Number Base Converter

Enter a number in any base to convert

Binary (Base 2)

BIN

Octal (Base 8)

OCT

Decimal (Base 10)

DEC

Hexadecimal (Base 16)

HEX

Bit visualization (32-bit)

Quick Info

Signed 32-bit

—

Bit count (popcount)

—

Bit length

—

Byte (hex pairs)

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How to Use

Type a number in any base field (binary, octal, decimal, or hex)

All other bases update instantly as you type

Click Copy to copy any result to clipboard

How to Use Number Base Converter

Enter a number

Type a number in any base: binary (base 2), octal (base 8), decimal (base 10), or hexadecimal (base 16).

Select the input base

Choose the base of the number you entered.

See all conversions instantly

The tool instantly shows the equivalent value in all other bases simultaneously.

Copy any result

Click Copy next to any result to copy that value to your clipboard.

Use Cases

Programming and bit manipulation

Developers working with bitwise operations, flags, and masks convert frequently between binary, decimal, and hexadecimal.

Color code conversion

Hexadecimal is used for HTML/CSS color codes. Convert hex color values to decimal components for use in programming.

Networking and IP addresses

Network engineers convert IP address components and subnet masks between decimal and binary for subnetting calculations.

Memory address debugging

Embedded systems and low-level programmers read and convert memory addresses between hex and decimal representations.

Computer science education

Students learning number systems practice converting between bases as a fundamental computer science concept.

Frequently Asked Questions

Q: What bases are supported?

Binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16).

Q: Can it handle negative numbers?

The tool handles positive integers. Negative number representation (two's complement) is not currently displayed.

Q: How large a number can it convert?

The tool uses JavaScript's BigInt for large numbers, handling values far beyond 32-bit integer limits.

Q: What does hexadecimal A–F represent?

In hex: A=10, B=11, C=12, D=13, E=14, F=15. These letters represent single-digit values above 9.

Q: Is my input sent anywhere?

No. All conversion happens in your browser using JavaScript. No data leaves your device.

How to Use

How to Use Number Base Converter

Features

Use Cases

Programming and bit manipulation

Color code conversion

Networking and IP addresses

Memory address debugging

Computer science education

Frequently Asked Questions

Q: What bases are supported?

Q: Can it handle negative numbers?

Q: How large a number can it convert?

Q: What does hexadecimal A–F represent?

Q: Is my input sent anywhere?

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