How To Measure A Swimming Pool Liner

Inground Swimming Pool Liner Installation
This guide will show you how to measure a swimming pool liner for most standard shape pools. If you have a free form pool (not a rectangle) please see our free form pool liner measurement guide. To start off please familiarize yourself with some common terms used when measuring your inground pool liner.

FINISHED DEPTH: The finished depth revers to the actual finished depth of your pool. Unless you have a flat bottom pool you will have a finished deep end and shallow end pool depth. The finished depth is typically measure from the liner track/bead receiver to the swimming pool floor. Click HERE to see examples of common swimming pool bottoms.

POOL COPING: Your pool coping is typically the finished edge of your deck and is made of powder coated aluminum. Your pool coping also has the liner track (Bead Receiver) built into it, the liner track holds the liner bead in place. The coping sits on top of your pool wall panels, if the finished edge of your deck is exposed concrete or stone pavers then you probably have cantilever coping. Click HERE to learn more about coping and see what style your pool has.
COPING TRACK/BEAD RECEIVER: The swimming pool liner coping track or bead receiver is a small opening that runs all around the pool right underneath the coping, the liner bead snaps into the coping track. ALL SWIMMING POOL FINAL DEPTH MEASUREMENTS ARE TAKEN FROM YOUR BEAD RECEIVER/COPING TRACK.
Two of the most common swimming pool liner beads are Hydra Pools & Ester Williams. Hydra is one of the oldest and premier in-ground pool liner manufactures in the country. Their liners use a “Standard” bead which is the most common type of bead used on vinyl inground swimming pool liners. Click the links below to see liner bead samples.

Vinyl Swimming Pool Liner Bead

  • Hydra Pools Liner Bead, Click HERE
  • Ester Williams Liner Bead, Click HERE

POOL LINER BEAD: The pool liner bead is wedge shaped strip on the top of the wall to hold the liner in the receiver. There are a few different types of liner beads, feel free to send us a picture or sample if you are not sure what type of liner bead your pool has.

BREAK LINE: (BREAK POINT) – The break line refers to any place on the swimming pool floor where the angle changes.

Common Nomenclature Found On All Pool Liner Measurement Forms:

  • A – Overall Width
  • B – Overall Length
  • F – Overall Depth
  • D – Shallow End Depth
  • E – Depth From Bottom Of Panel To Floor
  • J – Back Slope/End Slope
  • K – Hopper Bottom Length
  • G – Hopper Bottom Width
  • L – Slope/Transition Slope
  • M – Shallow End/Wader
  • H – Side Slope
  • I – Side Slope

Measuring Inground Vinyl Pool Liner

How To Measure A Swimming Pool Liner – Rectangle Liners

Tools Required For Measuring An Inground Swimming Pool Liner:

  • 2 – 100ft fiberglass tape measures (preferable different colors)
  • 2- stakes (12” nails, pieces of ½ re-bar or similar)
  • Telescopic pole with measuring markings (used to measure the slopes and depths)
  • Plumb bob and String
  • Pool Warehouse measuring sheets and pen
  • Utility knife
  • Chalk
  • Level

First we will cover the basics of measuring DEPTHS AND SLOPES. When measuring any slope, the measurement is of the horizontal distance of the slope, NOT the actual length of the slope on the pool floor. When measuring the side and back (end) slopes of any pool DO NOT ASSUME that any of the slopes are the same. Even if they look the same, measure them all. **Be sure to DOUBLE CHECK that your dimensions along the length of the pool add up to equal the total length of the pool and that your width dimensions equal the total width.

To measure the SLOPES of an EMPTY pool, simply hold a measuring stick or tape measure horizontally from the top of the slope, and drop a plumb bob from the ruler to where the slope meets the hopper pad and record this measurement.

To measure the SLOPES of a FULL pool, take a long pole and feel where the slope meets the hopper pad or where the long slope meets the shallow end. At that point, bring the pole to the coping at a 90 degree angle and make a chalk mark. This should be done for all break points first, both length and width, then measure the distance between the marks. For the first mark from the edge of the pool, measure from the inside of the wall, not from the coping.

To measure the DEPTH of an EMPTY pool, hold a measuring pole vertically from the CORNER of the hopper pad and run a string across the top of the pool. Record this height. NOW SUBTRACT the distance from the top of the coping to the bead receiver. Do not measure from the center of the pad as it may be deeper and consequently cause wrinkles.

To measure the DEPTH of a FULL pool, hold a measuring stick vertically at the corner of the hopper pad and note the depth of the water, then measure the distance from the water line to the bead receiver. Add these to get the finished depth.
When measuring the LENGTH AND WIDTH of a pool, measure INSIDE the pool from wall to wall BELOW the coping.
NOTE: On symmetric pools (with no left or right bend) if you are requested to measure both walls, all four corners, measure diagonals, or several wall heights, PLEASE DO, although they need not be recorded unless there is a difference in any of them that might affect liner fit.

How To Measure A Swimming Pool Liner – Diagram

How To Measure A Swimming Pool Liner

Swimming Pool Liner Slope Measurement – Pro Tip

How To Measure An Inground Swimming Pool Liner

Understanding The Shallow End Pool Floor – Pro Tip

Inground Pool Liner Measurement

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