HOW TO USE IT
How to use the Tankless Water Heater Installation Cost Calculator
- 1
Choose the fuel (electric or gas).
- 2
Enter the unit cost and labor.
- 3
Set whether venting and gas line are needed.
- 4
Review the total cost.
THE MATH
Tankless water heater cost formula
Total = unit + labor + venting + gas lineAn electric tankless unit runs ~$1,400 and labor ~$800. Venting adds ~$600 and a gas line ~$800 for a gas model.
PRACTICAL EXAMPLE
Gas, unit $1,400, labor $800, venting and gas line
Total = 1,400 + 800 + 600 + 800 = $3,600.
FAQ
Frequently asked questions
How much does a tankless water heater cost in 2026?
Nationally, $1,400-$5,400 depending on fuel and install.
Electric or gas?
Electric is simple for low demand; gas needs venting and a gas line.
Do I need a pro?
Yes — install and connections need a licensed pro.