Pump size · free
Pool pump size calculator
Type your pool gallons. You get the flow, in gallons a minute, that filters all the water in 6 hours.
Pump flow for a 6-hour turnover
55.6GPM
- Gentler 8-hour turnover
- 41.7 gpm
Flow = gallons ÷ 360 minutes, never below 36 gpm: the residential filtration rate of ANSI/APSP/ICC-15, which the 2021 ISPSC references.
Size the pipes for that flow too: the standard keeps water under 8 ft per second in the return and 6 in the suction.