Pool Heating Cost Calculator
Monthly cost to heat a swimming pool.
Enter your values
ⓘ Live results
Results
- Estimated monthly heating cost
- $219.69
- Total BTUs needed
- 15,012k BTU
- Fuel type
- Natural gas
Quick answer
Pool heating cost is based on BTUs needed to raise pool temperature, divided by heater efficiency and multiplied by fuel price.
cost = (pool gallons x 8.34 x temp rise x days) / heater efficiency x fuel cost per BTU
How to use the Pool Heating Cost Calculator
- 1Enter your pool's volume in gallons and how many degrees of heat you need to add or maintain daily.
- 2Choose your heater's fuel type — gas, electric heat pump or propane each have very different running costs.
- 3See the estimated monthly cost based on typical fuel prices and heater efficiency.
Worked example
Using the values the calculator loads with:
Inputs
- Pool volume20000 gal
- Degrees to raise/maintain daily loss3 °F
- Heater fuel typeNatural gas ($1.20/therm, 82% eff)
- Days per month heating30
Results
- Estimated monthly heating cost$219.69
- Total BTUs needed15,012k BTU
- Fuel typeNatural gas
Frequently asked questions
Which is cheapest to run — gas or heat pump?
Electric heat pumps are usually cheapest to run long-term but heat slower; gas heats fast but costs more per BTU.
Does a pool cover reduce cost?
Yes significantly — a solar or thermal cover can cut heat loss and heating costs by 50-70%.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.