Pool Heating Calculator
Calculate heating time, BTU requirements, and energy costs
Calculate Time to Heat
Heater Types Compared
Natural Gas
Fast heating, lower operating cost than electric. Requires gas line.
Electric Resistance
Simple to install, but expensive to operate. Best for spas.
Heat Pump
Most energy-efficient. Works like AC in reverse. Best for maintaining temp.
Solar
Free operating cost after installation. Depends on sunlight availability.
Efficiency Factors
- • Gas heaters: ~82% efficient
- • Electric heaters: ~95% efficient
- • Heat pumps: 300-400% efficient (COP 3-4)
- • Solar: 100% efficient when sun is shining
- • Always oversize slightly for cloudy days
Heating Tips
- • Use a solar blanket to retain heat (saves 50-70%)
- • Heat during warmer parts of the day
- • Keep water chemistry balanced for efficiency
- • Consider a windbreak in windy areas
- • Heat pumps work best above 50°F air temp
Next step
You know the time and energy — now see what it actually costs per season.