10 or so chapter?
Let's see dealing with Toya, All for One VS All Might with his rewind almost done, Gravity girl dealing with Blood girl's love/blood issue. and Deku vs Tomura are all that's left.
I assume Toya will be dealt within the next chapter or two.
All might and All for one for two maybe three.
Maybe two or three for the girls' issue.
Then five for the final battle and conclusion/epilogue.
Edit this chapter finishes the Toya issue, next is Blood Girl's love issue.
Currently we are in the middle of Volume 39
The latest volume #38 just recently came out in Japan and it ended at Chapter 386.
I should say that ever since Volume 36 came out there have been about 12 chapters per volume.
#36 covered from Chapters 351 to 362 = 12 Chapters Total
#37 covered from Chapters 363 o 374 = 12 Chapters Total
Latest (#38) covered Ch 375 to 386 = 12 Chapters Total
Now if this series does actually end with Chapter 400.... then it's possible that Volume 39 could end up with 14 Chapters in total!