Number Base Converter

Convert numbers between binary, octal, decimal, hexadecimal, and any base (2-36). Supports BigInt.

Input base:
Custom:
Additional output base:(2-36)
Binary0b1111 1111
Octal0o377
Decimal255
Hexadecimal0xff
Base 327v

Number Info

Decimal Value

255

Bit Length

8

Byte Size

1

Hex Length

2

How to Convert Number Bases Online

  1. 1.Select the input base (BIN, OCT, DEC, HEX, or custom).
  2. 2.Type or paste your number.
  3. 3.View real-time conversions in all bases.
  4. 4.Toggle prefixes, digit grouping, or uppercase.
  5. 5.Hover and click Copy.

Frequently Asked Questions

What bases are supported?

All bases from 2 to 36.

Can I convert very large numbers?

Yes! Uses BigInt for arbitrary precision.

What do 0b, 0o, 0x mean?

0b = binary, 0o = octal, 0x = hexadecimal. Standard programming prefixes.

What is digit grouping?

Spaces between digit groups for readability: binary by 4, octal by 3, decimal by 3, hex by 2.