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Pool Math Calculator

Enter your pool size and current chemical levels β€” we'll tell you exactly what to add and how much. Australian products & measurements.

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Step 1 β€” Calculate Your Pool Volume

All chemical doses are based on your pool's volume. Start here.

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Litres (estimated pool volume)

πŸ’‘ Tip: This volume auto-fills into all calculators below

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pH Adjuster

Raise or lower pH to the ideal range

Or enter manually if skipped Step 1
Ideal: 7.2 – 7.6
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Chlorine Dose

Raise free chlorine to the safe level

Ideal: 1 – 3 ppm
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Total Alkalinity

Stabilise your pH by balancing TA

Ideal: 80 – 120 ppm
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Calcium Hardness

Prevent scaling or corrosion

Ideal: 200 – 400 ppm
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Stabiliser (CYA)

Protect chlorine from UV breakdown

Ideal: 30 – 50 ppm
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Salt Level (Saltwater Pools)

Get your salt cell running at peak efficiency

Ideal: 3,000 – 4,000 ppm
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Important: These calculations are guides based on standard industry formulas. Always add chemicals slowly and re-test your water after each adjustment. Never add chemicals directly to the pool β€” pre-dissolve in a bucket of water first. Results may vary depending on your water source, pool surface type, and temperature. When in doubt, take a water sample to your local pool shop for a full analysis.
Reference Guide

Ideal Pool Water Chemistry β€” Australian Targets

Test your water weekly in summer, fortnightly in winter. Keep these levels in the green zone.

Parameter Ideal Range Acceptable Range Effect if Out of Range Product to Use
pH 7.2 – 7.6 7.0 – 7.8 High pH = cloudy water, chlorine ineffective. Low pH = skin/eye irritation, corrosion. Dry Acid to lower Β· Soda Ash to raise
Free Chlorine 1 – 3 ppm 0.5 – 5 ppm Too low = algae & bacteria. Too high = irritation & bleached swimwear. Liquid Chlorine Β· Granular
Total Alkalinity 80 – 120 ppm 60 – 180 ppm Low TA = pH swings wildly. High TA = pH hard to lower, cloudy water. Bicarb Soda to raise Β· Acid to lower
Calcium Hardness 200 – 400 ppm 150 – 500 ppm Low = etching of plaster & metal corrosion. High = scaling & cloudy water. Calcium Chloride to raise
Cyanuric Acid (CYA) 30 – 50 ppm 20 – 80 ppm Too low = chlorine destroyed by UV in hours. Too high = chlorine lock. Stabiliser / Conditioner
Salt (saltwater pools) 3,000 – 4,000 ppm 2,500 – 5,000 ppm Low = salt cell can't produce chlorine. High = salty taste & eye irritation. Pool Salt to raise Β· Dilute to lower
Total Dissolved Solids < 1,500 ppm < 2,000 ppm High TDS = chemicals less effective, cloudy water, staining. Partial water change (dilution)
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Is Your Pool Beyond Chemistry?

If your pool surface is cracked, the tiles are badly scaled, or it needs a full acid wash and resurface β€” no amount of chemicals will fix that. We recommend Concrete Pool Renovation for the big jobs.

Visit Concrete Pool Renovation β†’