12 (i'm american)

Wait urm .. ah.. Uhm. What was it that you asked?

depends on how you count

counting like anyone else: maybe 10
if you were to count in binary: up to 1024 I guess? depends on how flexible your fingers are (which is especially difficult with the ring and middle fingers)

2^10 =1.024

depends on the base i use and on the counting system 🥴

depends on the system! the easiest for without having to think too much is counting to 28. if i use the binary system it's more, but i often misscount then

1024

Depends on what we count as a finger

Hypothetically from 0 to 1023 in binary, but my ring finger is inflexible, so it's just 0 to 255, and I'd have to spend a very long time explaining how I'm doing it. The next best thing is base 6, where I can count from 0 to 35, and the third best thing is base 10, where I can count from 0 to 10.

<Nim>
In base 1: 10
In base 2: 1023