You have the reading. Here are the ounces.

Type what the strip says. Get the ounces for the jug in your shed, at the strength on its label.

Worked example 15,000 gal chlorine pool · CYA 40
Free chlorine — match your pad
61 fl oz FC 1.0 5.0 target 3.0 floor ppm free chlorine LOW

Liquid chlorine 12.5%

61 fl oz

7.7 cups · 1.82 L

salt +3.3

Cal-hypo 73%

11 oz

312 g

hardness +2.5

Dichlor

14.4 oz

408 g

CYA +3.6 · TA −1.4

Same pool, same reading, three answers.

Works offline No account $5.99 once, no subscription Check the math yourself

Logging a test in PoolDose using on-screen strip colour swatches for free chlorine, pH, total alkalinity and calcium hardness.
Tap the swatch that matches your pad, or type it.
PoolDose dose calculator: free chlorine 1 to 5.8, liquid chlorine at 12.5 percent strength, result add 29 fluid ounces, retest after 30 minutes.
Pick the jug you own and its strength.
PoolDose home screen: Backyard pool, 5,944 gallons, one thing to fix, with the logged dose of 23 fluid ounces of liquid chlorine and the latest test verdicts.
What to fix, in order, with the amount on the line.

Too big for one dose

Total alkalinity 60 → 90 ppm

60 75 90 0h 6h 12h 3 lb 3 lb 4.9 oz

6 lb 4.9 oz is more than one safe addition, so it splits and says when to retest.

PoolDose hot tub profile: 350 gallon spa on bromine with target ranges for bromine, pH, total alkalinity and calcium hardness.
A 350-gallon hot tub on bromine.

Every dose calculation is free. Pro is $5.99 once — charts, LSI, reminders, full history.

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Read before you add anything

If the product label and PoolDose disagree, follow the label.

  • Never mix pool chemicals.
  • Add chemicals to water, never water to chemicals.
  • When in doubt: add less, circulate, retest.