Wire Mesh Converter
Convert between mesh, wire opening and wire diameter, with the visual guide, weave options, alloy descriptions and full conversion chart.
Convert between mesh, wire opening and wire diameter, with the visual guide, weave options, alloy descriptions and full conversion chart.
Enter any one value for a chart estimate, or any two (e.g. mesh + wire) for an exact result. Switch units per field.
Bold = readily available / commonly stocked (light = mill grade, more open area; standard = market grade, general-purpose); non-bold = reasonable assumption.
| Mesh | Wire duty | Opening (µm) | Opening (mm) | Opening (inch) | Wire Ø (mm) | Open area (%) |
|---|
Openings and open area vary with the real wire diameter; confirm the exact spec with a GQI specialist.
Prefer it on paper? Print this chart (PDF) · Pocket version (4×6, two-sided)
Mesh count = 25.4 mm ÷ (w + d)
Open area A0 = (w ÷ (w + d))2 × 100%
w = wire opening (aperture); d = wire diameter.
A sieve number is a designation, not a wire count. ASTM E11 alternative designations (No.) are names for a standard opening size, so the mesh equation this calculator uses does not apply to them: a No. 12 sieve is not woven twelve wires to the inch. Read a sieve call-out here as an opening, then specify the screen cloth from the conversion chart above.
| ASTM E11 designation | Opening (µm) | Opening (mm) | Opening (inch) | Tyler equivalent (mesh) |
|---|
Openings per the current ASTM E11 series. A Tyler mesh number is not the same sieve as the E11 number: Tyler 10 mesh is E11 No. 12 (1.70 mm). Not used in any calculation on this page.
Converts between mesh count, opening and wire diameter for woven wire cloth, using the market-grade standard-duty series. ASTM sieve numbers are shown as a separately labeled designation table because sieve designations are legacy labels, not weave arithmetic. Specialty weaves, other duty classes and supplier-specific cloths differ: confirm against the physical cloth specification before ordering.