Free Binary to Decimal Converter

Free tool · nothing is uploaded

Free binary to decimal converter

Type a binary, decimal, or hexadecimal number. The other two update. 255 is 11111111 in binary and FF in hex. The text stays in your browser.

The decimal number 255 shown as binary 11111111 and hexadecimal FF.
The picture uses 255. The form below converts any whole number up to 64 bits.

0 to 18446744073709551615

Digits 0 and 1. Spaces are ignored.

0–9 and A–F

The text stays in this browser.

How the conversion works

  1. Each binary digit is a power of 2, starting at 1 on the right. 11111111 is 255. 1010 is 10.
  2. Hex uses 0 to 9 and then A to F. A is 10 and F is 15. 255 is FF. 1000 is 3E8.
  3. 1000 in decimal is 1111101000 in binary.
  4. The largest value is 18446744073709551615. That is 64 ones in binary and FFFFFFFFFFFFFFFF in hex.
  5. A comma in the decimal field is a thousands separator, so 1,000 is 1000. Spaces in binary are ignored.

This converts whole numbers. It does not turn a word into bits. Zero is 0 in every base.

Questions about this converter

How do you convert binary to decimal?

Each binary digit is a power of 2, starting at 1 on the right. 11111111 is 255. 1010 is 10.

How do you convert decimal to hexadecimal?

Hex uses 0 to 9 and then A to F. A is 10 and F is 15. 255 is FF. 1000 is 3E8.

How long can the number be?

Up to 64 bits. The largest value is 18446744073709551615, which is 64 ones in binary and FFFFFFFFFFFFFFFF in hex.

Does this tool upload the number?

No. The text stays in the browser. Blogoose does not receive it.