Quote Originally Posted by jackvance
Quote Originally Posted by spoonitnow
Under a second for smaller ranges, 2-3 seconds for larger ranges.
Rainman? Hah j/k I wonder if I could do this quickly if I spend some hours/days training..
If you already know what you think your opponent's range is (which you always should), then calculating your approximate equity against that range (and various subranges) is not difficult at all.