To measure millimeters, you can use several tools, but the most common ones are a ruler, caliper, and a tape measure. Each tool has its own advantages depending on the precision required and the context of the measurement.
A ruler is often the simplest tool to use. Standard rulers typically have millimeter markings alongside centimeters. This makes it easy to measure small distances accurately, such as the thickness of a piece of paper or the dimensions of a small object.
For more precision, especially in mechanical or engineering contexts, a caliper is a better choice. Calipers can measure external and internal dimensions, as well as depths, with much greater accuracy than a ruler. Many calipers also have a digital display for easy reading.
If you’re working on larger projects or need to measure longer distances, a tape measure with millimeter markings can be very useful. Tape measures can extend over greater lengths while still providing the precision needed for small measurements.
Ultimately, the tool you choose depends on the level of accuracy you need and the items you’re measuring.