Perforated Metal Chart

Perforations	Centers	Holes/sq. inch	Open area	Width direction	Length direction
.020 inch	–	625	20 %	.530	.465
1/16 inch	1/8 inch	–	23 %	.500	.435
5/64 inch	7/64 inch	–	46 %	.286	.225
5/64 inch	1/8 inch	–	36 %	.375	.310
3/32 inch	5/32 inch	–	32 %	.400	.334
3/32 inch	3/16 inch	–	23 %	.500	.435
1/110 inch	5/32 inch	–	36 %	.360	.296
1/8 inch	3/16 inch	–	40 %	.333	.270
1/8 inch	7/32 inch	–	29 %	.428	.363
1/8 inch	¼ inch	–	23 %	.500	.435
5/32 inch	7/32 inch	–	46 %	.288	.225
5/32 inch	¼ inch		36 %	.375	.310
3/16 inch	¼ inch		51 %	.250	.192
3/16 inch	5/16 inch	–	33 %	.400	.334
¼ inch	5/16 inch	–	58 %	.200	.147
1/4 inch	3/8 inch	–	40 %	.333	.270
¼ inch	7/16 inch	—	30 %	.428	.363
1/4 inch	½ inch	–	23 %	.500	.435
3/8 inch	½ inch	–	51 %	.250	.192
3/8 inch	9/16 inch	–	40 %	.333	.270
3/8 inch	5/8 inch	–	33 %	.400	.334
7/16 inch	5/8 inch	–	45 %	.300	.239
1/8 inch	11/16 inch	–	47 %	.273	.214
9/16 inch	¾ inch	–	51 %	.250	.192
5/8 inch	13/16 inch	–	53 %	.231	.175
3/4 inch	1 inch	–	51 %	.250	.192
Round Holes
.020 in	–	625	20 %	–	–
.023 in	–	576	24 %	–	–
.027 in	–	400	23 %	–	–
.032 in	–	324	26 %	–	–
.040 in	–	225	30 %	—	–
.045 in	–	225	37 %	–	–
1/16 in	1/8 in	–	23 %	–	–
5/64 in	7/64 in	–	41 %	–	–
5/64 in	1/8 in	–	36 %	–	–
3/32 in	5/32 in	–	32 %	–	–
3/32 in	3/16 in	–	23 %	–	–
3/32 in	¼ in	–	12 %	–	–
1/10 in	5/32 in	–	36 %	–	–
1/8 in	3/16 in	–	35 %	–	–
1/8 in	7/32 in	–	29 %	–	–
1/8 in	¼ in	–	23 %	–	–
5/32 in	7/32 in	–	46 %	–	–
5/32 in	¼ in	–	36 %	–	–
3/16 in	¼ in	–	51 %	–	–
3/16 in	5/16 in	–	33 %	–	–
¼ in	5/16 in	–	58 %	–	–
1/4 in	3/8 in	–	40 %	–	–
¼ in	7/16 in	–	30 %	–	–
¼ in	½ in	–	23 %	–	–
3/8 in	9/16 in	–	51 %	–	–
3/8 in	5/8 in	–	40 %	–	–
7/16 in	5/8 in	–	33 %	–	–
½ in	11/16 in	–	45 %	–	–
9/16 in	¾ in	–	47 %	–	–
5/8 in	13/16 in	–	51 %	–	–
3/4 in	1 in	–	53 %	–	–
Slotted Sheet
1/8 x ¾ in	–	–	41 %	–	–
1/8 x 1 in	–	–	43 %	–	–

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Perforated Metal Chart