Being able to measure a cardboard box can be useful in multiple scenarios, whether you’re an online seller who needs reliable forms of packaging to ensure your items get to your customer safe and sound, or just someone who is looking for secure storage, making sure your box is big enough, or in fact small enough is essential. Here’s a straightforward guide to help you measure a cardboard box. 

Understanding Box Dimensions

First, it’s crucial to understand that when we talk about the dimensions of a cardboard box, we’re referring to its length, width, and height. These dimensions are typically listed in that order: L x W x H.

Length (L): The longest side of the box when looking at the top opening.

Width (W): The shorter side of the box when looking at the top opening.

Height (H): The distance between the top and bottom of the box when it’s standing upright.

In terms of the unit of measurement, we usually measure in millimetres (mm), although we can also work in inches (in/”).

Tools You’ll Need

To measure a box, you need a measuring tool. A tape measure is ideal because its flexibility allows for easy measurement of boxes of all sizes. For smaller boxes, a ruler can work just fine.

Tape Measure

Essential Steps to Measure A Cardboard Box

Prepare the Box: We recommend assembling the box before measuring. This is simply due to the box being easier to measure once made up. Make sure all flaps are securely folded and sealed to get accurate measurements.

Measure the Length:

  • Place the box on a flat surface with one of its longer sides facing you.
  • Use a ruler or tape measure to measure the length from one end of the box to the other. Make sure to place the measuring tool parallel to the longest sides of the box.

Measure the Width:

  • Turn the box 90 degrees so that one of its shorter sides is now facing you.
  • Again, use the ruler or tape measure to measure the width from one side of the box to the other. Ensure the measuring tool is placed parallel to the shorter sides of the box.

Measure the Height:

  • Stand the box upright so that one of its open ends is facing upwards.
  • Use the ruler or tape measure to measure the height from the bottom of the box to the top, keeping the measuring tool perpendicular to the base.

Record the Dimensions: Write down your measurements in the order of Length x Width x Height. Whether you write it down as a note on your phone, or use a permanent marker to write it on the box itself, making a reference of the size will save you time in the future.

Image of Cardboard Box

Wrapping Up

Knowing how to measure a cardboard box accurately is a skill that comes in handy more often than most realise, whether for personal or professional reasons. With this simple guide, you’re well on your way to mastering the art of measuring cardboard boxes.