Independent pump guidance • Verified product links • Updated for 2026
Free interactive calculator

Pool Pump Sizing Calculator

Estimate the circulation flow your pool needs, then use that target with a manufacturer pump curve.

Base flow
32 GPM
Design target
36 GPM
Starting HP range
1–1.5 HP
Best next comparison

Your target falls in the compact-flow range. Compare smaller controllable models and confirm the filter limit.

See the relevant pump collection →

Estimate only. Pipe diameter, filter rating, heater, elevation and fittings change the final system curve. Confirm the selection against the manufacturer pump curve or a qualified installer.

How to use the result

Treat this output as a planning estimate. Verify the final choice using the manufacturer’s current manual and pump curve, the filter’s design-flow limit and the requirements of any heater, cleaner, salt cell or water feature.

Measurements improve the answer

Pool volume, actual pipe diameter, clean-filter pressure, equipment elevation and voltage all affect the final selection. If those inputs are unknown, measure them before ordering equipment or changing electrical service.

Compare variable-speed pool pumps