Number base converter
Binary to Decimal Converter
Convert binary numbers to decimal for programming, computer science, and digital logic.
Base converter
Binary to Decimal
Convert whole numbers between decimal, binary, hexadecimal, and octal.
Binary input can use only 0 and 1.
Result
10
Binary (base 2) to Decimal (base 10)
How Binary to Decimal Conversion Works
Binary uses base 2, while Decimal uses base 10. The converter first reads the input value in base 2, then writes the same whole number in base 10.
This tool supports whole numbers within JavaScript's safe integer range. Binary output is grouped in blocks of four digits so long results are easier to read.
Example Conversions
| Binary | Decimal |
|---|---|
| 1010 | 10 |
| 1111 | 15 |
| 1010 1101 | 173 |
| 10000000 | 128 |
FAQ
What does Binary to Decimal Converter do?
It converts a whole number written in Binary (base 2) into Decimal (base 10).
Is Binary to Decimal conversion exact?
Yes. Number base conversion rewrites the same whole number in another base, so the value itself does not change.
Can I use spaces in binary or hex input?
Yes. Spaces are ignored, so grouped binary like 1010 1101 is accepted.
Is this converter private?
Yes. The conversion runs locally in your browser and does not need a database or paid API.