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Woven wire mesh sizes: mesh count, wire diameter, opening and open area — 2 to 325 mesh (square weave, market and mill grade)

What is the wire diameter, opening size and open area of 4, 8, 10, 20, 40 and 100 mesh woven wire cloth? · Standard part · basis: Woven Wire Products' market-grade table (39 rows, 2 to 325 mesh), its stainless 14 to 20 mesh sheets and Newark Wire Cloth's mill-grade table (29 rows, 2 to 60 mesh), with the open area recomputed; numbers only

Also called: wire mesh size chart, 10 mesh wire diameter opening, 4 mesh woven wire cloth open area, 20 mesh stainless wire cloth opening size, 100 mesh wire diameter, mesh to mm opening chart, wire cloth open area formula, 40 mesh wire cloth opening, mesh count vs wire diameter, 8 mesh 0.032 wire opening, stainless mesh 16 mesh wire diameter .009, woven wire cloth specification table

Exact dimensions. True size, with no tolerance added.

sizes: 72 in table

Notes

Mesh count is the number of openings per linear inch, counted from the centre of one wire to the same point 1 inch away. For square plain weave with wire diameter d (in) and count m, the opening is 1/m − d and the open area is (1 − m × d)² (as a fraction). The last two columns apply those two formulas to the printed mesh and wire diameter; they are computed here as a check and match the printed opening and open area to rounding in every row.
A mesh count does not fix the wire: the same count is made with several wire diameters, which changes the opening and open area. Woven Wire Products lists 4 mesh with 0.047 in wire (0.203 in opening, 65.9% open) and with 0.063 in wire (0.187 in, 56.0%); Newark's mill-grade 4 × 4 uses 0.035 in wire (0.215 in, 74.0%). The two makers' tables are different grades (market grade against mill grade) and differ at nearly every count; state the wire diameter, not just the mesh, when you order.
Mesh sizes are normally ordered as 'mesh × mesh × wire diameter' (for example 10 × 10 × 0.025). The Woven Wire Products stainless rows (14 to 20 mesh, 0.009 in wire) are the fine-wire, high-open-area version and carry T-304 and T-316 data sheets on the maker's site (not read). Wire diameters in mm are converted × 25.4 (computed) where the maker does not print them. Other weaves (twill, Dutch), rectangular mesh, space cloth and welded wire mesh are not covered here.
Sieves and screens: US sieve numbers and mesh counts are close but not identical series; this page lists wire cloth only. Not to be confused with expanded metal (expanded-metal-standard-designations-swd-lwd), perforated sheet (perforated-metal-round-hole-standard-patterns) or the regenerator screens on this site. Gauge for wire diameters: awg-wire-gauge-table-astm-b258 and swg-standard-wire-gauge-table. No file: woven cloth is wire crossing over and under wire, and the crimp is not published as numbers.

