Wire mesh calculator

Enter a mesh count and a wire diameter to get the aperture, the open area and the weight of the mesh.

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40 mesh, 0.254 mm wire, stainless steel

pitch 0.635 mmaperture 0.381 mmwire 0.254 mm
Drawn in proportion, not to size.
Aperture381 microns
0.381mm
Open area
36.0%
Weight per m²Stainless steel, approx.
1.290kg
Total weightAdd a piece size
–kg

How the figures are worked out

Browse wire mesh
Aperture
25.4 ÷ mesh count − wire diameter
In millimetres: the clear opening between two wires.
Open area
(aperture ÷ pitch)² × 100
A percentage. Pitch is the aperture plus one wire.
Weight per square metre
mesh count × wire diameter² ÷ 2
In kilograms, for stainless steel wire in millimetres.
Other metals
weight × metal density ÷ 7.9
Scaled by density, against stainless steel at 7.9 g/cm³.

The figures are for plain square weave with one wire diameter in both directions, and the weight is an estimate. Dutch weaves, rectangular openings and welded mesh are worked out differently: send us the specification.

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