Chlorine dose by pool volume

How much liquid chlorine raises free chlorine by 2 ppm, at every common pool volume. Open a volume for the full table across bleach, cal-hypo and dichlor.

Every dose below is worked out for that exact volume. If yours is not on the list, the calculator takes any number.

Pool volume	Liquid chlorine 12.5% for +2 ppm
5,000 litres	80 mL
7,000 litres	112 mL
10,000 litres	160 mL
15,000 litres	240 mL
20,000 litres	320 mL
25,000 litres	400 mL
28,000 litres	448 mL
30,000 litres	480 mL
35,000 litres	560 mL
40,000 litres	640 mL
45,000 litres	720 mL
50,000 litres	800 mL
60,000 litres	960 mL
70,000 litres	1.12 L
80,000 litres	1.28 L

What changes with the product you pick

Chlorine dose scales with volume and with the rise you want, and nothing else. Two of these products change more than the chlorine: cal-hypo adds calcium hardness, which a plaster pool in hard water does not need, and dichlor adds roughly 0.9 ppm of cyanuric acid for every 1 ppm of chlorine, so it drives stabiliser up fast if you use it all season. Liquid chlorine and bleach leave salt behind and nothing else.

Sources

1. CDC, Home Pool and Hot Tub Water Treatment and Testing (May 10, 2024). Minimum free chlorine for pools and hot tubs; DPD tests bleach above 10 ppm
2. Trouble Free Pool, CYA Chlorine Relationship (Chlorine/CYA chart). Minimum and target free chlorine by CYA
3. NIST Special Publication 811, Appendix B.8: conversion factors. Liters per US gallon

More dosing tables