01 — StandardWhat is 1000 mesh in microns?
1000 mesh is not a standard test sieve number, so there is no official opening. With an assumed 12.7 µm wire (extrapolated beyond the ASTM E11 series), the opening is about 12.7 µm. Real wire cloth varies, so check the supplier's spec.
02 — Specifications1000 mesh specifications
| Opening (microns) | ≈ 12.7 µm |
| Opening (millimeters) | 0.0127 mm |
| Opening (inches) | 0.0005 in |
| US standard sieve | Not a standard size |
| Tyler equivalent | — |
| Pitch (wire center to center) | 25.4 µm |
| Assumed wire diameter | 0.0127 mm |
| Approx. open area | 25% |
03 — ApplicationsWhat is 1000 mesh used for?
The 12.7 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 12.7 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 1000 mesh value is calculated
1000 openings per inch gives a pitch of 25,400 ÷ 1000 = 25.4 µm. Subtracting an assumed 12.7 µm wire (extrapolated beyond the ASTM E11 series) leaves an opening of about 12.7 µm. Change the wire diameter in the calculator above to match your screen.
Before display rounding: 12.7 µm opening with 0.0127 mm assumed wire. The main estimate uses three significant digits; unit conversions retain more digits.
05 — CompareNearby mesh sizes
| Mesh | Microns (µm) | Millimeters | Inches |
|---|---|---|---|
| 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 1000 mesh?
1000 mesh is ≈ 12.7 µm, which is 0.0127 mm or 0.0005 inches.
What size particles can pass through 1000-mesh screens?
In a simplified comparison with the nominal opening, particles smaller than about 12.7 µm can pass through 1000-mesh screens. The 12.7 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 12.7 µm. Real sieving also depends on particle shape, sieving time and the opening tolerance of the cloth.
What is the open area of 1000 mesh?
With an assumed 0.0127 mm wire, 1000 mesh has roughly 25% open area. Thicker wire lowers the open area and the opening size.