>> Measuring from the 1st to the 13th and doubling it will give you the scale length if you are capoed at the first fret.
That solves a different problem, which is trivial.
The problem was to calculate the scale length in spite of the fact that the nut may be compensated by shortening the distance to the 1st fret.
>> No one cares. You were joking, but I’m not, although I do think I’m funny in a dry way.
I was not joking. The scale length is 2.25289 times the distance from the 1st to 12th fret. Feel free to calculate it yourself:
((2 x K) / (2 - K)) where K is the 12th root of two; 1.0594631...
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