Hello friends! I got this flowrate equation I wish to translate, into metric system, but somehow I find it hard to do. It is as follows: M (lb/s) = A x C x P / √(R) A: Area (inches) C: Flow coefficient P: Pressure (psi) R: Temperature (Rankine) So, to get this into SCFM I modify the equation with gas density of air 0.7494 lb/ft3 and 60s/min so I get V (SCFM) = A x P x C x 60 / [√(R) x 0.7494] this gives me SCFM. I could ofcourse just go from SCFM to m3/min, but that wouldn't be as awesome as having a formula where you could put in your data in metric. Any help would be really really helpful. Feel free to ask if there's anything unclear. Thanks a lot!