Practical, no-fluff guides for measuring your pool and making sense of the numbers. More are added as we write them.
Start with whichever calculator matches your pool's shape — each one includes a step-by-step "how to calculate" section with a worked example. The guides below go deeper on the topics people ask about most.
How to clear a green pool — the SLAM method, step by step, with the chemistry explained and the dosing left to your test kit.
Every shape calculator doubles as a guide. The most-used starting points:
If your pool has a deep end, switch the floor option to Sloped or Hopper before reading the volume — a flat-depth estimate can be off by a fifth or more.