Mesh Sizes vs. Particle Diameters

Strainers and filters - mesh size vs. particle diameter opening size. This tool helps identify the relationship between mesh sizes and particle diameters for both strainers and filters.

Mesh Sizes vs. Particle Diameters

A strainer with a cleanable screen can in general retain particles larger than 45 μm (325 mesh). Smaller particles must be retained in a filter.

Note: 1 μm = 10⁻⁶ m = 1 micron

Mesh Size	Particle Diameter (μm)
4	5205
8	2487
10	1923
14	1307
18	1000
20	840
25	710
30	590
35	500
40	420
45	350
50	297
60	250
70	210
80	177
100	149
120	125
140	105
170	88
200	74
230	62
270	53
325	44
400	37
550	25
800	15
1250	10