Number Base Converter | Binary Hex Decimal Tool

Input Number:

From Base:

Converting...

About Number Base Converter

Convert numbers between different numeral systems including binary, octal, decimal, and hexadecimal. Essential for programmers, computer science students, and anyone working with different number representations.

Number Base Systems

Binary (Base 2)

Uses digits: 0, 1
Example: 1010 = 10₁₀

Octal (Base 8)

Uses digits: 0-7
Example: 12 = 10₁₀

Decimal (Base 10)

Uses digits: 0-9
Standard counting system

Hexadecimal (Base 16)

Uses: 0-9, A-F
Example: A = 10₁₀

Frequently Asked Questions

What are number bases?

Number bases are different ways to represent numbers. Binary (base 2) uses only 0s and 1s, while hexadecimal (base 16) uses 0-9 and A-F.

Why do programmers use different bases?

Binary represents how computers store data, hexadecimal is compact for representing large binary numbers, and octal was popular in older computer systems.

How do I read hexadecimal numbers?

In hex, A=10, B=11, C=12, D=13, E=14, F=15. So FF in hex equals 255 in decimal (15×16 + 15 = 255).

What's the largest number I can convert?

JavaScript can safely handle integers up to 2^53-1 (9,007,199,254,740,991). Larger numbers may lose precision in conversion.