Scale measurement conversion.

That last part about measuring a line segment is very useful. I've often done that, because I did not trust either the settings on my own copier or the intelligence of the copy service person. Draw a line on the original very carefully to a set length. Calculate the length it will be on the copy. Then say "make this line exactly 4 1/2" long."

Thanks, 72 divided by 48 equals 1.5.  So per example a 1/72 line 3" long multiplied by 1.5 would equal 4.5" in 1/48.  I've never been a rocket surgeon when it comes to higher math.  Funny thing for a trained and college educated architectual draftsman.  It was always been explain the formula out giving me the numbers I'm punching into the formula, or put it down to basic math.  Had a college professor that once he understood that, I breezed thru the structural part of the beam and roof load portions of the class.

Welcome to the Forum!

Hello and welcome to the forums.

The conversion factor is 72/48. Set the copier at 150%