I count on my fingers using this method:
-
No fingers = 0, assume all values are cumulative unless stated otherwise.
-
Start with index finger on Right hand:
- 1 = Index
- 2 = Middle
- 3 = Ring
- 4 = Pinky
- 5 = Thumb
- After five, clear hand and start from Thumb and go until 9 (Ring)
- 6 = Thumb
- 7 = Index … etc
- Double digits are counted on Left hand*, following same process as 1-3.
- For example: 13 would be:
- Left Hand: Index
- Right Hand: Index, Middle, Ring
- For something like 47 would be:
- Left Hand: Index, Middle, Ring, Pinky
- Right Hand: Thumb, Index
Using this method, the highest you can count to is 109:
- Left Hand: Thumb, Index, Middle, Ring, Pinky
- Right Hand: Thumb, Index, Middle, Ring
You could also probably differentiate 5 and 10 by half-raising your thumb for 5, and full raise for 6-10.


I’ve been trying that Babylonian thing where you can count to twelve with each hand (so with both hand you can count up to 156), it’s easy to count but it’s quite hard to look at the fingers and figure out the number.
I do that (but only for one hand), and I’ve also associated months with each segment.
I had to think how you got to 156 instead of 12² but not for too long.