How many Simanim (Not Seifim) are there in all of Shulchan Aruch?
According to Sefaria there are
- 697 simanim in Orach Chaim
- 402 in Yoreh Deah (as @msh210 and @DoubleAA pointed out, there is no siman 168 but there are 2 simanim numbered 297)
- 178 in Even Haezer
- 427 in Choshen Mishpat
Total: 1704 simanim
If you are asking because you want to review (every month as was the original purpose, or every year), it would more balanced to split according to the number of seifim as some simanim are very large.