Estimate the monthly cost to heat your pool based on its size and desired temperature increase.
Heating water takes a predictable amount of energy based on its volume and how many degrees you're raising the temperature, then adjusted for your heater's efficiency and local fuel cost.
BTUs Required = Gallons × 8.34 × Temperature Rise (°F), then divided by heater efficiency and converted to fuel cost.
A 20,000-gallon pool needing a 10°F rise takes about 1.67 million BTUs, translating to a rough one-time heating cost depending on your fuel type and rate.
It calculates the energy needed to raise pool water to a target temperature and maintain it, then multiplies by your energy source's cost per unit.
Most pool heat loss happens through evaporation from the surface; a cover dramatically cuts this, often reducing heating costs substantially.
Yes — colder ambient temperatures and more wind increase heat loss, requiring more energy to maintain the same water temperature.