Number Base Converter

Convert any number between any bases from base 2 to base 36 — enter a value in your chosen base and see binary, octal, decimal, hex and more instantly.

What Does This Tool Do?

Convert any number between bases 2 through 36 — enter your number in any base and see the value in binary, octal, decimal, duodecimal, hexadecimal, base-20, base-32 and base-36 simultaneously.

Key Features

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8 Base Outputs
Binary to base-36, all shown at once.
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Live
Updates as you type.
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Custom Base
Convert from any base 2–36.
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Click to Copy
Click any card to copy.

How to Use

  1. Enter your number.
  2. Select the base it is currently in.
  3. All 8 common bases appear instantly.
  4. Click any result to copy it.

Frequently Asked Questions

What bases are included?▾
Binary (2), Octal (8), Decimal (10), Duodecimal (12), Hexadecimal (16), Vigesimal (20), Base-32, Base-36. Use custom to convert from any other base.
What characters are used above base 10?▾
Digits 0–9 then A–Z for values 10–35. E.g. base-16 uses 0–9 and A–F. Base-36 uses 0–9 and A–Z and can encode alphanumeric strings.
What is base 36 used for?▾
Base-36 is used for URL shorteners, case-insensitive alphanumeric codes, and compact ID generation. It encodes larger values in fewer characters than decimal or hex.