If your vinyl pool liner is oval in shape, you will want to measure the length from end to end at the center and the width in 2 or 3 places and then take the average of the width. Again, measure inside wall to inside wall for length and width to get the correct pool liner measurement.

Replacing a vinyl liner in an in-ground swimming pool typically costs $700-$1,500 for just the liner, depending on the size and shape of the pool, the thickness (20-30 mil, but typically 28 mil) of the liner and any special colors or designs on the liner.

Installation labor to replace an above ground pool liner can cost $200-$800 or more, depending on local rates and the size and shape of the pool.