Waymark The Homeowner OS

Appliance lifespan

Water Heater Lifespan Calculator: How Long Do They Last?

Enter the year yours was installed to see how much life is left in your water heater and when to start budgeting for a replacement. Free, no signup.

Your water heater

Expected life for a water heater: about 8 to 12 years.

Life remaining

- years left
Enter the year it was installed to see where it stands.
Current age -
Expected life 8 to 12 yrs
Life used -

Shop supplies

Only what the job actually needs. We link to the stores you already use.

Home Depot Lowe's

Affiliate disclosure: some links above are affiliate links, which means Waymark may earn a small commission if you buy through them, at no extra cost to you. We only recommend supplies relevant to the job.

How long does a water heater last?

A tank water heater lasts about 8 to 12 years. Enter the year yours was installed and this calculator shows how far into that window you are, roughly how many years remain, and when it makes sense to start setting money aside.

Flushing the tank yearly and replacing the anode rod can push a heater to the top of its range. Once you are past 10 years, a proactive replacement beats a cold, flooded morning when the tank finally lets go.

These lifespans are typical ranges for a well-maintained unit. Hard water, heavy use, and skipped maintenance shorten them; regular service extends them. Use the estimate to plan a replacement fund, not as a firm expiration date.

Frequently asked questions

How long does a water heater last?
A conventional tank water heater lasts about 8 to 12 years. Tankless units can last 20 or more. Hard water and skipped maintenance shorten the life, while yearly flushing extends it.
What are the signs a water heater needs replacing?
Rusty or discolored hot water, popping or rumbling from sediment, water pooling around the base, and running out of hot water faster than it used to are all signs the tank is near the end.
Should I replace a water heater before it fails?
Once yours is past about 10 years, a planned replacement is usually smart. A tank that fails can leak dozens of gallons and cause water damage far more expensive than the heater itself.

Related calculators

Sump Pump

Years left on a sump pump, and when to plan.

Water Softener

Years left on a water softener, and when to plan.

Gas Furnace

Years left on a gas furnace, and when to plan.