50 Mesh to Micron – Opening Size in µm & mm
50 mesh ≈ 297 µm
A US standard 50 mesh sieve has openings of about 297 µm (0.297 mm, 0.0117 in).
Step by step
- Mesh 50 means about 50 openings per linear inch.
- Opening size depends on wire thickness, so it is read from the standard sieve series (ASTM E11).
- 50 mesh ≈ 297 µm.
50 mesh separates medium to fine sand, flour-sized particles and many powders.
Details
- Opening
- 297 µm
- Millimeters
- 0.297 mm
- Inches
- 0.0117 in
- Compared with a human hair (~70 µm)
- 4.2×
How it works
Mesh number counts the openings per linear inch of a woven screen. Because the wire takes up space, the opening is smaller than 25.4 mm divided by the mesh count, and different wire gauges give different openings — so standard sieve series fix the exact opening for each number. Values here follow the US standard series; Tyler mesh numbers are close but not identical.
Nearby values
Related conversions
Frequently asked questions
What is 50 mesh in microns?
About 297 µm.
What is 50 mesh in mm?
0.297 mm.
Is higher mesh finer?
Yes — more openings per inch means smaller openings.
What is the difference between US and Tyler mesh?
They are two standard series with nearly the same openings; the numbers differ slightly for some sizes.