Cal-hypo dose calculator
PROCal-hypo (65%) to raise your free chlorine.
Short answer: oz = (gallons ÷ 10,000) × 0.2 × ppm to raise. 20,000 gal + 3 ppm = 1.2 oz cal-hypo. Enter your measurements above and the cal-hypo dose calculator 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?
Cal-hypo (65%)
1.2 oz
Grams
34 g
How does the cal-hypo dose calculator work?
oz = (gallons ÷ 10,000) × 0.2 × ppm to raise.
What does a worked example look like?
20,000 gal + 3 ppm = 1.2 oz cal-hypo.
What do people ask most?
›Raises calcium?
Yes — expect ~7 ppm calcium hardness per 10 ppm FC dose.
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.