Water Heater Size Calculator
Find the right water heater size for your household based on usage patterns and family size.
14.2Kuses
7.9/10(344)
Tank Size
65 gal
Peak Hour Demand
78 gal
Daily Usage
99 gal
Temp Rise
65F
Gas Cost/Year
$235
Electric Cost/Year
$688
Water Heater Sizing
Size water heaters by First Hour Rating (FHR) for tank models or GPM for tankless. A family of 4 typically needs a 50-gallon gas or 65-gallon electric tank.
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Disclaimer: This tool is provided as-is for informational and educational purposes only.