About Pool Pump Size Calculator
Last updated 15 October 2026
Pool Pump Size Calculator is an independent publication for residential pool owners. It explains water measurements, circulation duty and secondary pool-heating estimates. It does not represent a pump manufacturer or claim that equipment was installed or tested here.
How the methods are checked
The calculations start with named primary sources: manufacturer manuals, NIST unit definitions and US Department of Energy pump-system guidance. Each tool states its formula, assumptions, version and check date. Worked examples are recomputed from their inputs. Historical engineering sources are identified by edition and are not treated as current residential law.
The main calculator separates required flow from actual flow and keeps head and equipment limits visible. Water-volume measurements, filter ratings and heater loads are separate tasks. Missing measurements remain unknown instead of becoming zero.
Research and equipment comparisons
Equipment discussion uses specifications, exact model records and published manuals. A family name is not proof that every revision has the same curve or controls. Conflicting evidence is narrowed or flagged. No hands-on testing, engineering qualification or manufacturer endorsement is claimed.
Sources support the method, but a calculation is still limited by the inputs. A source-based scenario is different from a measurement at your pool. See how a pump works for the distinction between water movement and treatment.
Corrections
Use the email address on contact and corrections to report a source change or reproducible calculation issue. Include the page, tool version, units, inputs and the expected versus displayed result. There is no need to send an address, equipment serial number or account credentials. The site's editorial operator maintains the source record and dated formula revisions.
The privacy policy describes browser saving and contact data. The affiliate disclosure describes the site's current commercial-link position.