Pool Heater Sizing Calculator
Size a pool heater based on pool volume, temperature rise, surface area, and wind exposure using BTU calculations.
Inputs
gal
°F
°F
sq ft
Results
Recommended Heater Size
100,000 BTU/hr
Total BTU Required2,124,150 BTU
Initial Heat-Up Time21.2 hrs
Est. Monthly Operating Cost$132
How to Use This Calculator
- Enter your pool volume in gallons — use the Pool Volume Calculator if you don't have this figure.
- Set the current water temperature and your desired temperature in °F to calculate the required heat rise.
- Enter the pool surface area in square feet (length × width for rectangular pools).
- Set wind exposure: 0 = sheltered/covered, 1 = normal open yard, 2 = very exposed/elevated location.
- Review Required BTU and Heater Size to select a gas, heat-pump, or solar heater model.
- Check Initial Heat-Up Time and Monthly Operating Cost to compare heater types and plan energy costs.
Ad Placeholder
Related Calculators
Pool Volume Calculator
Calculate pool water volume in gallons for rectangular, round, and oval pools based on dimensions and depth.
Hot Tub Operating Cost Calculator
Calculate monthly and annual hot tub operating costs based on heating loss, pump usage, and electricity rates.
Pool Pump Sizing Calculator
Size a pool pump based on turnover rate, pipe friction loss, and total dynamic head with energy cost estimates.
Ad Placeholder