Engineering Tool
Mesh / Micron / Wire Gauge Converter
aperture(µm) = 25,400 / mesh − wire Ø(µm). Works both directions, with SWG gauge lookup and open-area check for square-weave cloth. This geometry does not define knitted demister pads, dutch weave ratings or absolute filtration cut points.
Input
Gauge list is British SWG only — AWG and BWG diameters differ. If your spec uses another gauge standard, enter the wire diameter in mm directly.
Result
- Mesh count
- 100/inch
- Aperture (opening)
- 154µm(0.154 mm)
- Wire diameter
- 100µm
- Open area
- 36.8%
Tell us mesh, wire, material (SS304 / SS316L / Monel / PTFE…) and quantity — we quote with material traceability documents and dimensional inspection as specified in the PI.
Engineering Disclaimer — Mesh / Micron / Wire Gauge Converter (v1.0, updated 2026-08)
This tool provides preliminary estimates only, based on generalized correlations and typical service assumptions. Actual performance depends on operating conditions, fouling, turndown, mist load, and vessel internals. Results must be verified by a qualified process engineer before purchase or fabrication. Meshium accepts no liability for decisions made solely on this output.
References: ASTM E2016-22 and ISO 9044 for square-weave wire cloth terminology; British SWG table for gauge diameters. Applies to plain square weave only.
Need project-specific review? Send us your operating conditions — for complete inquiries received on business days (UTC+8), we target a 24-hour preliminary engineering reply.
Why mesh count alone never defines a cloth
"100 mesh" only says there are 100 openings per inch — it says nothing about the size of those openings until you fix the wire diameter. The same 100 mesh woven with Ø0.10 mm wire gives a 154 µm aperture and ~37% open area; with Ø0.14 mm wire it drops to a 114 µm aperture and ~20% open area. Filtration cut point, flow resistance and cloth strength all move with that choice.
That is why woven-cloth quotations lock mesh count, wire diameter, weave type and material together. When a dimensional report is listed in the PI, it records measured (not nominal) aperture and wire values.
Worked Example
100 mesh cloth: same count, different result
Option A: finer wire
100 mesh with 0.10 mm wire gives about 154 micron aperture and around 37% open area. It favors flow and lower pressure drop, but mechanical robustness must be checked.
Option B: heavier wire
100 mesh with 0.14 mm wire gives about 114 micron aperture and around 20% open area. It may be stronger, but the lower open area can raise pressure drop or reduce capacity.
Mesh Specification FAQ
Why can two 100 mesh cloths have different apertures?
Mesh count only fixes openings per inch. Aperture also depends on wire diameter, so 100 mesh with 0.10 mm wire is much more open than 100 mesh with 0.14 mm wire.
Is mesh count the same as filtration micron rating?
No. A geometric aperture is not the same as an absolute filtration cut point. Particle shape, weave, loading, velocity and test method all matter.
What should be written on an RFQ?
State mesh count, wire diameter, aperture or opening tolerance, material grade, weave type, roll or piece size, and the material traceability and dimensional inspection documents required in the PI.