Window Size and Opening Planner
Free window tool

Window Size and Opening Planner

Enter your opening width and height to see the nearest standard size, the glass area and whether it can work as an egress window.

These tools give planning-level estimates from typical values and the details you enter. They are not quotes or engineering or safety advice, and results depend on your actual windows, their condition, products and local rules. Only a visit can confirm what a project needs, and we give you a written estimate before anything is ordered.

How it works

Four quick steps.

  1. 01

    Pick a starting point

    Each preset loads typical sizes for a window type.

  2. 02

    Enter your measurements

    Width, height and sill height in inches.

  3. 03

    Say the type and room

    Window type, room and replacement method.

  4. 04

    Read the check

    See the nearest standard size, an escape-opening estimate and measuring tips.

Tips

  • Measure the opening at several points and use the smallest numbers.
  • Bedrooms and some basement rooms may need an escape opening, so check your local code.
  • We measure and confirm before anything is ordered.
Questions

About this tool.

Is this exact?

No. Makers publish exact sizes for each window. It is a planning check.

What if my opening is not standard?

We order a custom-size window to your measurements.

Does it replace a code check?

No. Egress rules vary by building and location, so confirm with your local code office.

Free Estimate

Ready for windows that work and look right?

Call us and describe your project. We will measure, look at your windows and give you a clear written estimate.

Call NowFree Estimate