base 16 is a positional numeral system with sixteen as its base. It uses 16 different digits for representing numbers. The digits for base 16 could be 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, and f.

conversion table

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