This free online number system converter instantly converts any number between binary, octal, decimal, and hexadecimal, all at once. Enter a value, pick the base it's currently in, and see every equivalent representation right away.
How to Use the Number System Converter
- Select the number system your value is currently in from the "From Base" dropdown.
- Type the value into the "Value" field, using only the digits valid for that base.
- Click "Convert" to see the equivalent binary, octal, decimal, and hexadecimal values all at once.
Frequently Asked Questions
It supports binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16), converting between all four at the same time.
Binary allows only 0-1, octal allows 0-7, decimal allows 0-9, and hexadecimal allows 0-9 plus letters A-F (for values 10-15).
Decimal 42 equals 101010 in binary, 52 in octal, and 2A in hexadecimal. Try it yourself by selecting Decimal and entering 42 above.
Yes, it's completely free, works instantly in your browser, and requires no sign-up.