How to Measure and Calculate Window Film for Ordering

Step-by-Step Measurement Guide

Step 1: Measure Each Window Pane

Use a tape measure to determine the width and height of the glass — measure from edge to edge of the glass only (inside the window frame, not including the frame itself). Measure in multiple places (top, middle, bottom for width; left, middle, right for height) to account for any irregularities. Record the smallest measurement for both width and height.

Step 2: Add Trim Allowance

Add 1/4 inch (6mm) to each side of both measurements. This extra allowance lets you trim the film to a perfect fit after application. So if your glass measures 36" wide × 60" tall, you would order film cut to 36.5" × 60.5".

Step 3: Choose Your Roll Width

SolarGard window film is available in four roll widths: 36 inches, 48 inches, 60 inches, and 72 inches — in 100-foot and 50-foot rolls. Choose the roll width that is closest to (but not smaller than) your widest window measurement. For windows wider than 72 inches, you will need to install the film in panels.

Step 4: Calculate How Many Linear Feet You Need

For each window, you need a piece of film equal to the window height (plus trim allowance). Add up all window heights to get your total linear feet needed from the roll.

Step 5: Account for Multiple Windows

If you have multiple windows of the same width, you can cut them all from the same roll. Total linear feet = sum of all window heights (with trim allowance) for windows that fit within your chosen roll width.

Roll Size Guide

Special Considerations