10進数から2進数

Convert decimal numbers to binary, hex, and octal.

10進数
Valid: 0-9 (integers)
2進数
16進数
—
8進数
—
クイックリファレンス
0→0
1→1
2→10
4→100
8→1000
16→10000
32→100000
64→1000000
128→10000000
255→11111111
256→100000000

Decimal to Binary Converter

This tool converts decimal (base 10) numbers to binary (base 2), and also shows hex and octal equivalents.

The conversion runs locally in your browser.

How to use

  1. Type or paste a decimal number into the input field.
  2. Click Convert to see the binary, hex, and octal results.
  3. Use Copy to copy the result.

What is Decimal to Binary?

Converting decimal to binary is fundamental in computer science and digital electronics.

Input notes

Enter a valid decimal number (integer).

Example

Converting decimal to binary:

--- Decimal Input ---
255

--- Binary ---
11111111

--- Hex ---
FF

--- Octal ---
377