Is 800 mesh finer than 600 mesh?

Higher mesh counts mean smaller openings — compare micron columns when unsure.

Can I buy exact micron cloth?

Most vendors quote mesh counts — convert using standardized charts then confirm measurements.

Does humidity affect sieve tests?

Yes — hygroscopic powders cake and skew retained masses.

Which ASTM or ISO doc applies?

ASTM E11 governs many North American test sieves while ISO 3310-1 covers woven wire internationally — cite whichever your PO references.

Why trust MeshToMicron.org?

We expose transparent handbook rows plus disclaimers — always reconcile against your supplier calibration packet.

Quick answer

800 mesh ≈ 13 µm

According to common US sieve references, 800 mesh correlates with about 13 micrometers (0.013 mm / 0.000512 in). Validate critical specs independently.

Reference opening

Mesh: 800
Millimeters (mm): 0.013
Microns (µm): 13
inch: 0.000512

Laboratory polishing cloth — nominal openings diverge wildly by weave; treat as indicative only

Approximate sieve opening — not a formula

Mesh counts describe weave density; micron columns summarize nominal aperture sizes taken from ASTM-like charts. Wire diameter tolerances, corrosion, ISO vs ASTM wording, and microscope calibration all influence measured openings.

Nearby mesh comparison

Mesh	µm	mm	Link
800	13	0.013	Mesh detail page
600	18	0.018	Mesh detail page
1000	11	0.011	Mesh detail page

Try the live calculators

Jump into the interactive tools when you need arbitrary mesh counts, micron targets, or quick copy/paste summaries for RFQs.

Mesh ↔ micron converter Micron → mesh converter Downloadable chart Sieve standards primer

How industrial teams interpret this row

Treat handbook micron openings as communication shorthand — procurement still requires supplier certs; QA needs retained-mass logs tied to calibrated stacks.

Typical applications

Teams deploy these meshes across powder coatings, pharmaceutical milling, hydraulic filtration, abrasive blasting, and precision polishing workflows.