Binary to Decimal Converter
Convert binary to decimal online for free — paste a binary number and get the decimal value plus hex and octal. Instant, no upload.
Not a base-2 number: 255
Enter a number to see it in all bases.
About Binary to Decimal Converter
Type or paste a binary number — with or without the 0b prefix — and the decimal value appears instantly, alongside the hex and octal equivalents. Negative numbers and arbitrarily long values work too.
The binary base is preselected for you on this page; switch it if your input is decimal, hex or octal instead. Conversion runs locally in your browser — nothing is uploaded.