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Number Base Converter
Convert numbers between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16). Free number system converter.
Enter a value in any field — all others update instantly.
Binary (Base 2)
Decimal (Base 10)
Hexadecimal (Base 16)
Octal (Base 8)
8-bit Representation
1
1
1
1
1
1
1
1
128
64
32
16
8
4
2
1
How to Use the Number Base Converter
Enter your values above for an instant result. This tool uses verified formulas and is optimised for users in USA, Canada, UK, Australia. All calculations happen in your browser — your data is never sent to our servers.
Frequently Asked Questions
How do you convert decimal to hexadecimal?
Divide by 16 repeatedly, collect remainders. Decimal 255: 255÷16=15 R15 → FF in hex (F=15).