Pool Pump Energy Cost Calculator
Example: Pump motor size: 1.5 HP · Run hours per day: 8 hrs · Months running per year: 6 months · Electricity rate: 0.17 $/kWh
| Annual pump running cost | $278 |
| Electricity used per year | 1,632.84 |
| Cost per running month | $46 |
Worked example
A 1.5-HP pool pump draws about 1.12 kW. Run 8 hours a day for six months (about 182 days) it uses roughly 1,630 kWh, costing about $277 a year at $0.17 per kWh, or about $46 for each month it runs. Cutting the run time to the 4 to 6 hours most pools actually need, or switching to a variable-speed pump, can slash that figure by half or more.
Frequently asked questions
Why does a pool pump cost so much to run?
It combines a sizable motor with very long daily run times across the season, so the kilowatt-hours pile up. Many pools are set to run far longer than needed out of habit. Because the cost scales directly with hours, trimming the schedule is the fastest way to lower the number this tool shows.
How long should my pump really run?
Most residential pools only need enough circulation to turn over the water once or twice a day, which is often 4 to 6 hours, not the 8 to 12 many timers are set to. Reducing run time to the minimum that keeps the water clear directly cuts the annual cost here.
Is a variable-speed pump worth it?
Often yes. Variable-speed pumps run longer at much lower speeds, and because power rises steeply with speed, they can use 50 to 70% less energy than a single-speed pump. Many utilities offer rebates on them, and the annual figure here shows how quickly that efficiency pays back.
Does horsepower directly set the cost?
Larger motors draw more power, so a 2-HP pump costs more per hour than a 1-HP one. But total cost depends just as much on run hours. A right-sized pump on a lean schedule usually beats an oversized pump run out of habit.