Liquid chlorine and bleach calculator for pools
Liquid chlorine and household bleach are the same chemical at different strengths. Enter the strength on the jug and how many ppm you want to add.
Enter your measurements
More options: Jug
- Containers
- 1 container · 1 gal jug
- Per 1 ppm
- 10.2 fl oz (1.3 cups)
- Salt it leaves behind
- 4.9 ppm
In short: work out how much chlorine the rise takes, then how much of your jug holds that much — the label % says how strong it is.
3 ppm × 37,854 L (10,000 gal) = 113.6 g of chlorine
12.5% = 125 g of chlorine per litre → 0.908 L = 30.7 fl oz (3.8 cups)
30.7 fl oz (3.8 cups) ÷ 1 gal per container = 0.24 → 1 container
- Liquid chlorine and bleach lose strength in storage, faster when warm. A jug that has sat through a summer may raise chlorine noticeably less than this — test after 30 minutes of circulation.
Quick answers for common sizes
| Example | Answer |
|---|---|
| How much liquid chlorine to raise 1 ppm in 10,000 gallons | 10.2 fl oz (1.3 cups) |
| How much bleach for a 10,000 gallon pool | 64 fl oz (2 qt) |
Same rise at each label strength
| Strength | Pour in | Per 1 ppm | Containers |
|---|---|---|---|
| 5.25% | 73.1 fl oz (2.3 qt) | 24.4 fl oz (3 cups) | 1 container |
| 6% | 64 fl oz (2 qt) | 21.3 fl oz (2.7 cups) | 1 container |
| 7.5% | 51.2 fl oz (1.6 qt) | 17.1 fl oz (2.1 cups) | 1 container |
| 8.25% | 46.5 fl oz (1.5 qt) | 15.5 fl oz (1.9 cups) | 1 container |
| 10% | 38.4 fl oz (1.2 qt) | 12.8 fl oz (1.6 cups) | 1 container |
| 12.5% | 30.7 fl oz (3.8 cups) | 10.2 fl oz (1.3 cups) | 1 container |
Pool “liquid chlorine” and laundry bleach are both sodium hypochlorite in water. Pool chlorine is usually 10% or 12.5%; household bleach is usually 5–8.25%. The weaker the jug, the more you pour — and nothing else changes.
How the liquid chlorine dose is worked out
grams of chlorine = ppm rise × litres of pool water ÷ 1,000 litres of liquid = grams ÷ (label % × 10) fluid ounces = litres × 33.814 10,000 gal = 37,854 L
The label percentage is read as grams of available chlorine per 100 ml — the bleach industry’s “trade percent”, which OxyChem’s bleach handbook defines as grams per litre divided by 10. So 12.5% is 125 g of chlorine in every litre. Some pool chlorine is sold as 12.5% sodium hypochlorite by weight instead; a supplier’s data sheet shows that strength holds about 142 g of available chlorine per litre, so it raises chlorine roughly 14% more than this calculator assumes. Freshness pulls the other way. The practical answer is the same: dose, circulate, retest.
Liquid chlorine per 10,000 gallons
| Strength | +1 ppm | +3 ppm | +5 ppm | +10 ppm (shock) |
|---|---|---|---|---|
| 12.5% | 10.2 fl oz (1.3 cups) | 30.7 fl oz (3.8 cups) | 51.2 fl oz (1.6 qt) | 102.4 fl oz (3.2 qt) |
| 10% | 12.8 fl oz (1.6 cups) | 38.4 fl oz (1.2 qt) | 64 fl oz (2 qt) | 1 gal (4 qt) |
| 8.25% | 15.5 fl oz (1.9 cups) | 46.5 fl oz (1.5 qt) | 77.6 fl oz (2.4 qt) | 1.21 gal (4.8 qt) |
| 7.5% | 17.1 fl oz (2.1 cups) | 51.2 fl oz (1.6 qt) | 85.3 fl oz (2.7 qt) | 1.33 gal (5.3 qt) |
| 6% | 21.3 fl oz (2.7 cups) | 64 fl oz (2 qt) | 106.7 fl oz (3.3 qt) | 1.67 gal (6.7 qt) |
| 5.25% | 24.4 fl oz (3 cups) | 73.1 fl oz (2.3 qt) | 121.9 fl oz (3.8 qt) | 1.9 gal (7.6 qt) |
The most-searched version — how much liquid chlorine to raise 1 ppm in 10,000 gallons — and the bleach version, how much bleach for a 10,000 gallon pool, each have a worked page. For shock levels, see how much liquid chlorine to shock a 10,000 gallon pool.
Bleach or pool chlorine?
- Same chemical, different strength. A 121 oz bottle of 6% bleach holds about the same chlorine as 58 fl oz of 12.5% pool chlorine.
