United States • dedicated calculator
Pool Heater Size and Heating Time Calculator
Estimate pool-heater BTU/h, heat-up time and energy cost from pool volume, temperature rise, heat loss and fuel efficiency.
Specific inputs
live visual
transparent result
live visual
transparent result
1. EnterCalculator-specific values
2. ReviewUnits and assumptions
3. CalculateDedicated formula engine
4. VerifyResult, visual and guidance
Calculator inputs
Pool Heater Size and Heating Time Calculator results
How the calculation works
BTU = gallons × 8.34 × temperature rise, adjusted for heat loss and heater efficiency.
What to verify
Wind, evaporation, covers, plumbing and heater cycling strongly affect real heat-up time.
How accurate is this calculator?
It is a transparent planning calculation based on the entered values and stated assumptions. Verify inputs and obtain professional or supplier confirmation where the decision is consequential.
Does it use U.S. defaults?
Yes. U.S. units, terminology, pricing conventions and rules are the primary defaults where location matters.
Is data sent to a server?
No. The calculation runs locally in the browser and does not send entered values to a remote calculation service.