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Number Base Converter - Binary Hex Decimal

Convert number bases online for free. Change between binary, decimal, hex, and octal. Programmer's calculator.

Base Conversion Calculator

Convert numbers across any base (2–64)

Input

Output

Result will appear here

Quick Reference

Binary (Base 2)

Uses: 0, 1

Example: 1010 = 10 in decimal

Hexadecimal (Base 16)

Uses: 0-9, A-F

Example: FF = 255 in decimal

What This Tool Does

Convert between bases 2 to 64
Support for binary, octal, decimal, hex
Instant conversion with live results
Shows result in all bases simultaneously
Handles large numbers efficiently

How to Use

1
Select input base
Choose source number system (2-64)
2
Enter number
Type number in selected base
3
Select output base
Choose target number system
4
Convert
See result in all bases

How it works

1

Select input base

Choose source number system (2-64)

2

Enter number

Type number in selected base

3

Select output base

Choose target number system

4

Convert

See result in all bases

Use Cases

Converting hex colors to decimal RGB
Binary to decimal for computer science
Hexadecimal for memory addresses
Base64 encoding for data transmission
Learning numeral systems and math

Frequently Asked Questions

What is base conversion?

Converting a number from one numeral system (like binary) to another (like decimal).

Why use different bases?

Binary (base 2) for computers, hex (base 16) for compact representation, decimal (base 10) for humans.

What is hexadecimal?

Base 16 system using 0-9 and A-F. Common in programming for colors (#FF0000) and memory addresses.

Can I convert fractions?

This tool handles integers. For fractional conversions, use specialized decimal/binary converters.