On further reflection, I guess I can leave the Music to Math bits for the smrt people, but a formula that might work for any Zoom level and/or Meter might be:
[Number of Pad Steps that will be Divided]/[Number of Note Events that you wan to occur there]
The result: Whole numbers = PadSteps; decimals = Offset
Where PadSteps are consecutive Pads… (using a slightly different terminology because Step has a specific meaning in this stuff that we do)