Pool Salt Calculator Australia
Work out how much pool salt to add for your salt chlorinator based on pool volume and current salt reading — then confirm with the free dosing calculator.
Fastest path
Enter saltwater as your system type, pool volume, and salt reading for an exact recommendation.
Open pool chemical calculatorHow much pool salt to add
Use pool-grade salt (not rock salt with anti-caking agents). Industry rule of thumb: about 10 kg of salt raises salinity by ~1000 ppm in 10,000 L. Equivalently: kg ≈ (litres × ppm increase) ÷ 1,000,000. Figures below are approximate — confirm with the calculator and your chlorinator manual (many AU units target about 3200–4000 ppm).
| Pool volume | Raise salt by 500 ppm | Raise salt by 1000 ppm |
|---|---|---|
| 30,000 L | 15 kg | 30 kg |
| 50,000 L | 25 kg | 50 kg |
| 75,000 L | 37.5 kg | 75 kg |
| 100,000 L | 50 kg | 100 kg |
Example: a 50,000 L pool reading 2700 ppm that needs ~3700 ppm needs about a 1000 ppm lift → roughly 50 kg of pool salt.
Target salt ranges for saltwater pools
- Typical ideal band: about 2700–4500 ppm (site saltwater rules)
- Many AU chlorinator manuals: often ~3200–4000 ppm — check yours
- Too low: chlorinator may under-produce chlorine or show a low-salt alarm
- Too high: corrosion risk — partially drain and refill (you cannot chemically remove salt)
Absolute operating window on this site is roughly 2000–6000 ppm. Stay inside your manufacturer’s range whenever it is narrower.
When salt is low vs high
- Low salt: add pool salt in stages, circulate, then retest before adding more
- High salt: drain 20–30% (or more if very high), refill with fresh water, retest, then fine-tune
- Heavy rain dilutes salt; evaporation concentrates it — retest after big weather swings
Safe dosing steps
- Test salt, free chlorine, and pH first.
- Confirm pool volume in litres and your chlorinator’s target ppm.
- Calculate the dose from the chart or calculator.
- With the pump running, broadcast salt around the shallow end (not in the skimmer).
- Brush any undissolved salt off the floor so it dissolves fully.
- Retest after 24 hours of circulation before adding more.
Related dosing tools
Pool salt products
Recommended pool salt
Pool-grade salt options available on Amazon Australia.
Kissner Clean & Pure Pool Salt 40 lb Bag
High purity pool salt for saltwater chlorinators. 99.8% pure. Fast dissolving.
$48.00
Amazon paid link. Confirm current price on Amazon.
Pool Salt 25kg for Salt Electrolysis Systems
High purity pool salt for saltwater chlorinator and salt electrolysis systems.
$35.18
Amazon paid link. Confirm current price on Amazon.
As an Amazon Associate, we earn from qualifying purchases.
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