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Pool Heating Time Calculator

Heat-up hours, therms burned, and session dollars from gallons, heater BTU, and gas price.

Inputs

Inputs and assumptions

Gallons to heat.

Heater output BTU per hour from the nameplate.

Degrees F to raise, e.g. 65 to 82 is 17.

Gas 0.8, heat pump COP handled separately.

Gas price per therm from your bill.

Result

Time to heat (hrs)
15.6
Session cost (USD)
$23.46
Gas used (therms)
15.6
Sizing estimate from label inputs. Confirm gallons, flow, BTU, and efficiency from manuals before buying equipment.

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Guides

01 Pool Heating Cost Guide (2026)

Related articles

01 Pool Build Budget Guide: Costs and Planning for 2026 02 Pool Pump Runtime Guide: Calculate Turnover and Set Your Schedule 03 Pool Heating Cost Guide (2026)

Workspace

Keep the assumptions with the result.

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