Number System Conversion Tool

Number Tutor

Convert any number

Binary (2) Octal (8) Decimal (10) Hexadecimal (16) Binary (2) Octal (8) Decimal (10) Hexadecimal (16)

✨ Enter a number and click Convert

Binary Visualizer

Enter a binary number to visualize

Theory & Reference

Binary (Base 2) – 0,1  ·  Octal (Base 8) – 0–7  ·  Decimal (Base 10) – 0–9  ·  Hexadecimal (Base 16) – 0–9,A–F

Why computers use binary – two-state devices (on/off).

Bits, Bytes, Nibble, Word – 1 bit, 8 bits, 4 bits, 16/32/64 bits.

Signed vs Unsigned, Two's complement, One's complement, BCD, Gray code, Excess-3.

Applications – digital logic, networking, memory addressing, ASCII/Unicode.

Binary (2⁰…2⁷)

128 64 32 16 8 4 2 1

Octal (8⁰…8³)

512 64 8 1

Decimal (10⁰…10³)

1000 100 10 1

Hex (16⁰…16³)

4096 256 16 1

Practice Mode

Click "Generate" for a random question.

Quiz Mode

Start the quiz!

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Conversion History

⚡ Number System Tutor · Advanced conversion with steps