Micrometers to Inches Conversion

Enter the length in micrometers below to get the value converted to inches.

Results in Inches:
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1 µm = 3.937E-5 in
Hint: use a scientific notation calculator to convert E notation to decimal

How to Convert Micrometers to Inches

To convert a micrometer measurement to an inch measurement, divide the length by the conversion ratio.

Since one inch is equal to 25,400 micrometers, you can use this simple formula to convert:

inches = micrometers ÷ 25,400

The length in inches is equal to the micrometers divided by 25,400.

For example, here's how to convert 50,000 micrometers to inches using the formula above.
50,000 µm = (50,000 ÷ 25,400) = 1.968504"

Our inch fraction calculator can add micrometers and inches together, and it also automatically converts the results to US customary, imperial, and SI metric values.

Micrometers and inches are both units used to measure length. Keep reading to learn more about each unit of measure.


One micrometer is equal to one-millionth (1/1,000,000) of a meter, which is defined as the distance light travels in a vacuum in a 1/299,792,458 second time interval.

The micrometer, or micrometre, is a multiple of the meter, which is the SI base unit for length. In the metric system, "micro" is the prefix for 10-6. A micrometer is sometimes also referred to as a micron. Micrometers can be abbreviated as µm; for example, 1 micrometer can be written as 1 µm.

To get an idea of the actual physical length of a micrometer, one human hair is 40-50 µm thick, demonstrating how small this unit of measure is.


An inch is a unit of linear length measure equal to 1/12 of a foot or 1/36 of a yard. Because the international yard is legally defined to be equal to exactly 0.9144 meters, one inch is equal to 2.54 centimeters.[1]

The inch is a US customary and imperial unit of length. Inches can be abbreviated as in; for example, 1 inch can be written as 1 in.

Inches can also be denoted using the symbol, otherwise known as a double-prime. Often a double-quote (") is used instead of a double-prime for convenience. A double-prime is commonly used to express 1 in as 1″.

A quarter is .955" in diameter, which is just smaller than 1"

The standard ruler has 12", and is a common measuring tool for measuring inches. They are also often measured using tape measures, which commonly come in lengths from 6' - 35'. Other types of measuring devices include scales, calipers, measuring wheels, micrometers, yardsticks, and even lasers.

We recommend using a ruler or tape measure for measuring length, which can be found at a local retailer or home center. Rulers are available in imperial, metric, or combination with both values, so make sure you get the correct type for your needs.

Need a ruler? Try our free downloadable and printable rulers, which include both imperial and metric measurements.

Micrometer to Inch Conversion Table

Micrometer measurements converted to inches
Micrometers Inches
1 µm 0.00003937"
2 µm 0.00007874"
3 µm 0.000118"
4 µm 0.000157"
5 µm 0.000197"
6 µm 0.000236"
7 µm 0.000276"
8 µm 0.000315"
9 µm 0.000354"
10 µm 0.000394"
100 µm 0.003937"
1,000 µm 0.03937"
10,000 µm 0.393701"
100,000 µm 3.937"


  1. National Institute of Standards and Technology, Checking the Net Contents of Packaged Goods, Handbook 133 - 2019 Edition, https://nvlpubs.nist.gov/nistpubs/hb/2019/NIST.HB.133-2019.pdf

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