Number Base Converter Pro
Convert numbers between any bases 2–36 with arbitrary precision, negatives, and floating point support.
About this tool
A comprehensive number base converter that handles bases 2 through 36. Enter a number in any base and instantly see its representation in all other common bases simultaneously. Supports arbitrary-precision integers, negative numbers, and floating-point binary fractions. Binary output is grouped into nibbles (4 bits) and bytes (8 bits) for easy reading. Step-by-step conversion working is shown for base-10 ↔ base-2 to help you learn the algorithm.
How to use
- 1 Select the input base using the dropdown or type a custom base (2–36).
- 2 Type your number in the input field. Use A–Z for digits above 9.
- 3 All output bases update instantly. Toggle negative with the ± button.
- 4 For floating-point, include a decimal point (e.g. 3.14 in base 10).
- 5 Click 'Show Steps' to see the base-10 ↔ base-2 conversion working.
Frequently Asked Questions
Convert numbers between binary, octal, decimal, and hexadecimal — instantly with bitwise breakdown.
Convert numbers between standard, scientific, engineering, and E-notation with significant-figure rounding.
Convert plain text to binary, hexadecimal, octal, or decimal — and back — with a per-character breakdown.