{"id":"pool-pump-turnover-calculator","name":"Pool Pump Turnover Calculator — GPM and Energy Cost","shortName":"Pool Pump Turnover","canonicalUrl":"https://calcurhome.com/calculators/pool-pump-turnover-calculator","catalogUrl":"https://calcurhome.com/api/calculators","category":{"id":"pools-spas","name":"Pools & spas","url":"https://calcurhome.com/calculators/category/pools-spas"},"language":"en-US","audience":"US homeowners, DIYers and home-project planners","primaryKeyword":"pool pump turnover calculator","secondaryKeywords":["pool pump GPM calculator","pool turnover rate calculator","pool flow rate calculator","pool pump runtime calculator","pool pump electricity cost calculator","pool gallons per hour calculator"],"description":"Calculate pool pump turnover flow in GPM and GPH from pool volume, turnovers, and runtime, then estimate daily and monthly electricity cost.","directAnswer":"Pool pump turnover flow equals pool volume multiplied by desired turnovers, divided by daily runtime. Convert gallons per hour to gallons per minute by dividing by 60. Energy cost comes from entered pump watts, runtime, and electricity rate. This sizing result does not determine pump horsepower or prove hydraulic compatibility.","inputs":[{"key":"poolGallons","label":"Pool volume","unit":"gal","defaultValue":15000,"min":0,"max":10000000,"step":100,"help":"Use a measured or separately calculated pool volume."},{"key":"turnovers","label":"Desired turnovers per day","unit":"turnovers","defaultValue":1,"min":0,"max":24,"step":0.25,"help":"Use the operating target required for your pool, equipment, and local rules."},{"key":"runtimeHours","label":"Pump runtime per day","unit":"hours","defaultValue":8,"min":0.25,"max":24,"step":0.25},{"key":"pumpWatts","label":"Entered pump power","unit":"watts","defaultValue":1200,"min":0,"max":100000,"step":1,"help":"Enter measured or manufacturer-listed watts at the operating speed; horsepower is not inferred."},{"key":"electricRate","label":"Electricity rate","unit":"$/kWh","defaultValue":0.17,"min":0,"max":100,"step":0.01}],"formula":{"title":"Pool turnover flow and electricity cost formulas","expression":"Target GPH = pool gallons × turnovers ÷ runtime hours; target GPM = target GPH ÷ 60. Daily kWh = entered watts ÷ 1,000 × runtime hours; monthly cost = daily kWh × electricity rate × 30.4.","explanation":"The turnover calculation spreads the selected daily water volume evenly across the hours the pump runs. Dividing hourly flow by 60 produces gallons per minute. The separate energy calculation converts entered electrical watts to kilowatts, multiplies by runtime, and applies the entered utility rate; it does not infer motor horsepower."},"measurementGuide":["Calculate pool volume from measured dimensions and average depth, or use a reliable fill-meter value when available.","Enter the turnover target and daily runtime required by the pool’s operating plan, equipment instructions, and applicable local rules.","Use measured running watts at the intended speed when possible; otherwise use manufacturer data for that exact pump and operating point.","Read the all-in electricity price per kilowatt-hour from a recent bill, including applicable supply and delivery charges."],"buyingTips":["Compare the calculated target flow with the filter’s rated flow and a hydraulic assessment of the installed pipe, fittings, heater, sanitizer, and water features.","Favor properly sized variable-speed equipment and evaluate operation at lower speeds where compatible, because power demand can vary substantially with speed and system resistance.","Confirm automation, freeze protection, minimum equipment flows, priming, and manufacturer warranty requirements before changing schedules or speeds.","Use a flow meter or qualified pool professional to verify actual circulation instead of treating nameplate power or a turnover estimate as measured hydraulic performance."],"workedExample":{"title":"One daily turnover for a 15,000-gallon pool","scenario":"A 15,000-gallon pool is planned for one turnover during eight operating hours. The pump draws 1,200 watts, and the household electricity rate is $0.17 per kilowatt-hour.","result":"The average target is 1,875 GPH, or 31.25 GPM. The entered power and runtime use 9.6 kWh daily, costing about $1.63 per day and $49.61 per 30.4-day month."},"commonQuestions":[{"question":"What does one pool turnover mean?","answer":"One turnover means moving a water volume equal to the pool’s estimated capacity through the circulation system. It does not mean every water molecule passed through the filter, and it does not independently establish adequate sanitation, mixing, filtration, or required runtime."},{"question":"Does this calculator choose pool pump horsepower?","answer":"No. It intentionally reports a target average flow without guessing horsepower. Pump selection requires the system’s total dynamic head, pipe and fitting losses, filter and heater limits, pump performance curves, electrical conditions, and operating speeds. A qualified professional should verify those factors."},{"question":"Why might actual pool flow differ from calculated GPM?","answer":"The result is volume divided by time, while actual flow depends on pump speed and the resistance of pipes, valves, fittings, filters, heaters, sanitizers, and water features. Dirty filters, changing valve positions, or inaccurate volume estimates can also shift measured GPM."},{"question":"How is monthly pool pump cost estimated?","answer":"The calculator multiplies entered watts by daily runtime, converts watt-hours to kilowatt-hours, applies your electricity rate, and uses 30.4 days for a monthly average. Variable-speed schedules need separate calculations by speed because watts can differ greatly across operating settings."}],"sources":[{"name":"CDC — Home Pool and Hot Tub Water Treatment and Testing","url":"https://www.cdc.gov/healthy-swimming/about/home-pool-and-hot-tub-water-treatment-and-testing.html","note":"Federal homeowner guidance on circulation, water testing, and following pool-equipment and chemical-product directions."},{"name":"ENERGY STAR — Pool Pumps","url":"https://www.energystar.gov/products/pool_pumps","note":"U.S. EPA information about pool-pump efficiency, operation, and energy use."}],"defaultCalculation":{"inputs":{"poolGallons":15000,"turnovers":1,"runtimeHours":8,"pumpWatts":1200,"electricRate":0.17},"result":{"value":"31.25","unit":"GPM","label":"Average target flow","lines":[{"label":"Average target flow per hour","value":"1,875 GPH"},{"label":"Water moved per day","value":"15,000 gal"},{"label":"Daily pump energy","value":"9.6 kWh"},{"label":"Estimated daily cost","value":"$1.63"},{"label":"Estimated monthly cost","value":"$49.61"}],"summary":"Move approximately 31.25 GPM (1,875 GPH) during the entered 8-hour runtime; estimated monthly energy cost is $49.61.","note":"Turnover is an average-flow planning target, not a pump-selection result. Verify actual system flow, filter limits, pipe hydraulics, local requirements, and the equipment manufacturer’s instructions. No horsepower is estimated."}},"reviewedOn":"2026-07-24","disclaimer":"Planning estimate only. Verify product coverage, supplier rounding, local codes and structural requirements before purchase or construction."}