- Plain only. Scented, “splash-less”, color-safe and gel bleaches contain other ingredients or less chlorine. Use plain, unscented regular bleach.
- Salt builds slowly. Every ppm of chlorine from bleach or liquid chlorine leaves about 1.65 ppm of salt once it is used. Over a season that is a few hundred ppm — harmless, and it helps a salt cell.
- pH. Liquid chlorine is strongly alkaline in the jug, but most of that reverses as the chlorine is used up, so it moves pool pH less than you might expect. A small upward drift is common.
How to add liquid chlorine
- Test free chlorine and pH. Decide the rise from your stabilizer level (see the chlorine and stabilizer calculator).
- With the pump running, pour the measured dose slowly into the water in front of a return jet, low to the surface to avoid splashes on clothes and decking.
- Wait at least 30 minutes and retest. Add acid or other chemicals only after the chlorine has mixed in, in a different spot.
- Store jugs closed, upright, shaded and away from acid. Buy what you will use in a few weeks.
What you’ll need
- Liquid pool chlorine (sodium hypochlorite)Budget price
Adds chlorine without stabilizer or calcium. Strength is printed on the label — commonly 10% or 12.5% — and it weakens with age and heat, so buy it fresh.
See options on Amazon (opens in a new tab) - Measuring pitcher (marked in oz and ml)Budget price
Measure doses instead of glugging from the jug. Keep one for acid and a separate one for chlorine.
See options on Amazon (opens in a new tab) - Chemical splash gogglesBudget price
Muriatic acid and liquid chlorine splash. Indirect-vent goggles cost little next to an eye injury.
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As an Amazon Associate we earn from qualifying purchases. Links to products are affiliate links — they cost you nothing extra and help keep these calculators free.
Frequently asked questions
How many ounces of liquid chlorine raise a pool by 1 ppm?
About 10.2 fl oz of 12.5% per 10,000 gallons, or 12.8 fl oz of 10%. Worked through on how much liquid chlorine to raise 1 ppm in 10,000 gallons.
How much bleach should I put in my pool?
For a 3 ppm daily top-up in 10,000 gallons, about 64 fl oz (half a gallon) of 6% bleach, or 46.5 fl oz of 8.25%. See how much bleach for a 10,000 gallon pool.
How much bleach do I put in a kiddie pool?
None. The CDC says it is unsafe to add chlorine or bromine to small inflatable or plastic kiddie pools; empty them at least daily and let them dry. How much water that is: how many gallons in a kiddie pool. To disinfect an empty kiddie pool after an accident, follow the CDC’s cleaning steps.
Does liquid chlorine go bad?
It doesn’t spoil, but it loses strength over time, faster in heat and sunlight. Buy fresh, store it cool and shaded, and expect an old jug to raise chlorine less than the label suggests.
Can I add liquid chlorine and acid at the same time?
No. Chlorine and acid together release chlorine gas. Add one, let the pump circulate it, and add the other later in a different spot — never in the same bucket or pitcher.
Related guides
Sources
- OxyChem — Soda Bleach Solutions Handbook (re-hosted copy) (opens in a new tab) — Trade percent = grams per litre of available chlorine ÷ 10; weight % NaOCl ≈ 1.05 × weight % available chlorine; strength and specific gravity table.
- HASA — Hasachlor sodium hypochlorite SDS (2026) (opens in a new tab) — Pool liquid chlorine: sodium hypochlorite 12.5% by weight, about 1.2 g/ml.
- Hill Brothers — Sodium hypochlorite 12.5% specifications (opens in a new tab) — 12.5% by weight = 142 g/L available chlorine (14.2 trade percent), 11.9% available chlorine by weight.
- Pool Essentials chlorinating liquid (retail listing) (opens in a new tab) — A 10% sodium hypochlorite pool chlorine.
- CloroxPro — Germicidal Bleach (retail listing) (opens in a new tab) — A concentrated household-type bleach at 8.25%.
- Clorox Regular Bleach SDS (2020) (opens in a new tab) — Household bleach: sodium hypochlorite 5–10% by weight.
- CDC Healthy Swimming — Home pool and hot tub water treatment and testing (opens in a new tab) — pH 7.0–7.8; free chlorine at least 1 ppm in pools (2 ppm with cyanuric acid) and 3 ppm in hot tubs; no CYA in hot tubs; test twice a day.
- CDC Healthy Swimming — Inflatable and plastic kiddie pools (opens in a new tab) — Empty kiddie pools at least daily; it is unsafe to add chlorine or bromine to them.
- CDC — Pool chemical injuries press release (2014) (opens in a new tab) — Never mix pool chemicals, especially chlorine products with acid; add chemical to water, never water to chemical.
- CDC — Pool chemical safety: storage poster (opens in a new tab) — Separate acid and chlorine; don’t mix different types of chlorine; keep chemicals cool, dry and in original containers.