Pool Pump Energy Cost Calculator

What it costs to run your pool pump — per day, month & year

running cost
watts

From the motor nameplate, or amps × volts. No watts? Use the HP helper below.

h/day
$

per kWh

days

Horsepower → watts helper (optional)

HP
%

Enter HP to estimate watts (watts = HP × 746 ÷ efficiency) — it drives the math below.

Cost per month
to run your pump
$0.00
Running fewer hours or upgrading to a variable-speed pump is the biggest lever on this bill — a variable-speed pump moves the same water at a fraction of the wattage. See the exact payback with the Variable-Speed Pump Savings Calculator.
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Pool Pump Energy Cost Calculator — guide & how to use

The pool-service workflow

Service a pool in order: Volume → Alkalinity → pH → Calcium → Stabilizer → Chlorine → Salt → Heating → Pump cost → Price it → Checklist · All pool tools · Balancing guide

What it does

This calculator estimates the electricity cost to run your pool pump using your own power draw, runtime, and electric rate. The math is straightforward: kWh per day = (pump watts ÷ 1000) × hours run per day. Cost per day = kWh per day × your rate per kWh. From there, cost per month = cost per day × days per month (default 30) and cost per year = cost per day × 365. If you only know the pump's horsepower, the helper converts it with watts = HP × 746 ÷ efficiency (default 85%). Finally, it estimates how much a variable-speed pump could save you — about 65% of your current yearly running cost.

How to use it

  1. Enter your pump's watts (from the nameplate, or amps × volts), or use the HP helper to estimate it.
  2. Enter the hours per day the pump runs and your electric rate in $/kWh.
  3. Adjust days per month if you want something other than 30.
  4. Read the cost per month at the top and see day / month / year plus variable-speed savings in the breakdown.

Frequently asked questions

How do you calculate the cost to run a pool pump?

First find energy use: kWh per day = (pump watts ÷ 1000) × hours run per day. Then cost per day = kWh per day × your electric rate per kWh. Cost per month = cost per day × days per month (default 30), and cost per year = cost per day × 365.

How do I convert pump horsepower to watts?

Use watts = HP × 746 ÷ motor efficiency. A 1 HP motor at 85% efficiency draws about 878 watts. Always prefer the nameplate watts or amps × volts if you have them — HP is the output rating, not the electricity the motor pulls.

How much can a variable-speed pool pump save?

Running at lower speeds for more hours moves the same water using far less power. Variable-speed pumps commonly cut pump energy by around 65%, so this tool estimates your yearly savings as 65% of your current yearly running cost.

Is the pool pump cost calculator free?

Yes — 100% free, calculated in your browser.

Related tools

Pool Heating Cost Calculator · Pool Service Pricing Calculator · Pool Maintenance Checklist

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