

To determine the liner size you need:

  • length - add overall length plus twice the maximum depth
  • width - add the overall width plus twice the maximum depth

It is generally a good idea to add a foot to both of these measurements to allow for error and a few inches over the pond edge.

Example: A pond 6 ft. Wide x 11 ft. Long and 1 1/2 ft. deep will need a liner 10 x 15.

Width:   6 + 1.5 + 1.5 + 1 =10

Length:  11 + 1.5 + 1.5 + 1 =15

One and one half feet deep was only used as an example. This depth may not be sufficient for some areas and is not deep enough for a koi pond. Adjust your size accordingly.

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If you would like assistance with this process, please contact a sales representative via eMail: or by phone: 423.870.2838.