Binary, Octal, Decimal & Hex Chart

Number-base quick reference showing values 0–63 in binary (base 2), octal (base 8), decimal and hexadecimal (base 16).

Decimal	Binary	Octal	Hex
0	`000000`	`0`	`0`
1	`000001`	`1`	`1`
2	`000010`	`2`	`2`
3	`000011`	`3`	`3`
4	`000100`	`4`	`4`
5	`000101`	`5`	`5`
6	`000110`	`6`	`6`
7	`000111`	`7`	`7`
8	`001000`	`10`	`8`
9	`001001`	`11`	`9`
10	`001010`	`12`	`A`
11	`001011`	`13`	`B`
12	`001100`	`14`	`C`
13	`001101`	`15`	`D`
14	`001110`	`16`	`E`
15	`001111`	`17`	`F`
16	`010000`	`20`	`10`
17	`010001`	`21`	`11`
18	`010010`	`22`	`12`
19	`010011`	`23`	`13`
20	`010100`	`24`	`14`
21	`010101`	`25`	`15`
22	`010110`	`26`	`16`
23	`010111`	`27`	`17`
24	`011000`	`30`	`18`
25	`011001`	`31`	`19`
26	`011010`	`32`	`1A`
27	`011011`	`33`	`1B`
28	`011100`	`34`	`1C`
29	`011101`	`35`	`1D`
30	`011110`	`36`	`1E`
31	`011111`	`37`	`1F`
32	`100000`	`40`	`20`
33	`100001`	`41`	`21`
34	`100010`	`42`	`22`
35	`100011`	`43`	`23`
36	`100100`	`44`	`24`
37	`100101`	`45`	`25`
38	`100110`	`46`	`26`
39	`100111`	`47`	`27`
40	`101000`	`50`	`28`
41	`101001`	`51`	`29`
42	`101010`	`52`	`2A`
43	`101011`	`53`	`2B`
44	`101100`	`54`	`2C`
45	`101101`	`55`	`2D`
46	`101110`	`56`	`2E`
47	`101111`	`57`	`2F`
48	`110000`	`60`	`30`
49	`110001`	`61`	`31`
50	`110010`	`62`	`32`
51	`110011`	`63`	`33`
52	`110100`	`64`	`34`
53	`110101`	`65`	`35`
54	`110110`	`66`	`36`
55	`110111`	`67`	`37`
56	`111000`	`70`	`38`
57	`111001`	`71`	`39`
58	`111010`	`72`	`3A`
59	`111011`	`73`	`3B`
60	`111100`	`74`	`3C`
61	`111101`	`75`	`3D`
62	`111110`	`76`	`3E`
63	`111111`	`77`	`3F`

Hexadecimal digits are 0–9 followed by A=10, B=11, … F=15. Common prefixes: 0b (binary), 0o (octal), 0x (hex).

Geocaching tip: Look for 0/1 strings, digits 0–7 only, or hexadecimal digits A–F to identify the base being used.