Binary, Hexadecimal and Decimal Conversion Chart (0–255)

0 to 32

Decimal, binary, octal and hexadecimal equivalents
Decimal	Binary	Octal	Hex
0	0000	0	0
1	0001	1	1
2	0010	2	2
3	0011	3	3
4	0100	4	4
5	0101	5	5
6	0110	6	6
7	0111	7	7
8	1000	10	8
9	1001	11	9
10	1010	12	A
11	1011	13	B
12	1100	14	C
13	1101	15	D
14	1110	16	E
15	1111	17	F
16	0001 0000	20	10
17	0001 0001	21	11
18	0001 0010	22	12
19	0001 0011	23	13
20	0001 0100	24	14
21	0001 0101	25	15
22	0001 0110	26	16
23	0001 0111	27	17
24	0001 1000	30	18
25	0001 1001	31	19
26	0001 1010	32	1A
27	0001 1011	33	1B
28	0001 1100	34	1C
29	0001 1101	35	1D
30	0001 1110	36	1E
31	0001 1111	37	1F
32	0010 0000	40	20

Decimal	Binary	Hex	Why it matters
64	0100 0000	40	Bit 6 set
100	0110 0100	64	A round decimal number
127	0111 1111	7F	Largest signed 8-bit value
128	1000 0000	80	Top bit of a byte
192	1100 0000	C0	Common first byte of private IPv4 addresses (192.168.x.x)
240	1111 0000	F0	High nibble all ones
255	1111 1111	FF	Largest byte value; full-intensity color channel (#FF)

Power	Decimal	Hex	Common name
2⁴	16	10	nibble values (16)
2⁸	256	100	values in a byte (256)
2¹⁰	1,024	400	1 KiB
2¹⁶	65,536	10000	values in 16 bits (65,536)
2²⁰	1,048,576	100000	1 MiB
2³⁰	1,073,741,824	40000000	1 GiB
2³²	4,294,967,296	100000000	values in 32 bits (≈ 4.29 billion)

Web colors like #1E90FF are three bytes in hex: red 1E (30), green 90 (144), blue FF (255). Each pair runs from 00 to FF, i.e. 0 to 255.