Measuring for Drawer Slides: A Comprehensive Guide
Installing new drawer slides can significantly improve the functionality and lifespan of your furniture. However, accurate measurement is crucial to ensure a perfect fit. This guide will walk you through the process of measuring for drawer slides, step by step.
Understanding Drawer Slide Sizes
Before we dive into the measurement process, it's essential to understand the different sizes of drawer slides. Drawer slides are typically measured in three ways:
- Overall Length: The total length of the slide, including the extension.
- Side Mounting Width: The width of the mounting bracket that attaches to the side of the drawer.
- Center-to-Center (CTC) Measurement: The distance between the centers of the two mounting holes on the slide.
Gathering Your Tools
Before you start measuring, make sure you have the following tools on hand:

- A tape measure
- A pencil
- A piece of paper to record your measurements
- An existing drawer slide (if you're replacing old slides)
Measuring the Drawer
Start by measuring the inside of the drawer where the slides will be installed. Here's how:
- Measure the width of the drawer from side to side. This will help you determine the side mounting width of the slide.
- Measure the depth of the drawer from front to back. This will help you determine the overall length of the slide.
- Measure the height of the drawer from top to bottom. This will help you determine the height of the slide.
Measuring the Cabinet Opening
Next, measure the opening in the cabinet where the drawer will be installed. Here's how:
- Measure the width of the opening from side to side.
- Measure the depth of the opening from front to back. This measurement should be slightly less than the overall length of the slide to allow for the drawer to extend fully.
- Measure the height of the opening from top to bottom. This measurement should be slightly less than the height of the slide to allow for the drawer to sit properly in the opening.
Choosing the Right Drawer Slide
With your measurements in hand, you can now choose the right drawer slide. Most drawer slides are adjustable, so you'll want to choose a slide that can accommodate the width and depth of your drawer and cabinet opening. The height of the slide should match the height of your drawer.

Installing the Drawer Slide
Once you've chosen the right drawer slide, it's time to install it. The process will vary depending on the type of slide you've chosen, so be sure to follow the manufacturer's instructions. However, here are some general steps:
- Mark the mounting holes on the side of the drawer and the inside of the cabinet opening.
- Drill pilot holes at the marked spots.
- Attach the slide to the drawer and the cabinet using screws.
- Test the drawer to ensure it slides smoothly and fits properly.