Water Heater Installation Cost Calculator

Select the tank size for your household — 40 gallons for 1–2 people, 50 for 3–4, 75+ for large families. Choose the heater type: electric is cheapest upfront, gas recovers faster, tankless gives endless hot water at double the install cost.

Be honest about complexity: a first-time tankless install almost always needs new venting. Pick your region and read the estimate.

The estimate takes the 2026 installed unit cost for the size and type — $1,050 electric / $1,650 gas / $3,200 tankless for a 50-gallon equivalent — adds the complexity adder ($0, $800, or $1,500), then applies the region multiplier. The total splits into the unit and materials (about 55%) and labor (about 45%: disconnect, install, venting, permit, haul-away).

The low–high range reflects published installed bands, not a made-up margin.

Heater type is the biggest lever — tankless costs roughly double a tank swap because of venting and gas line work. Fuel conversions (electric to gas) and relocations add $800–$1,500.

Code upgrades — expansion tanks, drip pans, earthquake straps — are small individually but stack up on older installs.

Installing a 50-gallon gas tank water heater as a straightforward replacement in an average-cost region estimates at $1,650 — about $908 in materials and $742 in labor, with a realistic range of $1,300 to $2,000.