Pool Pump kWh Calculator
Last updated 15 October 2026
Enter measured watts, daily hours and operating days to get energy use and cost.
Your result will appear here
Enter your measurements, then choose Calculate.
Use the energy total and tariff range to budget pump operation.
Still unknown or unconfirmed
Formula, sources and blank printable worksheet
Initial electricity references: EIA July 2026 and BLS September 2026. These observations define an editable scenario range, not local price bounds. Set both rates to your tariff for a single-rate result.
ENERGY-1: running kWh/day = Σ watts × hours / 1000. Add measured standby × off-hours / 1000. Cost = Σ period kWh × tariff.
Calculation version 1.0 uses historical engineering references for arithmetic, not current residential law.
- DOE / Hydraulic Institute, Improving Pumping System Performance, second edition https://www.energy.gov/sites/default/files/2014/05/f16/pump.pdf
- EIA July 2026 residential electricity: 0.1831 USD/kWh; released 24 September 2026 https://www.eia.gov/electricity/monthly/epm_table_grapher.php?t=epmt_es1a
- BLS September 2026 US city electricity via FRED: 0.196 USD/kWh; released 14 October 2026 https://fred.stlouisfed.org/series/APU000072610
| Quantity / unit | Reading | Source and date |
|---|---|---|
| Operating days | ________________ | ________________ |
| Electricity reference low, USD/kWh | ________________ | ________________ |
| Electricity reference high, USD/kWh | ________________ | ________________ |
| Currency label | ________________ | ________________ |
| Measured standby watts, schedule A | ________________ | ________________ |
| Measured standby watts, schedule B | ________________ | ________________ |
| Water moved and accessory service comparison | ________________ | ________________ |
| Schedule A, period 1: Measured input watts | ________________ | ________________ |
| Schedule A, period 1: Hours per day | ________________ | ________________ |
| Schedule A, period 1: Period low tariff / kWh (or use global rate) | ________________ | ________________ |
| Schedule A, period 1: Period high tariff / kWh (or use global rate) | ________________ | ________________ |
| Schedule A, period 2: Measured input watts | ________________ | ________________ |
| Schedule A, period 2: Hours per day | ________________ | ________________ |
| Schedule A, period 2: Period low tariff / kWh (or use global rate) | ________________ | ________________ |
| Schedule A, period 2: Period high tariff / kWh (or use global rate) | ________________ | ________________ |
| Schedule A, period 3: Measured input watts | ________________ | ________________ |
| Schedule A, period 3: Hours per day | ________________ | ________________ |
| Schedule A, period 3: Period low tariff / kWh (or use global rate) | ________________ | ________________ |
| Schedule A, period 3: Period high tariff / kWh (or use global rate) | ________________ | ________________ |
| Schedule B, period 1: Measured input watts | ________________ | ________________ |
| Schedule B, period 1: Hours per day | ________________ | ________________ |
| Schedule B, period 1: Period low tariff / kWh (or use global rate) | ________________ | ________________ |
| Schedule B, period 1: Period high tariff / kWh (or use global rate) | ________________ | ________________ |
| Schedule B, period 2: Measured input watts | ________________ | ________________ |
| Schedule B, period 2: Hours per day | ________________ | ________________ |
| Schedule B, period 2: Period low tariff / kWh (or use global rate) | ________________ | ________________ |
| Schedule B, period 2: Period high tariff / kWh (or use global rate) | ________________ | ________________ |
| Schedule B, period 3: Measured input watts | ________________ | ________________ |
| Schedule B, period 3: Hours per day | ________________ | ________________ |
| Schedule B, period 3: Period low tariff / kWh (or use global rate) | ________________ | ________________ |
| Schedule B, period 3: Period high tariff / kWh (or use global rate) | ________________ | ________________ |
| Equivalent water movement and accessory service confirmed? | ________________ | ________________ |
Copy the period rows for each additional non-overlapping period. Record priming and standby separately for each schedule. Use the same operating days and currency for A and B; document equal water movement and accessory service before claiming a saving.
Mark missing measurements Unknown. Keep exact model, source revision and assumptions with this worksheet. Report a calculation or source correction with reproducible inputs.
The pool pump kWh calculator adds measured input power across your schedule. It gives energy first. It then uses a rate to estimate cost. You do not need a pump purchase price. You do not need to turn horsepower into watts.
Add watts and hours for each measured period without overlapping times. Daily kWh is the sum of watts × hours ÷ 1,000. Keep each power reading and its measurement source with the saved schedule.
Add measured standby use for the off-hours when known. Enter your tariff or use the labelled dated reference range. Unknown standby stays unknown. A fair savings comparison must move equal water and serve the same active devices.
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Pool pump kWh calculator periods
Enter actual electrical watts, not shaft power from an affinity estimate. Record the meter or drive source. Add priming and accessory periods when they are part of pump use. Total running time cannot exceed 24 hours a day.
The optional second schedule uses the same fields. Include its measured flow and accessory windows in your notes. The runtime tool checks water movement separately.
kWh calculator worked example
An artificial schedule uses 1,500 W for 2 hours, plus 300 W for 6 hours. Running energy is 3 + 1.8 = 4.8 kWh/day. Over 30 operating days, that is 144 kWh. At an illustrative 0.20 currency/kWh, running expense is 28.80 currency units.
The example explicitly enters zero standby watts. Your unknown standby is not automatically zero. If a measured standby load is entered, the tool applies it only to hours outside the running periods.
Editable rate assumptions
The initial national reference is labelled with its source and date beside the form. EIA Electric Power Monthly reports 18.31 cents/kWh for US residential electricity in July 2026 and 17.45 cents for July 2025. These are context points rather than a local forecast.
Use your current marginal tariff: the charge for extra energy used. You can attach a time-of-use rate to each period. Demand charges and fixed monthly fees are outside this simple energy sum. Record them separately if they apply.
Operating days are the days this schedule runs. They are not every day of the year by default.
Compare schedules without overclaiming
Each schedule shows daily kWh and the total for your chosen days. It prices that energy at the entered rates. Any gap is a difference between those scenarios. It is not a promised product saving. The electricity-use guide explains how to match service first.
The ENERGY STAR field definitions describe test efficiency. That differs from the measured input used here. The DOE pumping sourcebook explains why power passed to water differs from motor input. This tool does not infer watts from RPM alone.
Save the assumptions
Print the record with power and hours. Keep rates and running days with it. Unknowns stay on the sheet too. A local JSON download records calculation version 1.0.
Browser saving is off until you choose it. Clear it with the saved-data control. No personal details are needed.
FAQ
Can I leave the tariff blank?
You can calculate energy without a personal tariff. A labelled reference rate can price a general scenario. Cost can also stay unknown. The kWh total does not need a money rate. When you use your bill, enter the variable charge for extra energy used.
Does a 30-day result include every month?
It covers the exact day count entered. Months have different lengths. Seasons can have different schedules too. The tool does not turn one day into a yearly forecast without your chosen count. Save seasonal schedules separately when their flow or hours differ.
Once the energy record supports a workable schedule, use the digital pool pump timer comparison if a separate control is needed. Match its motor rating and location to the pump rather than choosing from the calculated kWh alone.
Verdict on pump kWh
Use the pool pump kWh calculator for measured energy and transparent rate scenarios. Confirm circulation with the pool pump size calculator before comparing schedules. For incorrect arithmetic, send inputs and units through contact.