Number Base Converter
Enter a number and pick its base; it instantly shows the same value in binary, octal, decimal and hexadecimal.
Binary (2)
11111111
Octal (8)
377
Decimal (10)
255
Hexadecimal (16)
FF
211111111
3100110
43333
52010
61103
7513
8377
9313
10255
11212
12193
13168
14143
15120
16FF
17F0
18E3
19D8
20CF
21C3
22BD
23B2
24AF
25A5
269L
279C
2893
298N
308F
3187
327V
337O
347H
357A
3673
About
Used for base conversions like turning a hex color into decimal, or a binary number into decimal and back. Common in programming, digital electronics and computer-science courses.
Conversion happens entirely in your browser; your data is never sent out.
How to use
- Pick the base of the number you'll enter (decimal, binary, octal, hex).
- Type the number.
- See and copy its equivalents in every base.
Frequently Asked Questions
- Are hex letters upper or lower case?
- Input accepts either case; the result is shown in upper case (e.g. 1A3F).
- Are negative or decimal numbers supported?
- This tool is designed for positive integers; base conversions are done on whole numbers.
Other tools
Embed this tool
Copy the code below and paste it into your site's HTML to embed this tool for free. The snippet includes an attribution link back to the source.
<iframe src="https://tooldict.com/embed/en/number-base-converter" title="Number Base Converter" width="100%" height="600" style="border:1px solid #e2e8f0;border-radius:16px;max-width:680px" loading="lazy"></iframe>
<p style="font:13px/1.5 sans-serif">Powered by <a href="https://tooldict.com/en/number-base-converter" target="_blank" rel="noopener">Number Base Converter</a> — Tooldict</p>