Pool Energy Cost Calculator
Estimate your swimming pool's monthly and annual energy costs by entering your pump, heater, and lighting specifications along with your local electricity rate. This calculator uses industry-standard formulas to give you an accurate picture of your pool's operating expenses so you can make informed decisions about equipment upgrades and run-time schedules.
Electricity Rate
Pool Pump
Pool Heater (Electric / Heat Pump)
Pool Lighting
Formulas Used
Pump Power (kW):
kW = (HP × 0.7457) ÷ (Motor Efficiency ÷ 100)
0.7457 is the exact conversion factor: 1 HP = 745.7 W
Daily Energy (kWh/day):
kWh/day = kW × Run Hours per Day
Monthly Energy (kWh/month):
kWh/month = kWh/day × 30.44 (average days per month)
Annual Energy (kWh/year):
Pump & Lighting: kWh/day × 365
Heater: kWh/day × (Active Months × 30.44)
Energy Cost:
Cost = kWh × Electricity Rate ($/kWh)
Assumptions
- Heater power draw entered should be the electrical draw (kW), not BTU output — for electric resistance heaters this is straightforward; for heat pumps, enter the compressor + fan draw (not the equivalent BTU capacity).