Woven wire mesh sizes: mesh count, wire diameter, opening and open… size chart

source	mesh count	wire dia (in)	wire dia (mm)	opening (in)	opening (mm)	open area % (printed)	open area % = 100 × (1 − m d)² (computed)	opening in = 1/m − d (computed)
Woven Wire Products, market grade	2 mesh	0.063	1.600	0.437	11.100	76.4	76.4	0.4370
Woven Wire Products, market grade	3 mesh	0.054	1.372	0.279	7.087	70.1	70.2	0.2793
Woven Wire Products, market grade	4 mesh	0.047	1.194	0.203	5.156	65.9	65.9	0.2030
Woven Wire Products, market grade	4 mesh	0.063	1.600	0.187	4.750	56.0	56.0	0.1870
Woven Wire Products, market grade	5 mesh	0.041	1.041	0.159	4.039	63.2	63.2	0.1590
Woven Wire Products, market grade	5 mesh	0.047	1.194	0.153	3.886	58.5	58.5	0.1530
Woven Wire Products, market grade	6 mesh	0.035	0.889	0.132	3.353	62.7	62.4	0.1317
Woven Wire Products, market grade	7 mesh	0.035	0.889	0.108	2.743	57.0	57.0	0.1079
Woven Wire Products, market grade	8 mesh	0.028	0.711	0.097	2.464	60.2	60.2	0.0970
Woven Wire Products, market grade	8 mesh	0.032	0.813	0.093	2.362	55.4	55.4	0.0930
Woven Wire Products, market grade	9 mesh	0.032	0.813	0.079	2.007	50.7	50.7	0.0791
Woven Wire Products, market grade	10 mesh	0.025	0.635	0.075	1.905	56.3	56.2	0.0750
Woven Wire Products, market grade	12 mesh	0.023	0.584	0.06	1.524	52.4	52.4	0.0603
Woven Wire Products, market grade	14 mesh	0.02	0.508	0.051	1.295	51.0	51.8	0.0514
Woven Wire Products, market grade	16 mesh	0.018	0.457	0.0445	1.130	50.7	50.7	0.0445
Woven Wire Products, market grade	16 mesh	0.023	0.584	0.0395	1.003	39.9	39.9	0.0395
Woven Wire Products, market grade	18 mesh	0.017	0.432	0.0386	0.980	48.3	48.2	0.0386
Woven Wire Products, market grade	20 mesh	0.016	0.406	0.034	0.864	46.2	46.2	0.0340
Woven Wire Products, market grade	22 mesh	0.015	0.381	0.0305	0.775	45.0	44.9	0.0305
Woven Wire Products, market grade	24 mesh	0.014	0.356	0.0277	0.704	44.2	44.1	0.0277
Woven Wire Products, market grade	30 mesh	0.012	0.305	0.0213	0.541	41.0	41.0	0.0213
Woven Wire Products, market grade	30 mesh	0.0125	0.318	0.0208	0.528	39.1	39.1	0.0208
Woven Wire Products, market grade	35 mesh	0.011	0.279	0.0176	0.447	37.8	37.8	0.0176
Woven Wire Products, market grade	40 mesh	0.01	0.254	0.015	0.381	36.0	36.0	0.0150
Woven Wire Products, market grade	40 mesh	0.0095	0.241	0.0155	0.394	38.4	38.4	0.0155
Woven Wire Products, market grade	45 mesh	0.008	0.203	0.0142	0.361	41.0	41.0	0.0142
Woven Wire Products, market grade	45 mesh	0.0095	0.241	0.0127	0.323	32.7	32.8	0.0127
Woven Wire Products, market grade	50 mesh	0.009	0.229	0.011	0.279	30.3	30.3	0.0110
Woven Wire Products, market grade	60 mesh	0.0075	0.190	0.0092	0.234	30.3	30.3	0.0092
Woven Wire Products, market grade	70 mesh	0.0065	0.165	0.0078	0.198	29.7	29.7	0.0078
Woven Wire Products, market grade	70 mesh	0.007	0.178	0.0073	0.185	26.1	26.0	0.0073
Woven Wire Products, market grade	80 mesh	0.0055	0.140	0.007	0.178	31.4	31.4	0.0070
Woven Wire Products, market grade	90 mesh	0.005	0.127	0.0061	0.155	30.1	30.3	0.0061
Woven Wire Products, market grade	100 mesh	0.0045	0.114	0.0055	0.140	30.3	30.3	0.0055
Woven Wire Products, market grade	110 mesh	0.004	0.102	0.0051	0.130	31.4	31.4	0.0051
Woven Wire Products, market grade	120 mesh	0.0037	0.094	0.0046	0.117	30.9	30.9	0.0046
Woven Wire Products, market grade	150 mesh	0.0026	0.066	0.0041	0.104	37.4	37.2	0.0041
Woven Wire Products, market grade	200 mesh	0.0021	0.053	0.0029	0.074	33.6	33.6	0.0029
Woven Wire Products, market grade	325 mesh	0.0014	0.036	0.0017	0.043	30.0	29.7	0.0017
Woven Wire Products, stainless (T-304 / T-316 sheets)	14 mesh	0.009	0.229	0.0624	1.58	76.4	76.4	0.0624
Woven Wire Products, stainless (T-304 / T-316 sheets)	16 mesh	0.009	0.229	0.0535	1.359	73.3	73.3	0.0535
Woven Wire Products, stainless (T-304 / T-316 sheets)	18 mesh	0.009	0.229	0.0466	1.184	70.2	70.2	0.0466
Woven Wire Products, stainless (T-304 / T-316 sheets)	20 mesh	0.009	0.229	0.041	1.041	67.2	67.2	0.0410
Newark Wire Cloth, mill grade	2 × 2	0.054	1.37	0.446	11.33	79.6	79.6	0.4460
Newark Wire Cloth, mill grade	3 × 3	0.041	1.04	0.292	7.43	76.9	76.9	0.2923
Newark Wire Cloth, mill grade	4 × 4	0.035	0.89	0.215	5.46	74.0	74.0	0.2150
Newark Wire Cloth, mill grade	5 × 5	0.032	0.81	0.168	4.27	70.6	70.6	0.1680
Newark Wire Cloth, mill grade	6 × 6	0.028	0.71	0.139	3.52	69.2	69.2	0.1387
Newark Wire Cloth, mill grade	7 × 7	0.028	0.71	0.115	2.92	64.6	64.6	0.1149
Newark Wire Cloth, mill grade	8 × 8	0.025	0.64	0.1	2.54	64.0	64.0	0.1000
Newark Wire Cloth, mill grade	9 × 9	0.023	0.58	0.088	2.24	62.9	62.9	0.0881
Newark Wire Cloth, mill grade	10 × 10	0.02	0.51	0.08	2.03	64.0	64.0	0.0800
Newark Wire Cloth, mill grade	11 × 11	0.02	0.51	0.071	1.8	60.8	60.8	0.0709
Newark Wire Cloth, mill grade	12 × 12	0.018	0.46	0.065	1.66	61.5	61.5	0.0653
Newark Wire Cloth, mill grade	14 × 14	0.017	0.43	0.054	1.38	58.1	58.1	0.0544
Newark Wire Cloth, mill grade	16 × 16	0.016	0.41	0.047	1.18	55.4	55.4	0.0465
Newark Wire Cloth, mill grade	18 × 18	0.015	0.38	0.041	1.03	53.3	53.3	0.0406
Newark Wire Cloth, mill grade	20 × 20	0.014	0.36	0.036	0.91	51.8	51.8	0.0360
Newark Wire Cloth, mill grade	22 × 22	0.0135	0.34	0.032	0.81	49.4	49.4	0.0320
Newark Wire Cloth, mill grade	24 × 24	0.013	0.33	0.029	0.73	47.3	47.3	0.0287
Newark Wire Cloth, mill grade	26 × 26	0.011	0.28	0.027	0.7	51.0	51.0	0.0275
Newark Wire Cloth, mill grade	28 × 28	0.01	0.25	0.026	0.65	51.8	51.8	0.0257
Newark Wire Cloth, mill grade	30 × 30	0.0095	0.24	0.024	0.61	51.1	51.1	0.0238
Newark Wire Cloth, mill grade	32 × 32	0.009	0.23	0.022	0.57	50.7	50.7	0.0222
Newark Wire Cloth, mill grade	34 × 34	0.009	0.23	0.02	0.52	48.2	48.2	0.0204
Newark Wire Cloth, mill grade	36 × 36	0.009	0.23	0.019	0.48	45.7	45.7	0.0188
Newark Wire Cloth, mill grade	38 × 38	0.0085	0.22	0.018	0.45	45.8	45.8	0.0178
Newark Wire Cloth, mill grade	40 × 40	0.0085	0.22	0.017	0.42	43.6	43.6	0.0165
Newark Wire Cloth, mill grade	45 × 45	0.008	0.2	0.014	0.36	41.0	41.0	0.0142
Newark Wire Cloth, mill grade	50 × 50	0.0075	0.19	0.013	0.32	39.1	39.1	0.0125
Newark Wire Cloth, mill grade	55 × 55	0.007	0.18	0.011	0.28	37.8	37.8	0.0112
Newark Wire Cloth, mill grade	60 × 60	0.0065	0.17	0.01	0.26	37.2	37.2	0.0102

