How to Measure for Replacement Windows

If you’re considering replacement windows for your home, measuring your products is a good starting point. If you decide to shop in-store at a local Pella showroom, having a size estimate will prepare you for your conversation with a professional and can help as you begin shopping for new windows. And if you’re shopping online, taking an accurate measurement is important so you have the right fit for your home.

Getting the measurements of your windows or doors is a good first step in the replacement process. You can record your replacement window measurements in one place, so you are prepared to meet with a Pella professional. Before you start, feel free to review the parts of a window to learn exactly what parts are referenced below. If you’re ready to measure your windows, download our replacement window measurement worksheet. Follow these easy steps to measure for your tailor-made replacement windows.

When it comes to measuring your windows for replacement, the three most important things to remember are to measure the width of the product, the product height and then to write both of those measurements down. Certain products need to be measured differently, so product-specific measuring instructions are below. Follow these instructions to get the most accurate dimensions.

1. Measure the width of your awning or casement window at the center. Extend your tape measure horizontally from trim to trim.
2. Measure the height of your casement or awning window. Extend your tape measure vertically from trim to trim.
3. Double check all measurements and make sure to capture both the width and height measurements of your casement or awning window.

1. Measure the width of your single- or double-hung window from trim to trim in the middle. On a sliding window, measure from trim to trim at the center.
2. Measure the height of your double- or single-hung window. On a sliding window, measure the height in the middle. Extend your tape measure vertically from trim to trim.
3. Double check all measurements and make sure to capture both the width and height measurements of your sliding, single- or double-hung window.

1. Measure the width of each window panel in the bay or bow window at the center. Make sure to note the width of the center window separately, as it may be different than the others. Extend your tape measure horizontally from jamb to jamb or trim to trim.
2. Double check all measurements and make sure to capture both the width and height measurements of your bay and bow window.
3. Measure the height of your bay or bow window at the center. Extend your tape measure vertically from trim to trim.
   

Having this information will provide a foundation as you start to look at the cost of various types of products and set your project budget. The necessary frame and window size may be slightly different than your measurement. But don't worry, a certified Pella professional will confirm measurements and conduct an installation inspection of your home before Pella starts to build your products.