Number Base Converter

Convert integers between binary, octal, decimal, and hexadecimal with precise BigInt support.

Convert a number

Select the input base and convert your integer into all four number systems.

Input base

Number to convert

Digits 0–9 · Signed whole numbers are supported.

Try an example

Base 2 · Digits 0–1

Commonly used in digital systems and bitwise operations.

Base 8 · Digits 0–7

Sometimes used for Unix file permissions.

Base 10 · Digits 0–9

The standard number system used in everyday arithmetic.

Base 16 · Digits 0–9, A–F

Widely used in programming, memory addresses, and color codes.

This tool converts whole numbers, including large integers. Fractions and floating-point numbers are not supported.