I don't cut strings, so however many wraps it takes to wind all the slack.
I did this for most of my life—never clipped my strings—and then I found out that having the string wrap around itself on the post leads to slippage, which leads to tuning problems. I now clip my strings so there's no overlap, and they stay in tune pretty perfectly all the time. This was an important discovery for me, and I'm surprised it's not mentioned more widely. It seems most people who clip their strings do it so there's less work to do when tuning, which I never cared about, but it turns out to have that other advantage as well.