01 — StandardWhat is 600 mesh in microns?
600 mesh is not a standard test sieve number, so there is no official opening. With an assumed 21.1 µm wire (interpolated between ASTM E11 sieves), the opening is about 21.2 µm. Real wire cloth varies, so check the supplier's spec.
02 — Specifications600 mesh specifications
| Opening (microns) | ≈ 21.2 µm |
| Opening (millimeters) | 0.0212462 mm |
| Opening (inches) | 0.000836465 in |
| US standard sieve | Not a standard size |
| Tyler equivalent | — |
| Pitch (wire center to center) | 42.3 µm |
| Assumed wire diameter | 0.0210871 mm |
| Approx. open area | 25% |
03 — ApplicationsWhat is 600 mesh used for?
The 21.2 µm opening falls within the silt (3.9 µm–62.5 µm) class of the Wentworth grain-size scale. Comparing grain size with the nominal opening only: very fine sand and coarser would be retained; silt is split at about 21.2 µm. Real sieving also depends on particle shape, sieving time and the opening tolerance of the cloth.
We have no sourced application data for openings this size yet.
Ranges show common practice with sources on the mesh size by application page — always check your equipment maker's recommendation.
04 — CalculationHow the 600 mesh value is calculated
600 openings per inch gives a pitch of 25,400 ÷ 600 = 42.3 µm. Subtracting an assumed 21.1 µm wire (interpolated between ASTM E11 sieves) leaves an opening of about 21.2 µm. Change the wire diameter in the calculator above to match your screen.
Before display rounding: 21.2462134233158 µm opening with 0.0210871 mm assumed wire. The main estimate uses three significant digits; unit conversions retain more digits.
05 — CompareNearby mesh sizes
| Mesh | Microns (µm) | Millimeters | Inches |
|---|---|---|---|
| 400 mesh | 38 | 0.038 | 0.0015 |
| 450 mesh | 32 | 0.032 | 0.0013 |
| 500 mesh | 25 | 0.025 | 0.001 |
| 600 mesh | ≈ 21.2 | 0.0212462 | 0.000836465 |
| 635 mesh | 20 | 0.02 | 0.0008 |
| 800 mesh | ≈ 15.9 | 0.015875 | 0.000625 |
| 1000 mesh | ≈ 12.7 | 0.0127 | 0.0005 |
Values are ASTM E11 nominal openings (Tyler equivalents for 150 and 250 mesh). Italic ≈ values are estimates for non-standard mesh counts, calculated from the mesh count and an assumed wire diameter (interpolated between ASTM E11 sieves, or extrapolated beyond No. 635). Wire values are ASTM E11 typical wire for standard sizes.Data sources and review limits.
06 — FAQFrequently asked questions
How many microns is 600 mesh?
600 mesh is ≈ 21.2 µm, which is 0.0212462 mm or 0.000836465 inches.
What size particles can pass through 600-mesh screens?
In a simplified comparison with the nominal opening, particles smaller than about 21.2 µm can pass through 600-mesh screens. The 21.2 µm opening falls within the silt (3.9 µm–62.5 µm) class of the Wentworth grain-size scale. Comparing grain size with the nominal opening only: very fine sand and coarser would be retained; silt is split at about 21.2 µm. Real sieving also depends on particle shape, sieving time and the opening tolerance of the cloth.
What is the open area of 600 mesh?
With an assumed 0.0210871 mm wire, 600 mesh has roughly 25% open area. Thicker wire lowers the open area and the opening size.