A millimeter (mm) is a unit of measurement in the metric system.
So, how big is 4 mm? We’ll give you some points of reference and convert it to inches so you can get a better grasp of the measurement.
Converting 4 Millimeters to Inches
So, how big is 4 mm in inches? Four millimeters equals about 0.157 inches. If you want to be really precise, 4 mm is equal to 0.157480315 inches.
You can convert millimeters to inches using this formula:
[in] = 4 0.0393700787
Using a calculator will give you the most accurate answer, of course, but you can also do the math yourself using the formula above if you don’t have a calculator handy.
Putting 4 mm into perspective
Four millimeters is tiny. It’s about the thickness of a few credit cards stacked on top of each other.
Here are some things that measure about 4 mm:
- The width of a grain of rice
- The diameter of a small bead
This measurement comes up a lot in engineering, manufacturing, and jewelry design. Knowing about how big it is can help you understand technical specs.
To Conclude
Four millimeters is a small measurement, about 0.157 inches. Knowing how to convert millimeters to inches can be useful in design, manufacturing, and many other fields.
To understand how big 4 mm is, picture something you see every day, like the width of a pencil lead or a few stacked credit cards. That’s about 4 mm!