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Have Questions? Please give us a call at (323)-433-1540
Have Questions? Please give us a call at (323)-433-1540

What Size Liner

Calculate Your Liner Size Needed

Sizing a liner may seem bit intimidating at first, but it is actually easier than you think. With a few simple measurements, you will be on your way to new liner and a new pond.


Ethylene Propylene Diene Monomer, EPDM, is a flexible material that can easily conform to any configurations you choose. When selecting a liner, make sure to get one that is meant for ponds - use our Stratton Pond Guard 45 mil EPDM. It is safe for fish, plants, and wildlife and is the ideal product to give your feature a natural look.


First things first - start by getting the measurements for the longest, widest, and deepest points on your pond or pond you want to make. Next plug these numbers into the this formula: (Length + (2 x Depth + 1)) by (Width + (2 x Depth + 1)). Let's look at an example for a pond that is 10' long, 5' wide, and 3' deep: 
  1. Double the pond's depth: 2 x 3' = 6'
  2. Add 1' extra for anchoring the liner: 6' + 1' = 7'
  3. Determine length: 10' + 7' = 17'
  4. Determine width: 5' + 7' = 12'
    This means your liner would need to be at least 12' x 17'. Since our EPDM liners are sold in precut sizes, you will want to order the 15' x 20' liner. If in doubt when selecting a liner, opt for a larger one. It will give you some extra room to work with or allow you to expand your project.


     If you plan to have fish in your pond, we recommend that your pond is at least 3ft deep - it keeps fish safe from the cold and predators.