Ohio Water Heater Size & Cost Calculator
Size a new water heater for your household and see a typical installed price for tank or tankless.
Your estimate
0 gallons
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Typical installed cost: —
Price ranges come from HomeAdvisor / Angi cost guides, Fixr cost guides, NerdWallet home improvement costs, adjusted for Ohio and the Midwest (last reviewed October 2026). They are for planning only; your actual quote depends on your home and local pricing.
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How to use this calculator
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How we size it
Tank size follows first-hour demand: about 11 gallons per person, rounded up to standard 30, 40, 50, 65 and 80-gallon tanks, with a bump for extra bathrooms. Tankless sizing uses peak flow: roughly 2.5 gallons per minute per shower plus 1.5 for a faucet or appliance running alongside, at Ohio's typical 70°F winter temperature rise.
Frequently asked questions
What size water heater do I need for a family of four?
Most four-person homes do well with a 50-gallon tank, or a tankless unit rated for about 7 to 9 gallons per minute in Ohio's cold groundwater.
Is tankless worth it in Ohio?
Tankless units cost more up front but last longer (20+ years) and never run out of hot water. Cold winter groundwater means you need a higher-capacity unit than in southern states.
How long does a tank water heater last?
Typically 8 to 12 years. If yours is past 10 years and leaking, rusting or making popping noises, plan a replacement.
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