01 — StandardWhat is 800 mesh in microns?
800 mesh is not a standard test sieve number, so there is no official opening. With an assumed 15.9 µm wire (extrapolated beyond the ASTM E11 series), the opening is about 15.9 µm. Real wire cloth varies, so check the supplier's spec.
02 — Specifications800 mesh specifications
| Opening (microns) | ≈ 15.9 µm |
| Opening (millimeters) | 0.016 mm |
| Opening (inches) | 0.0006 in |
| US standard sieve | Not a standard size |
| Tyler equivalent | — |
| Pitch (wire center to center) | 31.8 µm |
| Assumed wire diameter | 0.016 mm |
| Approx. open area | 25% |
03 — ApplicationsWhat is 800 mesh used for?
A 15.9 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 15.9 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 800 mesh value is calculated
800 openings per inch gives a pitch of 25,400 ÷ 800 = 31.8 µm. Subtracting an assumed15.9 µm wire (extrapolated beyond the ASTM E11 series) leaves an opening of about 15.9 µm. Change the wire diameter in the calculator above to match your screen.
05 — CompareNearby mesh sizes
| Mesh | Microns (µm) | Millimeters | Inches |
|---|---|---|---|
| 500 mesh | 25 | 0.025 | 0.001 |
| 600 mesh | ≈ 21.2 | 0.021 | 0.0008 |
| 635 mesh | 20 | 0.02 | 0.0008 |
| 800 mesh | ≈ 15.9 | 0.016 | 0.0006 |
| 1000 mesh | ≈ 12.7 | 0.013 | 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.
06 — FAQFrequently asked questions
How many microns is 800 mesh?
800 mesh is ≈ 15.9 µm, which is 0.016 mm or 0.0006 inches.
What size particles pass through a 800 mesh screen?
In a simplified comparison with the nominal opening, particles smaller than about 15.9 µm can pass a 800 mesh screen. A 15.9 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 15.9 µm. Real sieving also depends on particle shape, sieving time and the opening tolerance of the cloth.
What is the open area of 800 mesh?
With a assumed 0.016 mm wire, 800 mesh has roughly 25% open area. Thicker wire lowers the open area and the opening size.