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How Long Should You Run Your Pool Pump?

Reviewed 2026-04

How long should you run the pump? Start with pool gallons, measured flow and your turnover goal. Add power readings and your electricity rate to compare costs.

See how the calculations work in our methodology

Shopping for a pump? Choose by flow at your plumbing resistance →Replacing your pump? Estimate the flow you need first → Pump Size Calculator

Use a flow meter or your pump curve’s operating point at the speed you run. Speed and plumbing resistance change the flow; guessing it from horsepower can give you the wrong runtime and cost.

Optional: Electricity cost estimate

The $0.15/kWh starting value is an example. Check your utility bill for your rate. Leave either cost field blank to calculate runtime alone.

Optional alternative operating scenario

Measure power and flow at the same proposed RPM so both settings move the same daily water volume in the comparison. Check equipment minimum flow separately.

Confirm your inputs

Before you use a dose, compare every input with your fresh tests and measured pool volume. Confirm each example value only after you’ve checked it. When you change a value, you’ll need to confirm it again.

Shopping for a pump?

To choose a pump model, use your measured flow and operating conditions with the selection checklist.

Frequently asked questions

How many hours does my pump need to run?

Use your measured flow to work it out: pool gallons × daily turnovers ÷ GPM ÷ 60 minutes per hour. Then use the exact equipment manuals to check minimum flow and operating conditions for your cell, heater and other equipment. Treat the result as a volume-of-flow estimate; you still need to check filtration and sanitation separately.

What should I do if the estimate is over 24 hours?

Your flow is too low to move the requested daily volume within one day. The result shows the GPM you’d need and the turnovers you can achieve by running continuously. Before changing speed or equipment, review your goal and measured flow with an installer, including the filter, heater, cell and suction-system limits.

How does the electricity comparison work?

Enter measured watts and flow for each setting, plus your electricity rate. Both estimates move the same daily volume, and the alternative must finish within 24 hours. Costs assume year-round operation; your readings determine the difference, so use them rather than assuming a fixed saving from a different pump type.

Can horsepower tell me whether a replacement is allowed?

Check the specific model’s efficiency requirements before you buy. They vary with pump class, hydraulic horsepower and jurisdiction. A nameplate horsepower figure alone won’t establish whether a replacement is allowed; ask the manufacturer about the model and the rules where you live.

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How we calculate this
Your result uses the formulas explained in our methodology. Read the assumptions for your calculation before you use the result.