Pool Volume Calculator
Calculate your pool's exact water volume in litres and gallons. Essential for accurate chemical dosing and equipment sizing.
Enter Your Pool Details
For a flat-bottom pool, enter the same depth in both fields (or just the shallow end).
Your Results
Enter your pool dimensions to see results
Next: Chemical Calculator
Use your pool volume to calculate exact chemical doses
Why It Matters
Why You Need to Know Your Pool Volume
Your pool's volume is the single most important number for maintaining healthy water. Every chemical dosage - chlorine, pH adjusters, alkalinity, calcium hardness, and stabiliser - is calculated as a concentration per litre of water. Without knowing your volume, you're either over-dosing (wasting money and irritating swimmers) or under-dosing (risking algae and bacteria).
Pool volume also determines the right pump and filter sizing. A pump that turns your pool over every 6–8 hours is the Australian standard - but that calculation requires knowing exactly how many litres you're working with.
Most Australian residential pools hold between 30,000 and 80,000 litres. An average 8m × 4m pool with a 1.5m average depth holds approximately 48,000 litres (about 12,700 US gallons).
Small Pool
Under 30,000L
6m × 3m × 1.5m avg
Medium Pool
30,000–60,000L
8m × 4m × 1.5m avg
Large Pool
60,000–100,000L
12m × 5m × 1.5m avg
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