Industrial Gold

cfm Flow

cfm Flow

Air Usage per Orifice Size

A nifty little guide to determine cfm flow based on orifice size at a given pressure.


Orifice size (inch)
1/64 1/32 1/16 1/8 1/4 3/8 1/2 5/8 3/4
psi cfm flow per orifice size
5 0.062 0.248 0.993 3.97 15.9 35.7 63.5 99.3 143
15 0.105 0.42 1.68 6.72 26.9 60.5 108 168 242
30 0.158 0.633 2.53 10.1 40.5 91.1 162 253 365
40 0.194 0.774 3.1 12.4 49.6 112 198 310 446
50 0.229 0.916 3.66 14.7 58.6 132 235 366 528
70 0.3 1.2 4.79 19.2 76.7 173 307 479 690
90 0.37 1.48 5.92 23.7 94.8 213 379 592 853
100 0.406 1.62 6.49 26 104 234 415 649 934
120 0.476 1.91 7.62 30.5 122 274 488 762 1097
150 0.582 2.37 9.45 37.5 150 338 600 910 1315