How many inches are there in a millimeter? Use this online tool to quickly convert from millimeters to inches (mm to in) and vice versa.
How Many Inches in a Millimeter?
One millimeter is approximately equal to 3/64 inch or 0.0393701 inches. However, the conversion factor that yields more precise results is 1 millimeter = 0.0393700787 inches.
To successfully convert any specified number of millimeters to inches, simply multiply the former by the conversion factor to determine the equivalent length or distance in inches.
Similarly, converting inches to millimeters is also possible by performing the reverse of the above mathematical procedure. Divide the provided number of inches by the conversion factor to get the equivalent length or distance in millimeters.
Difference Between Millimeters and Inches
The main distinctions between millimeters and inches are the units of length that they represent, their intended uses and applications, the measurement systems they belong to, and their respective conversion factor.
| Characteristics | Millimeters (mm) | Inches (in) |
|---|---|---|
| Unit of Length | The millimeter is considered the smallest metric length on a ruler, meter stick, and measuring tape. Its prefix is derived from the Latin word, mille, which means one thousand. As such, the millimeter is one-thousandth of a meter. | The inch is a customary measurement of length which was originally derived from the Roman measurement uncia which means twelfth. It is roughly equivalent to the length of the thumb tip up to the top knuckle of the thumb. |
| Uses and Applications | Used to measure lengths and distances that are small or narrow but still observable by the naked eye | Used to measure relatively small objects such as clothing sizes, height, household items, and appliance dimensions |
| Measurement System | It is a part of the International System of Units (SI) which was adopted since 1960 by nearly every country in the world | It is a part of the Imperial or British system of measurement that is still being used in the US, the UK, and in Commonwealth nations |
| Conversion Factor | 1 millimeter is roughly equal to 0.0393700787 inches | 1 inch is exactly equal to 25.4 millimeters |
How to Convert Millimeters to Inches?
The conversion factor 1 millimeter = 0.0393700787 inches can be used to convert various measuring units into their comparable values efficiently. Here is the detailed process:
Formula:
Inches = Millimeters x 0.0393700787
Task:
Convert 999 millimeters to inches
Calculation:
Number of Inches = 999 x 0.0393700787 = 39.330708661 inches
Therefore, 999 millimeters is approximately equal to 39.330708661 inches.
Millimeters to Inches (mm to in) Conversion Table
To convert millimeters to inches for the following ranges and intervals, use the table below:
| Millimeters (mm) | Inches (in) |
|---|---|
| 1 | 0.03937 |
| 2 | 0.07874 |
| 3 | 0.11811 |
| 4 | 0.15748 |
| 5 | 0.19685 |
| 6 | 0.23622 |
| 7 | 0.2756 |
| 8 | 0.315 |
| 9 | 0.3544 |
| 10 | 0.3937 |
| 20 | 0.7874 |
| 30 | 1.181 |
| 40 | 1.5745 |
| 50 | 1.968 |
| 60 | 2.362 |
| 70 | 2.756 |
| 80 | 3.15 |
| 90 | 3.544 |
| 100 | 3.937 |
| 200 | 7.874 |
| 300 | 11.81 |
| 400 | 15.745 |
| 500 | 19.68 |
| 600 | 23.62 |
| 700 | 27.56 |
| 800 | 31.5 |
| 900 | 35.44 |
| 1000 | 39.37 |
Keep in mind that the numbers in the table’s inches column are rounded to the closest five decimal places. The conversion factor used will determine how accurate the millimeters to inches conversion is, thus resulting figures may vary significantly.
References
https://www.splashlearn.com/math-vocabulary/measurements/inch
https://www.techtarget.com/whatis/definition/millimeter-mm-millimetre