Pool volume, turnover and pump sizing calculators
Pool volume, turnover and equipment-sizing calculations for pool builders and technicians. Check water quality and project requirements separately.
Method & worked example
From pool volume to circulation flow
Use average water depth for a rectangular pool. The turnover period below is an illustrative input, not a recommended operating schedule.
| Step | Calculation | Result |
|---|---|---|
| Water volume | 8 m × 4 m × 1.5 m average depth | 48 m³ = 48 kL |
| Circulation flow | 48 m³ / 8 h | 6 m³/h |
| Flow in litres per minute | 6 × 1,000 / 60 | 100 L/min |
Why turnover does not select the pump
Check the required flow against the pump curve at the system's total head, including pipework, fittings, filter and other equipment. Check the filter's permitted flow range and the suction arrangement. Free-flow pump ratings do not show the delivered flow through an installed pool system.
Turnover arithmetic does not establish disinfection performance or safe suction design. Pool use, water quality, equipment requirements and the applicable project requirements must be assessed separately.
Explore POO-004 pool pump sizing, chlorinator sizing and pool heating. To compare operating costs, use the pump energy example.
Further reading: Australian Government pool-pump energy guidance.
Static educational example · Updated 1 October 2026 · Methods and limitations. Project calculations run in the subscription application; New accounts require approval.
Why it matters on the job
Turnover that complies
Required flow from volume and turnover, with pipework sized to suit.
Pumps named to real gear
Closest single- or variable-speed model from real AU ranges.
Chemistry balanced
Record water-test results and the selected treatment targets before assessing a dose.
5 Swimming Pools calculators
Every calculator in this category, by its reference code. Running them requires an approved Tenselo account with access to the relevant calculators.
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POO-001 Chlorinator Sizing
Pool volume + climate -> required salt-cell output (g/hr) + suitable models
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POO-002 Pool Chemical Calculator
Water test (pH, FC, TA, CH, CYA, salt) -> balancing chemical doses
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POO-003 Pool Heating & Heat Loss
Heat-up + maintenance duty, heater size & running cost
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POO-004 Pool Pump Calculator
Pool volume + turnover -> required flow (LPM) + suitable AU pump models
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POO-005 Solar Pool Heating Area
Collector area for an (unglazed) solar pool-heating system, by pool size, goal & climate
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