Is this electricity formula exact?
No. Pump efficiency, speed settings, plumbing, and utility billing can change actual usage.
Last updated September 29, 2026
Pool Electricity Cost Calculator
Estimate pool pump electricity cost using known input watts or a simplified horsepower estimate, operating hours, and your electricity rate.
Quick answer
A pump drawing 600 W for 8 hours per day uses 4.8 kWh/day. At $0.20/kWh, that is $28.80 for 30 operating days or $29.76 for 31 days. These are illustrative entered-power calculations, not measured household bills. Add sequential periods for a variable daily schedule, or use the less precise horsepower mode when input watts are unknown.
Pool electricity cost calculator
Electricity estimate
Enter a schedule and calculate its energy and cost. After any change, calculate again; the previous total is cleared.
Pump energy only. Excludes heaters, taxes, utility fixed fees, demand charges, tiered rates, and equipment changes. Cost planning, not electrical or operating instructions.
Illustrative 30-day horsepower cost scenarios
| Item | Low | Typical | High | Notes |
|---|---|---|---|---|
| 1 HP, 8 hours/day, 30 days, $0.18/kWh | $29.00 | $32.23 | $35.45 | Mechanical-power approximation; low/high vary the calculated cost by 10% only, not accuracy bounds. The calculator reports the entered schedule's single estimate. |
| 1.5 HP, 8 hours/day, 30 days, $0.18/kWh | $43.51 | $48.34 | $53.17 | Mechanical-power approximation; low/high vary the calculated cost by 10% only, not accuracy bounds. The calculator reports the entered schedule's single estimate. |
| 2 HP, 8 hours/day, 30 days, $0.18/kWh | $58.01 | $64.45 | $70.90 | Mechanical-power approximation; low/high vary the calculated cost by 10% only, not accuracy bounds. The calculator reports the entered schedule's single estimate. |
What may be included
- - Pool pump electricity for the entered operating intervals
- - Usage charges at the entered flat electricity rate
What is usually not included
- - Measured pump efficiency or variable-speed curves
- - Other pool equipment or household electricity
- - Utility taxes, demand charges, or tiered billing
- - Electrical setup or operating instructions
How monthly pool pump electricity cost is estimated
Daily energy is watts / 1,000 x hours. Multiple periods add that quantity for every row; the periods must not overlap and must total no more than 24 hours. Multiply by the selected 1-366 operating days and flat USD/kWh rate. A 30-day result is not an exact calendar-month bill; 12 such periods are 360 days, not a calendar year.
What the simplified formula cannot capture
Actual consumption can differ because motor efficiency, variable-speed settings, hydraulic conditions, controls, utility billing, and other connected equipment are not measured by this calculator.
What affects the cost
- - Electrical input watts, or approximate HP
- - Daily schedule and hours
- - Selected operating days
- - Flat electricity rate in USD/kWh
- - Measured input versus unmodeled motor losses
- - Utility billing structure
Compare operating-cost scenarios
Use the estimator to compare budget scenarios with the values shown on your equipment information and electric bill. A qualified professional should evaluate equipment changes or electrical work.
How to use this estimate
- - Use the electricity rate from a recent bill
- - Keep pump electricity separate from heaters and other equipment
- - Compare estimated cost with actual utility usage over time
- - Treat equipment efficiency claims as quote-specific
Methodology for this estimate
Daily kWh = sum(watts / 1,000 x hours per day); period kWh = daily kWh x selected days; period cost = period kWh x USD/kWh. HP mode substitutes HP x 0.746 for kilowatts, without motor losses: mechanical output is not measured electrical input. No RPM-to-watts curve is assumed. Days must be integers from 1 to 366, numbers finite and nonnegative, and hours no more than 24 in total. Empty or invalid inputs are rejected, not clamped. Intermediate calculations are not rounded; money displays two decimals. No annual estimate is inferred.
- For service and supplies outside pump energy, use the Pool maintenance cost calculator.
Energy units and estimate limits
The energy calculation uses entered power, time, and utility rates. The U.S. Energy Information Administration defines a kilowatt-hour as 1,000 watts used for one hour. Where low/high are shown, they are illustrative sensitivity scenarios, not measured error bounds.
Important disclaimer: Estimates are for planning only and are not contractor quotes. Pool Cost Planner does not provide chemical handling, mixing, dosing, electrical, gas, structural, or repair instructions. For safety issues, code questions, repairs, or winterizing in freezing climates, contact a qualified pool professional.
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FAQ
Where should I find my electricity rate?
Use the average price per kWh from your electric bill for a practical planning estimate.
Does this include a pool heater?
No. It estimates pump electricity only. Heater fuel or electricity and other equipment should be budgeted separately.
Why does actual pump cost differ from the estimate?
Motor efficiency, variable speed, controls, hydraulic conditions, billing tiers, and actual runtime can change measured use.