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

Woven Wire Products	Market grade wire mesh: mesh count, wire diameter, opening, open area %, 2 to 325 mesh	web	Maker page; numbers only
Woven Wire Products	Product specifications: stainless 14, 16, 18, 20 mesh with 0.009 in wire (opening in inch and mm, wire in inch and mm, open area)	web	Maker page; numbers only
Newark Wire Cloth	Mill grade wire cloth: 2 × 2 to 60 × 60 mesh, wire diameter, opening and open area in inch and mm	web	Maker sheet; numbers only

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Plain text: sheet.txt · JSON: /api/geometry?object=woven-wire-mesh-sizes-opening-open-area

Schematic, not to scale.

Fits with

Free

Perforated metal standard round-hole patterns: hole diameter × center pitch, 60° staggered, open area % and gauge (McNichols, Hendrick, EDCON) + 60 × 45 mm sample plates60.0×45.0×4.76 mm★ 6 files Free

Expanded metal standard designations: 1/2-#13, 3/4-#9, 1-1/2-#9 — SWD, LWD, strand width, strand thickness, standard (raised) vs flattened49 sizes★ sheet Free

AWG wire gauge table (ASTM B258): 4/0 to 56 AWG, diameter in mils, inches and mm, area in circular mils and mm²60 sizes★ sheet Free

SWG standard wire gauge table (British, BS 3737): 7/0 to 50, diameter in inches and mm57 sizes★ sheet Free

Tri-clamp screen gaskets: 1½ to 4 in, Ø2 and Ø3 mm perforated plate, isometric render of a generated part

Tri-clamp screen gaskets: 1½ to 4 in, Ø2 and Ø3 mm perforated plate8 sizes★ 8 files Free

Sheet metal gauge chart: steel, galvanized, stainless and aluminum (10, 12, 14, 16, 18, 20 gauge in inches and mm)36 sizes★ sheet

Questions

What is the opening of 10 mesh wire cloth?

0.075 in with 0.025 in wire (Woven Wire Products, 56.3% open) or 0.080 in with 0.020 in wire (Newark mill grade, 64.0% open): the opening is 1/10 − the wire diameter.

How do I calculate open area of wire mesh?

(1 − mesh count × wire diameter in inches)² × 100. For 20 mesh with 0.016 in wire that is (1 − 0.32)² = 46.2%, which is what Woven Wire Products prints.

What does mesh count mean?

Openings per linear inch, measured from wire centre to the same point one inch along. 100 mesh has 100 openings to the inch.

Does the same mesh always have the same opening?

No. 4 mesh is 0.203 in open with 0.047 in wire and 0.187 in with 0.063 in wire (Woven Wire Products); the opening depends on the wire.