Inches to Micrometers (in to µm) Converter

How to convert inches to micrometers

Formulaµm = in × 25,400

Multiply the value in inches by 25,400. To go the other way, multiply by 0.00003937007874 (or divide by 25,400).

An inch is larger than a micrometer: one inch contains 25,400 micrometers.

Worked examples

1 inch1 in × 25,400 = 25,400 µm
5 inches5 in × 25,400 = 127,000 µm
10 inches10 in × 25,400 = 254,000 µm
20 inches20 in × 25,400 = 508,000 µm
100 inches100 in × 25,400 = 2,540,000 µm

Inches to micrometers conversion table

Values are calculated by the conversion engine and rounded to 8 significant figures.

Inches to micrometers: 0.1–10 in
Inches (in)	Micrometers (µm)
0.1 in	2,540 µm
0.25 in	6,350 µm
0.5 in	12,700 µm
1 in	25,400 µm
2 in	50,800 µm
3 in	76,200 µm
4 in	101,600 µm
5 in	127,000 µm
6 in	152,400 µm
7 in	177,800 µm
8 in	203,200 µm
9 in	228,600 µm
10 in	254,000 µm

Inches to micrometers: 12–1,000 in
Inches (in)	Micrometers (µm)
12 in	304,800 µm
15 in	381,000 µm
20 in	508,000 µm
25 in	635,000 µm
30 in	762,000 µm
40 in	1,016,000 µm
50 in	1,270,000 µm
75 in	1,905,000 µm
100 in	2,540,000 µm
250 in	6,350,000 µm
500 in	12,700,000 µm
1,000 in	25,400,000 µm

About the units

Inch (in)

A US customary and imperial unit defined as exactly 25.4 mm since 1959. Twelve inches make a foot. Screen sizes, tire diameters and lumber dimensions are usually given in inches. One inch equals 0.0254 meters (m).

Micrometer (µm)

One millionth of a metre, often called a micron. Human hair is roughly 50–100 µm across, and filter and particle sizes are given in micrometres. One micrometer equals 0.000001 meters (m).

Frequently asked questions

How many micrometers are in one inch?

There are 25,400 micrometers in one inch, and this value is exact by definition.

How do I convert inches to micrometers?

Multiply the number of inches by 25,400. For example, 10 in × 25,400 = 254,000 µm.

How many inches are in one micrometer?

One micrometer equals 0.00003937007874 inches. That is the reverse factor, 1 ÷ 25,400.

What is 10 inches in micrometers?

10 in = 254,000 µm.

Is this in to µm converter accurate?

Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.

Inches to Micrometers Converter