calcs.homes
calcs.homes
Enter your pool volume and target turnover time to find the flow rate you need, and a recommended pump size to hit it.
Estimate only — actual required HP also depends on pipe size, filter type, and plumbing run length.
Flow rate is your pool volume divided by the hours you want it to fully turn over — most residential pools target an 8-hour turnover. That flow rate (in gallons per minute) then maps to a pump horsepower, though actual head pressure from pipe length, fittings, and filter type can shift the exact model you need — a pool professional can size it precisely from your plumbing layout.
It's how long it takes your pump and filter to circulate a volume of water equal to your entire pool. 8 hours is the standard target for residential pools, letting the whole pool filter once during a typical day.
No — oversized pumps waste electricity and can even reduce filter efficiency by pushing water through too fast. Variable-speed pumps sized to your actual flow needs are usually the most efficient choice.