Mesh Size to Microns Converter — Free Calculator

Mesh	Microns (μm)	Typical use
35	500	Construction putty, tile adhesive, texture coatings
40	425	Construction putty, tile adhesive, texture coatings
45	355	Construction putty, tile adhesive, texture coatings
50	300	Construction putty, tile adhesive, texture coatings
60	250	Construction putty, tile adhesive, texture coatings
70	212	Construction putty, tile adhesive, texture coatings
80	180	Construction putty, tile adhesive, texture coatings
100	150	Construction putty, tile adhesive, texture coatings
120	125	Rubber compounding, economy interior paint, masonry primer
140	106	Rubber compounding, economy interior paint, masonry primer
170	90	Rubber compounding, economy interior paint, masonry primer
200	75	Rubber compounding, economy interior paint, masonry primer
230	63	Standard interior emulsion, PVC profiles, pipes
270	53	Standard interior emulsion, PVC profiles, pipes
325	45	Standard interior emulsion, PVC profiles, pipes
400	38	Exterior paint, industrial coatings, semi-gloss finishes
500	25	Exterior paint, industrial coatings, semi-gloss finishes
600	20	Premium paint, paper filling, satin and eggshell finishes
800	15	Premium paint, paper filling, satin and eggshell finishes
1000	13	High-gloss coatings, paper coating, premium plastics, powder coatings
1250	10	High-gloss coatings, paper coating, premium plastics, powder coatings

Mesh

Microns (μm)

500

425

355

300

250

212

180

100

150

120

125

140

106

170

200

230

270

325

400

500

600

800

1000

1250

How to use this converter

Select the conversion direction — mesh to microns or microns to mesh — enter your value, and click Convert. The tool finds the closest standard ASTM mesh size and returns the equivalent particle size along with typical applications for that grade.

What is mesh size?

Mesh size refers to the number of openings per linear inch in a sieve screen. A higher mesh number means a finer powder with smaller particles. For example, 400 mesh calcium carbonate has particles passing through a screen with 400 openings per inch, corresponding to approximately 38 microns.

Why mesh size matters for industrial minerals

In paint, rubber, PVC, and paper applications, the mesh size of calcium carbonate or other mineral fillers directly affects gloss, surface finish, dispersion, and processing behaviour. Selecting the wrong grade can reduce gloss in coatings, cause surface defects in rubber, or create processing problems in PVC compounds.

SK Stardust Industries supplies GCC from 100 to 1250 mesh from our ISO 9001:2015 certified plant in Parbatsar, Rajasthan. Contact us to request a sample or discuss your grade requirements.