Water Heater Replacement Cost Calculator
Get an instant estimate for replacing your water heater with a tank or tankless system.
Water heater replacement typically costs between $1,200 and $3,500. Gas tank units are common and affordable, while tankless systems are more expensive upfront but offer long-term savings.
Calculate Your Estimate
Project Location
Choose which state the project is located.
Heater Details
Select the fuel type and capacity required.
Fuel & Type
Capacity / Usage
Unit Location
Add-ons & Code Upgrades:
Why Use Our Water Heater Calculator?
Pricing varies by fuel type (gas/electric), tank size, and installation complexity. Our calculator accounts for these factors, including potential code upgrades like expansion tanks and earthquake strapping, to give you a realistic budget.
Manually Calculating Water Heater Replacement Costs
To estimate manually:
- Unit Cost: Check hardware store prices. A 50-gallon gas tank is ~$600-$900. Tankless is $1,200+.
- Labor: Plumbers charge $500-$1,000 for a standard swap. Complex locations (attic) cost more.
- Parts: Expansion tank, flex lines, gas sed trap, and new valves add ~$200-$400.
- Code Upgrades: Venting changes or earthquake straps may be required by local code.
Manual Calculation Formula:
Est. Cost = (Heater Price) + (Labor: 4hrs × $100) + (Parts ~$300) + (Permit ~$150)
*Example: Heater ($800) + Labor ($600) + Parts ($300) = ~$1,700 Total.
Frequently Asked Questions
How much does water heater replacement cost?
A standard tank replacement costs $1,200-$2,500. Tankless systems range from $3,000 to $5,000+.
Tank vs. Tankless: Which is better?
Tankless offers endless hot water and efficiency but has a higher upfront cost. Tanks are cheaper but can run out of hot water.
How long does installation take?
Standard swaps take 2-4 hours. Tankless conversions may take a full day due to gas/venting upgrades.
What size do I need?
2 people: 40 gallon. 3-4 people: 50 gallon. 5+ people: 75 gallon or tankless.
Do I need a permit?
Most cities require a permit for water heater replacement to ensure safety (gas lines, venting).
How long do water heaters last?
Tank heaters last 8-12 years. Tankless units can last 20+ years with maintenance.