Pool Pump Size Calculator
Estimate pool pump size from entered measurements.
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What this tool does
Estimate pool pump size from entered measurements. Flow estimate only. Select a pump using total dynamic head and its actual pump curve, not horsepower alone.
How to use the Pool Pump Size Calculator
- Enter or select pool volume in gal.
- Enter or select turnover period (hours).
- Read the calculated result; change any measurement to compare alternatives.
Formula
required US gallons per minute=volume/(turnover hours×60)
- volume
- Pool volume (gal, before metric conversion)
- turnover
- Turnover period (hours)
Flow estimate only. Select a pump using total dynamic head and its actual pump curve, not horsepower alone.
Worked example
For pool pump size calculator, the following measurements illustrate the exact method: Pool volume: 15000; Turnover period (hours): 8.
Inputs
- Pool volume15000 gal
- Turnover period (hours)8
Result
- Required flow (US GPM)31.25
Results explained
- Required flow (US GPM)
- Required flow (US GPM) from the formula above. Flow estimate only. Select a pump using total dynamic head and its actual pump curve, not horsepower alone.
Frequently asked questions
required US gallons per minute=volume/(turnover hours×60)
Flow estimate only. Select a pump using total dynamic head and its actual pump curve, not horsepower alone.
Verify dimensions, product concentration and equipment instructions. Use a qualified pool professional for final chemical dosing and equipment sizing.
No. The entered figures are processed only in your browser.
Follow each input's unit label. Imperial and metric switching converts the labelled geometry and volume measurements.