base 15 is a positional numeral system with fifteen as its base. It uses 15 different digits for representing numbers. The digits for base 15 could be 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, and e.

conversion table

base 15	hexadecimal (base 16)	base 15	hexadecimal (base 16)
1	≈ 1	b	≈ b
2	≈ 2	c	≈ c
3	≈ 3	d	≈ d
4	≈ 4	e	≈ e
5	≈ 5	10	≈ f
6	≈ 6	11	≈ g
7	≈ 7	12	≈ h
8	≈ 8	13	≈ i
9	≈ 9	14	≈ j
a	≈ a	15	≈ 10