I lost my formula to find FOC, anyone have it?

I think theres one in the "how to" section.

Gilbert

Thank you , Gilbert

here you go;
(balance point length(from nock grove) -  mid point of arrow)/OAL=Foc

Ex. bpl=17  oal=28"

(17-28/2)/28=foc
(17-14)/28"=foc
3/28=10.72 foc(in percent)

Thank you cbCrow.