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Number Base Converter

Convert exactly between decimal, binary, octal and hexadecimal — enter a value in any base and see it in all four instantly.

Decimal
255
Binary
11111111
Octal
377
Hexadecimal
FF

How to use

  1. Choose the base your number is written in — decimal, binary, octal or hexadecimal.
  2. Type the value in that base.
  3. The number is converted to all four bases instantly.
  4. Hexadecimal digits can be typed in upper or lower case.

Example conversion

255 (decimal) = 11111111 (binary) = 377 (octal) = FF (hex)
32 (decimal)  = 100000 (binary) = 40 (octal) = 20 (hex)

FAQ

What is FF in decimal?

FF is hexadecimal for 255 — that is, 15 × 16 + 15.

How do I convert a binary number to decimal?

Pick Binary as the input base, type the binary digits (0 and 1), and the decimal value appears instantly.

Is it private?

Yes — everything runs in your browser.

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More FAQs

Are these tools free to use?

Yes, every tool is completely free, with no signup and no limits.

Do I need an account or install anything?

No. Everything runs in your browser — no install, no account.

Related searches

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