Integer Base Converter

What Is an Integer Base Converter?

An Integer Base Converter lets you convert whole numbers between any two number bases from 2 up to 64. Whether you need to switch between binary, octal, decimal, hexadecimal, or even base64, this tool handles it instantly using BigInt arithmetic so there are no overflow issues with large values.

How Does It Work?

Every number system has a base (also called radix) that determines how many unique digits it uses. Decimal (base 10) uses digits 0–9, binary (base 2) uses 0–1, and hexadecimal (base 16) uses 0–9 and A–F. The converter takes your input number, converts it to a decimal equivalent internally using BigInt, and then expresses that value in the target base.

For example, the decimal number 42 appears as 101010 in binary, 52 in octal, 2A in hexadecimal, and 2a in base36. The tool shows all these representations side by side so you can compare them at a glance.

Common Number Bases

• Binary (Base 2): Uses digits 0 and 1. Fundamental to digital electronics and computing.
• Octal (Base 8): Uses digits 0–7. Historically used in Unix file permissions and some programming contexts.
• Decimal (Base 10): Uses digits 0–9. The standard number system for everyday use.
• Hexadecimal (Base 16): Uses digits 0–9 and letters A–F. Widely used in programming for memory addresses, color codes, and binary shorthand.
• Base64 (Base 64): Uses A–Z, a–z, 0–9, +, and /. Commonly used for encoding binary data in text form (e.g., email attachments, data URIs).

How to Use the Integer Base Converter

1. Type or paste your number into the Enter Number field.
2. Select the Input Base that matches your number’s original base.
3. Choose a Custom Output Base to see the result in any base from 2 to 64.
4. The output panel instantly shows the value in binary, octal, decimal, hexadecimal, base64, and your chosen custom base.

Frequently Asked Questions