mm to inches calculator

mm to inches calculator Tool

Struggling with millimeters and just need to understand the length in inches? Whether you’re dealing with automotive parts, the length of various oddly named scandanavian furniture, or something else – we know the struggle. That’s why we built this lightning fast millimeters to inches calculator. To use it – simple input your millimeters and we spit out how many inches that you’ll be able to see. To make it even better, we added the ability to put your fractions of an inch with different levels of precision, to be able to accomodae whatever you want to throw at it! If you like this one – you’ll love the rest of our unit conversion tools . Give them a try, today!

MM to Inches Calculator – Summary and Overview


When it comes to measurement, millimeters (mm) and inches are universally recognized units. In the realm of science, arts, design, construction, and even in everyday mundane activities, we inevitably encounter situations where such measurements are indispensable. In fact, the correlation between mm and inches and the ability to convert between has significant benefits and applications.

Quick Summary

  • The article delves into the history surrounding the use of millimeters and inches for measurement.
  • It also explores the connection between these two universally recognized units.
  • We will discuss the relevance of understanding these measurements in our daily life.
  • Reasons why we often convert millimeters to inches are also illustrated.
  • The article ends with some interesting trivia about measurements.

History of Measuring Millimeters

The millimeter is a unit of length in the metric system, equivalent to one thousandth of a meter. The metric system which was established during the French Revolution, was designed to be a universal system of measurement. Millimeters became popular because of their accuracy – especially useful in scientific and engineering disciplines.

History of Measuring Inches

The inch has a more diverse history. The earliest known reference of the inch dates back to England in the seventh century. It was originally based on the breadth of a human thumb, which across different societies varied from 1/12th to 1/16th of a foot. Today, the inch is officially defined as 25.4 millimeters.

The Link Between Millimeters and Inches

Though the metric and imperial systems might seem incompatible, one inch is internationally accepted to equate to exactly 25.4 millimeters. It’s this uniformity that allows for precise conversion between these units, making it possible for the two systems to coexist and be mutually intelligible.

Millimeters and Inches in Everyday Life

The importance of knowing how to gauge millimeters and inches can’t be overstressed. This knowledge comes in handy from tasks as simple as reading a ruler to more complex activities like interpreting scale drawings or plans in architecture and design.

Common Reasons to Converting Millimeters to Inches

There are various circumstances where converting millimeters to inches can be necessary:

  • Engineering & Design: Technical plans often use millimeters for precision, but an American audience may require the dimensions in inches.
  • Shopping: Product sizes in international online markets may be given in millimeters.
  • Travel: Understanding local road signs and maps

Do you know?

  • The Guinness World Record for the largest tape measure extends to a baffling 600 meters – or 23622.05 inches!
  • The smallest things ever measured were the wavelengths of light – some measured in nanometers, 1 million times smaller than a millimeter.
  • An inch was originally defined as the width of a man?s thumb at the base of the nail, a measurement that dates back to the ancient civilizations of the Egyptians and the Romans.

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    Here’s a tidbit. We include stats and interesting facts alongside of each of our calculators. These may be helpful to you along your way and provide you an insight and link to a resource to help you on your way.


    Chose not to be boring. We’ve found that a lot of our competitors (yes, there are online calculator competitors, can you believe the world we live in) have very BORING websites. We’re not trying to be boring. We want you to have a chuckle.