How much does it cost to heat a pool?

It depends on size, temperature rise, and fuel. Raising 20,000 gallons by 10°F costs only a few dollars by heat pump but more by gas — enter your numbers and price above.

What's the cheapest way to heat a pool?

A heat pump for running cost, plus a solar cover to stop heat loss. Solar panels are cheapest of all once installed.

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Pool Heating Cost Calculator

See what it costs to raise your pool's temperature. Pick your heater type and enter your energy price.

Balance your whole pool at once →Enter all your readings on one screen and get an ordered dosing plan — the full Water Report.

How to use it

Enter your volume and how many degrees to raise the water.
Pick your heater type and your energy price (leave price blank to use a typical default).
Compare types — a heat pump usually costs a fraction of gas or electric resistance.

Gas vs. heat pump vs. electric

Gas heats fast but burns money on big rises. Electric resistance is the most expensive to run. A heat pump is slow but cheapest per degree because it moves heat instead of making it (a COP around 5 means ~5 units of heat per unit of electricity). Whatever you use, a cover is the single biggest cost saver — most heat is lost off the surface.

Frequently asked questions

How much does it cost to heat a pool?: It depends on size, temperature rise, and fuel. Raising 20,000 gallons by 10°F costs only a few dollars by heat pump but more by gas — enter your numbers and price above.
What's the cheapest way to heat a pool?: A heat pump for running cost, plus a solar cover to stop heat loss. Solar panels are cheapest of all once installed.

Related calculators

Built & reviewed by a working pool-service pro. Target ranges follow CDC MAHC, PHTA, and Taylor guidance. Doses are starting estimates — add a little less than the max, re-test, and confirm against your product label. Educational tool, not a substitute for a water test or professional advice.