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Water Heater Size Calculator

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Water Heater Size Calculator

Find the right tank size from your household’s real usage. Results stay hidden until you submit.

👨‍👩‍👧 Household size 3

🚿 Showers per day 3

🧺 Laundry loads / week 4

🍽 Dishwasher runs / week 5

🌡 Climate

🛀 Peak simultaneous demand?

Your recommendation

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Estimates only — not a guarantee. Consult a licensed installer for sizing.

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Affiliate disclosure: As an Amazon Associate, we earn from qualifying purchases. Editorial recommendations are independent and based on our methodology. Energy-savings figures are estimates, not guarantees, and actual results vary by climate, household, utility rates, and installation.

© 2026 Heat Pump Reviews Site. All rights reserved. Not professional installation advice. Consult a qualified HVAC professional for sizing and installation.

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