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Number Base Converter

Convert between binary, octal, decimal, hex, and any base

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Input

chars words sentences lines

Second Input

Results

Result

About Number Base Converter

Convert numbers between any base from 2 to 36. Auto-detects 0b, 0o, 0x prefixes. Shows simultaneous binary, octal, decimal, and hexadecimal representations.

How It Works

Uses JavaScript's parseInt() to read the input in the specified base, then toString() to convert to all four bases simultaneously.

Step by Step

1 1
2 .
3
4 E
5 n
6 t
7 e
8 r
9
10 a
11
12 n
13 u
14 m
15 b
16 e
17 r
18
19 (
20 u
21 s
22 e
23
24 0
25 b
26 ,
27
28 0
29 o
30 ,
31
32 0
33 x
34
35 p
36 r
37 e
38 f
39 i
40 x
41
42 f
43 o
44 r
45
46 a
47 u
48 t
49 o
50 -
51 d
52 e
53 t
54 e
55 c
56 t
57 i
58 o
59 n
60 )
61
62 2
63 .
64
65 S
66 e
67 l
68 e
69 c
70 t
71
72 s
73 o
74 u
75 r
76 c
77 e
78
79 a
80 n
81 d
82
83 t
84 a
85 r
86 g
87 e
88 t
89
90 b
91 a
92 s
93 e
94 s
95
96 3
97 .
98
99 V
100 i
101 e
102 w
103
104 t
105 h
106 e
107
108 n
109 u
110 m
111 b
112 e
113 r
114
115 i
116 n
117
118 a
119 l
120 l
121
122 c
123 o
124 m
125 m
126 o
127 n
128
129 b
130 a
131 s
132 e
133 s
134
135 s
136 i
137 m
138 u
139 l
140 t
141 a
142 n
143 e
144 o
145 u
146 s
147 l
148 y
149
150 4
151 .
152
153 C
154 o
155 p
156 y
157
158 a
159 n
160 y
161
162 r
163 e
164 p
165 r
166 e
167 s
168 e
169 n
170 t
171 a
172 t
173 i
174 o
175 n

Tips

0b prefix = binary, 0o = octal, 0x = hexadecimal
Hex is widely used in CSS colors, memory addresses, and encoding
Each hex digit maps to exactly 4 binary digits (nibble)

Frequently Asked Questions

What bases are commonly used?

Binary (2) for hardware/logic, octal (8) for Unix permissions, decimal (10) for humans, hexadecimal (16) for programming and colors.

Can I use bases above 16?

Yes, up to base 36 (0-9 plus A-Z). Base 36 is sometimes used for compact URL-safe identifiers.