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 / ISO 3310-1 numbers are legacy names for a standard opening size, so the mesh equation this calculator uses does not apply to thema 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.
| Sieve No. | Opening (µm) | Opening (mm) | Opening (inch) | Nominal wire Ø (mm) |
|---|
Openings per ASTM E11. Wire diameters are the nominal sieve-cloth wires, carried for identification only: they are not a weave specification and feed no calculation on this page.