🔥 Pool Heater Sizing Calculator

Estimate the heater output (BTU/hr) needed for your pool using a common contractor rule of thumb, based on surface area and desired temperature rise. Consult a pool professional for exact sizing, since wind, cover use, and climate also matter.

Pool surface area (sq ft)

Desired temperature rise (°F)

General estimate only — a pool professional can account for wind, cover use, and climate for precise sizing.