How to Measure Your Windows for Blinds and Window Coverings

How to measure window treatments like the pros

Tip: Our blind sizes include EVERYTHING. That means the entire blind including head-rails, brackets, screws. Everything. Measuring an existing blind and expecting us to make it the same is not a good idea. Measure the window opening. Not the old blind.

Tip:  Add overlap if you are going outside the window. We do not know how much you might need extra to make the proper overlaps. Call if you have questions.

Have you ever been a little nervous about measuring for window blinds or shades? Here are some tips from the pros and an almost surefire way to be sure you don't make any mistakes.

First, organize your measures on a measurement worksheet. They are designed to keep all your measurements in an organized pattern. This makes selection, ordering, and installation much easier.

The biggest mistake to avoid is the order which you state the width and height. With all windows and doors, the width is always first and height second. Window treatments are always stated in inches, not feet and inches. Blind measurements are always done to 1/8th of an inch and not to 16ths. When measuring for an inside mounted blind or shade, round down to the nearest 1/8 and for outside mounts, round up.

The second big mistake to avoid is assuming all your windows are the same size. Always measure every window opening and never order blinds off the measurements of old blinds that may have been already installed.

There is a standard pattern used by most window professionals and it is very simple and easy to follow. It's a simple clockwise pattern. When standing at the front door facing inside the house start with the room that is immediately on your left. Let's say it is your living room and there are 3 windows there. Measure the first one on your left and use a simple code like LV 1 for the first window in the living room, LV2 for the second and so on around the room. If you put this code on "window location" on the order form, we will label that on each blind. When the blinds are being installed, the tags let you know right away where each blind goes. Next, move clockwise and do the same for the next room. Keep the same pattern up for the entire floor then do each floor the same way.

For a surefire, almost "never make a mistake" secret. This requires two people. Begin with one person measuring and reading the tape to the second person that writes the room tag and measurements down on the work sheet. Always use a metal tape measure. After you finish measuring each window, trade places. The person that measured the first time now checks what was written and the first person writing now runs the tape measure and reads the measurements to the checker. If you find any differences check them again to be sure you are right.

Shades Shutters Blinds Measuring Cheat Sheet

Click Here For Measuring Videos

Scroll Down to see actual pictures

What You Need:

  1. Metal Tape Measure
  2. Pencil or pen
  3. Paper to write on

1. When measuring for blinds, always go width first and length second.

2. Do you want to hang the blind on the inside of the window or
outside the window?

For Blinds Inside (inside the drywall or frame) the Window (inside mount)

Order this if the blind is going inside (into) a window opening. The factory takes deductions for 1/8" up to 1" (or more) depending on the product. You can find the specific specification for that product on the product page under the specifications tab. This is used so you do not need to think about the deductions necessary to put the blind in, install the brackets, etc. Basically, if your blind is going to fit inside an opening, just measure the window opening only and select "inside the window" and the factory will make appropriate deductions for that product. Actual product deductions can be viewed on the specifications link on that product page.

Width 1st, Length 2nd.

Please note, on inside the window measurements, the factory takes deductions in order to fit inside that window opening. For the width (always do width first) measure the top, middle and bottom and go with the narrowest measurement (we don't want these sticking to the sides). We do these in 1/8ths so round down if it happens to be slightly over. Do the exact same for the height but go with the longest measurement (we don't want the hanging off the sill do we?). Please call if you have questions.

inside mount diagram

Inside the window Pictures (Click Picture to Enlarge)

For Blinds Outside (over the drywall or frame) the Window (outside mount)

Width 1st, Length 2nd

Please note, on outside the window measurements, the factory takes no deductions in order to fit that window opening. We make the ENTIRE blind the size you request so think about any overlap you might need. Typically if it is a horizontal blind (one that goes up and down), 3-4 inches to the width and 3-4 inches to the height is a good rule of thumb to add to your measurements. For vertical blinds (ones that go side to side), 7 inches to the width and 3 inches to the height  added to the opening measurement is typical. Remember though, these are custom so you can make any size you wish. Again, please call if you have questions.

outside mount

Outside the window Pictures (Click Picture to Enlarge)

Shades Shutters Blinds Measure Cheat Sheet

Click Here For Measuring Videos