Convert Inches to Micrometers

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

Results in Micrometers:
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1 in = 25,400 µm

How to Convert Inches to Micrometers

Tape measures can be used to measure units of length, and a calculator can be used to convert to another unit

To convert an inch measurement to a micrometer measurement, multiply the length by the conversion ratio. One inch is equal to 25,400 micrometers, so use this simple formula to convert:

micrometers = inches × 25,400

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

For example, here's how to convert 5 inches to micrometers using the formula above.
5" = (5 × 25,400) = 127,000 µm

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

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


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 know as a double-prime. Often a double-quote (") is used instead of a double-prime for convenience. Using the double-prime, 1 in can be written as 1″.

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

The standard ruler has 12", and are 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.


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.

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.

If you need a ruler you can also download and print our free printable rulers, which include both imperial and metric measurements.

Inch Measurements and Equivalent Micrometer Conversions

Common inch values converted to the equivalent micrometer value
Inches Micrometers
1" 25,400 µm
2" 50,800 µm
3" 76,200 µm
4" 101,600 µm
5" 127,000 µm
6" 152,400 µm
7" 177,800 µm
8" 203,200 µm
9" 228,600 µm
10" 254,000 µm
11" 279,400 µm
12" 304,800 µm
13" 330,200 µm
14" 355,600 µm
15" 381,000 µm
16" 406,400 µm
17" 431,800 µm
18" 457,200 µm
19" 482,600 µm
20" 508,000 µm
21" 533,400 µm
22" 558,800 µm
23" 584,200 µm
24" 609,600 µm
25" 635,000 µm
26" 660,400 µm
27" 685,800 µm
28" 711,200 µm
29" 736,600 µm
30" 762,000 µm
31" 787,400 µm
32" 812,800 µm
33" 838,200 µm
34" 863,600 µm
35" 889,000 µm
36" 914,400 µm
37" 939,800 µm
38" 965,200 µm
39" 990,600 µm
40" 1,016,000 µm


  1. National Institute of Standards and Technology, Handbook 133 - 2019 Edition,

More Inch Length Conversions

US Customary & Imperial Units
Convert to Miles
1" is equal to 1.5783E-5 miles
Convert to Yards
1" is equal to 0.027778 yards
Convert to Feet
1" is equal to 0.083333 feet
SI Units
Convert to Kilometers
1" is equal to 2.54E-5 kilometers
Convert to Meters
1" is equal to 0.0254 meters
Convert to Centimeters
1" is equal to 2.54 centimeters
Convert to Millimeters
1" is equal to 25.4 millimeters
Convert to Nanometers
1" is equal to 25,400,000 nanometers