Convert Micrometers to Inches
1 micrometer (µm) equals 0.00003937007874 inches (in).
1 µm = 0.00003937007874 in
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk micrometer to inch converter to paste a column from Excel.
How to Convert Micrometer to Inch
- 1 µm = 0.00003937007874 in
- 1 in = 25400 µm
- Example: convert 15 µm to in: 15 µm = 15 × 0.00003937007874 in = 0.0005905511811 in
Reference conditions. in: The international yard and pound agreement (1959) fixed 1 yard = 0.9144 m exactly, so the inch, foot and mile are exact.
Formula
in = µm ÷ 25400
Derivation from SI units:
- 1 µm = 10⁻⁶ m
- 1 in = 2.54 cm = 0.0254 m (exact)
- 1 µm = 0.000001 m ÷ 0.0254 m per in = 0.00003937007874016 in
Both units are defined exactly, so the factor is exact. Micrometer definition: micrometer; Inch definition: inch.
Worked examples
- A reading of 5 µm converts to 0.0001968503937 in.
5 µm × 0.00003937007874 = 0.0001968503937 in - A value of 75 µm is 0.002952755906 in.
75 µm × 0.00003937007874 = 0.002952755906 in
Micrometer to Inch conversion table
| Micrometers (µm) | Inches (in) |
|---|---|
| 0.1 µm | 0.000003937007874 in |
| 0.3 µm | 0.00001181102362 in |
| 0.5 µm | 0.00001968503937 in |
| 1 µm | 0.00003937007874 in |
| 2.5 µm | 0.00009842519685 in |
| 5 µm | 0.0001968503937 in |
| 10 µm | 0.0003937007874 in |
| 20 µm | 0.0007874015748 in |
| 25 µm | 0.0009842519685 in |
| 50 µm | 0.001968503937 in |
| 75 µm | 0.002952755906 in |
| 100 µm | 0.003937007874 in |
| 150 µm | 0.005905511811 in |
| 200 µm | 0.007874015748 in |
| 500 µm | 0.01968503937 in |
| 1000 µm | 0.03937007874 in |
Where it's used
Micrometers are used for particle and filter ratings (PM2.5, PM10, HEPA tested at 0.3 µm), while inches appear in screen and TV sizes (diagonal). Both measure length and distance, so the conversion is a fixed factor.
Micrometer to other length units
| Conversion | 1 µm equals |
|---|---|
| micrometer to meter | 0.000001 m |
| micrometer to kilometer | 1 × 10⁻⁹ km |
| micrometer to centimeter | 0.0001 cm |
| micrometer to millimeter | 0.001 mm |
| micrometer to nanometer | 1000 nm |
| micrometer to angstrom | 10000 Å |
| micrometer to mile | 6.213711922 × 10⁻¹⁰ mi |
| micrometer to yard | 0.000001093613298 yd |
| micrometer to foot | 0.000003280839895 ft |
| micrometer to inch | 0.00003937007874 in |
| micrometer to mil | 0.03937007874 mil |
| micrometer to nautical mile | 5.399568035 × 10⁻¹⁰ nmi |
Frequently asked questions
How many inches are in 1 micrometer?
1 µm = 0.00003937007874 in.
How do I convert micrometers to inches?
Multiply the value in µm by 0.00003937007874, or divide it by 25400. For example, 15 µm × 0.00003937007874 = 0.0005905511811 in.
Is the µm to in conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7, SI prefixes.
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "inch (in)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Micrometers to Inches. Retrieved October 17, 2026, from https://scientificconverters.com/length/micrometers-to-inches/
IEEE
Scientific Converters, "Convert Micrometers to Inches," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/length/micrometers-to-inches/