Originally Posted by
John E
Just divide by 3.14159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706 79 ...
Sorry ... I just wanted to see if I still knew it ...
WRONG, WRONG, WRONG. You don't divide the inch measurement by Pi to get the metric measurement. PI is for finding the circumference, not diameter. To get mm from inches, divide the inch measurement by .03937. There are 25.4 mm's in an inch.
Jon