How is pool liner length calculated?

• A. Maximum length plus depth
• B. Maximum length plus twice the depth plus 3 feet
• C. Maximum length plus 3 feet
• D. Maximum length plus twice the depth

Answer: (B)

Sizing a pool liner hinges on how much material you need to wrap around the interior surfaces and have some margin for overlap. Start with the pool’s maximum interior length, then add enough to cover the vertical sides on both ends. That means adding twice the depth to account for lifting the liner up the sides, plus a little extra for overlap and trimming—3 feet in this standard method. So the total liner length = maximum length plus twice the depth plus 3 feet. For example, a 30 ft long pool with 5 ft depth would need 30 + 2×5 + 3 = 43 ft of liner.