# Tankless Resources | Total Tankless

> Free tools and calculators to help you size, plan, and save on your tankless water heater installation. Interactive calculators and rebate finders built by tankless specialists.

URL: https://totaltankless.com/resources/

Resources

# The Right Numbers Before You Commit

Free tools and calculators built by tankless specialists. Size your unit, estimate ROI, and find rebates before any sales call.

New

## Tankless Sizing Calculator (GPM)

Find the right tankless GPM rating based on your home's simultaneous hot-water demand and climate.

Open Tool

[Tankless Sizing Calculator (GPM) →](/resources/tankless-sizing-calculator/)

 

New

## Tank vs Tankless ROI Calculator

Estimate how long a tankless upgrade takes to pay back vs replacing your current tank water heater.

Open Tool

[Tank vs Tankless ROI Calculator →](/resources/tank-vs-tankless-roi-calculator/)

 

New

## Rebate Finder

Enter your state and zip code to find available federal tax credits, utility rebates, and local incentives for your tankless water heater installation.

Coming Soon

[Rebate Finder →](#)