Free chlorine dose
PROOunces of liquid chlorine (12.5%) to raise free chlorine.
Short answer: Liquid chlorine (12.5% sodium hypochlorite) raises FC by 10 ppm per ~10.5 oz per 10,000 gal. 20,000 gal + 3 ppm = 6.3 fl oz liquid chlorine. Enter your measurements above and the free chlorine dose returns the quantity, unit conversions and an estimated cost instantly, in imperial or metric — no sign-up needed.
What do you need to measure?
What is the answer?
Liquid chlorine
6.3 fl oz
Cups (8 fl oz)
0.8
How does the free chlorine dose work?
Liquid chlorine (12.5% sodium hypochlorite) raises FC by 10 ppm per ~10.5 oz per 10,000 gal.
What does a worked example look like?
20,000 gal + 3 ppm = 6.3 fl oz liquid chlorine.
What do people ask most?
›How long before swimming?
Wait until FC is at target and pump has circulated 1 turnover.
Which pool calculator should you use next?
Where can you learn more?
Read field notes on estimating and materials, or browse every calculator we make.