I always just played with my saddle height till it felt right. It was only about six years ago after coming to BF and seeing that too many seem to rely on formulas to tell them what to do that I measured my saddle height.
I was pleasantly surprised that when measured from the pedal to the top of my saddle it was 109% of my inseam.
Measuring to the pedal makes more sense to me, but only a tad. Then you only have to transfer that measurement to any other road bike and not have to worry if it has 165mm cranks or 175mm cranks.