And most architect's scales have a 3/16" scale so little conversion is
required if you don't want to bother. I have a small 4" archtects scale
that is most handy for most jobs, and a 12" version for longer stuff.
That and a caliper and a calculator is all that is needed to measure in S
scale. Inexpensive fractional inch digital calipers are now available, too,
so there's no problem there--even with conversions. The calipers
automatically convert fractional measurements to decimal and to metric.
This is why our scale is so perfect - the ease with which we can convert
scale inches to real inches. The Evergreen charts are great but as most of
us know a scale inch in 3/16 scale is .0156". For quick calcs you can round
that up to .016 and simplifying even further is to think of it as Sixteen.
Two times 16 = 32, 3 x 16 = 48 so it is very easy to quickly realize
50thousandths is slightly more than 3 scale inches. Even better is when you
can't find your scale but have a ruler with, preferably, increments of
1/64th you can still easily measure to scale. EVen if it isn't marker in
64ths but lets say 16ths you can STill make do because every 16th of an inch
is four scale inches. Moreover if you know how to divide and you have an
item that is 5/8" of an inch long (real) you can easily figure out 5/8ths is
10/16ths is 20/32nds, is 40/64ths or 40 inches long in S scale. Going the
otherway how hard is it to figure out fractions of an inch to scale?
Lets-see; 1/2 of 16 is 8 and half of that is 4. So 4thousandths of an inch
is roughly 1/4 of a scale inch. Sheesh! Heck - you don't even NEed a scale
in this scale. The only thing better would be to work in 3/8 inch scale.
Then you can actually "see" 1/2inch scale!