Basics of the seximal numbering system

The seximal (base-6) numbering system is a positional numeral system (like the ubiquitous decimal system) which uses six digits -- 0, 1, 2, 3, 4, and 5 -- instead of decimal's ten.

This is enough to write any number in seximal, but it doesn't actually tell us how to refer to numbers in speech. Fortunately for us, jan Misali, in this video and at seximal.net, lays out just a system. We'll cover the basics of that system here with only minor differences.

Digit names

Each position in a number contains exacly one digit. In seximal, we use a subset of decimal's digits. This is also enough to count up to five (5):

Counting in seximal

After "five" (5), we can continue to count the next six numbers using standard names, although the numerals are written differently than in decimal:

Sixes digit

After eleven (15) we have "twosy" (20), the first multiple of six, which can also be refered to by its other names "dozen" or "twelve". Numbers above this follow a pattern of "(sixes digit)-sy (ones digit)":

"Nif"

The third position in seximal, 100 (36 in decimal), is called "nif". This term is borrowed from the Ndom language. Concatenating the value of the nif digit with the sixes+ones digits gets us up to "five nif fivesy five" (555):

But we can easily extend this by pairing digits so that the third and fourth positions count nifs:

Fractional numbers

Single-digit fractions in seximal are quite simple:

Alternatively, and for fractionals with more digits, you can simply read the digits after the seximal point, just like we do for decimal:
1.2345 - "one point two three four five".