🔢Number Base Converter

How to Use

1. 1

   Enter a number

   Type any integer in the input field. You can enter binary, octal, decimal, or hexadecimal values.

2. 2

   Select the input base

   Choose the base of the number you entered (2, 8, 10, or 16).

3. 3

   See all conversions

   The equivalent values in all other bases appear instantly below.

4. 4

   Copy a result

   Click the copy button next to any result to copy it to your clipboard.

FAQ

What is a number base?

A number base (or radix) defines how many unique digits are used to represent numbers. Base 10 (decimal) uses 0–9; base 2 (binary) uses 0–1; base 16 (hexadecimal) uses 0–9 and A–F.

Why do programmers use binary and hexadecimal?

Computers process data in binary (base 2) at the hardware level. Hexadecimal (base 16) is a compact shorthand — each hex digit represents exactly 4 binary bits, making it easy to read memory addresses, color codes, and byte values.

What is octal (base 8) used for?

Octal is common in Unix/Linux file permission notation (e.g., chmod 755) and older computing systems. Each octal digit represents exactly 3 binary bits.

Are negative numbers supported?

Yes. Prefix your number with a minus sign (−) and it will be converted correctly across all bases.

What are the valid characters for hexadecimal?

Hexadecimal uses digits 0–9 and letters A–F (case-insensitive). For example, the decimal value 255 is FF in hexadecimal.