Number Base Converter Online – Free Base 2–36 Calculator

What Is Number Base Converter?

Number Base Converter is a free online calculator that converts numbers between binary (2), octal (8), decimal (10), hexadecimal (16), and any custom base from 2 to 36. It supports integers, uppercase/lowercase hex, negative values, and real-time validation.

How It Works

1. Enter a number in the input box.
2. Select the source base (2–36).
3. Select the target base (2–36).
4. Click Convert to get the result instantly.
5. Copy the result with one click.

Key Features

• Convert between any base 2–36
• Support binary, octal, decimal, hexadecimal quick select
• Case-insensitive for hex (a-f / A-F)
• Support negative integers
• Real-time input validation
• One-click copy result
• Clear and reset buttons
• Load example function
• 100% free, no login required
• Mobile-friendly and fully responsive
• Local calculation, no data uploaded

Common Use Cases

• Programming and coding (binary/hex conversions)
• Computer science learning and teaching
• Digital electronics and embedded development
• Memory address and color code debugging
• Network configuration and data analysis
• Math education and exam preparation

How to Use

1. Open the Number Base Converter tool.
2. Type the number you want to convert.
3. Choose input base and output base (2–36).
4. Click Convert, then copy the result.

Note

This tool supports integers only. All calculations are done locally in your browser for speed and privacy.