A month or so back I needed help with laying out 3 bolt holes for a project. The long and short of it stirred up some great help by the group, and MARV KLOTZ chimed in with a calculator formula. I am hoping to get some hand holding help here with how exactly I need to enter this into my calculator, because I am not getting the right numbers it seems.
For example, here is the formula that Marv posted:: The center-to-center distance is referred to as the 'chord'. If that's known, then calculate the 'angle' between adjacent bolt holes as:
angle = 360 / (number of bolt holes)
Then the bolt circle radius is given by: