Micron to Inch Formula
in = µ x 3.9370e-5
Conversion factors follow SI relationships published by BIPM and NIST, where those standards apply.
Micron to Inch Converter
Quick Answer
1 µ = 3.9370e-5 in
Formula: Inch = Micron x 3.9370e-5
Quick values
Worked examples
Convert 1 µ to in
in = 1 x 3.9370e-5
Result: 1 µ = 3.9370e-5 in
Convert 10 µ to in
in = 10 x 3.9370e-5
Result: 10 µ = 0.000393701 in
Convert 100 µ to in
in = 100 x 3.9370e-5
Result: 100 µ = 0.00393701 in
About Micron and Inch
Divide microns by 25,400 to get inches. 25.4 µm is 0.001 in (one mil). Filter bags, Ra surface-finish notes, and medical-device films are often specified in microns and must match inch drawings.
Category hub: Length Conversion · Conversion charts · Conversion formulas
Micron to Inch Conversion Table
| Micron (µ) | Inch (in) |
|---|---|
| 1 µ | 3.9370e-5 in |
| 10 µ | 0.000393701 in |
| 25.4 µ | 0.001 in |
| 50 µ | 0.0019685 in |
| 100 µ | 0.00393701 in |
| 250 µ | 0.00984252 in |
| 500 µ | 0.019685 in |
| 1000 µ | 0.0393701 in |
| 25400 µ | 1 in |
Browse all conversion charts → · Browse conversion formulas →
Practical use cases for Micron to Inch
ISO filter to US catalogs
A 40 µm hydraulic filter is 0.00157 in. US cross-reference sheets still list inch openings.
Paint and anodize thickness
25 µm coating specs become 0.001 in (1 mil) on US thickness gauges. Inspectors convert before a fail/pass call.
Medical mesh and film
Pore size in microns must match US regulatory filings that still accept inch dimensions.
Precision grind stock
A 10 µm grind pass is 0.000394 in. US grinders graduated in ten-thousandths need that inch value.
Micron to Inch FAQs
Common questions about converting micron to inch.
How do you convert microns to inches?
Divide microns by 25,400. Example: 25.4 µm = 0.001 in, 100 µm = 0.003937 in, 1,000 µm = 0.03937 in (1 mm).
What is 50 microns in inches?
50 / 25,400 ≈ 0.001969 in, about 2 mil. That is a typical trash-bag or paint-film thickness.
How many microns are in a mil?
1 mil = 0.001 in = 25.4 µm. Convert microns to mils by dividing by 25.4 if the shop talks in thou rather than inches.
Is this microns to inches or micrometers to inches?
Same length. This URL uses the micron unit. Use the micrometer pair only if you need that exact database key; the factor is identical.
Charts and printable PDF
Browse the conversion-chart library for printable micron / inch tables. PDF files are linked only when a matching download already exists.
Embed this converter
Add this micron to in calculator to another site with one async script or a lazy iframe. Keep the Powered by AllUnitConversions attribution so referrals stay canonical.
Docs: /embed?pair=micron-to-in · iframe source: /widget