Math & Numbers
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal instantly.
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Binary
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Octal
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Decimal
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Hexadecimal
Convert numbers between any numeral bases: binary (base 2), octal (base 8), decimal (base 10), hexadecimal (base 16), or any custom base from 2 to 36. Essential for programmers, students, and anyone working with computer science concepts.
Features
Binary (Base 2)
Convert to/from 0s and 1s.
Octal (Base 8)
Convert to/from base-8 representation.
Decimal (Base 10)
Standard number system.
Hexadecimal (Base 16)
Convert to/from 0-9 and A-F notation.
How to Convert Number Bases
- Enter your number in the source base field.
- Select the source base (e.g., Decimal).
- The equivalent values in all other bases appear instantly.
FAQ
Why do programmers use hexadecimal?▾
Hex is compact — one hex digit represents 4 bits, making it easier to read binary data like memory addresses and color codes.
What does 0xFF mean?▾
It's hexadecimal for 255 in decimal, or 11111111 in binary. Commonly used in color codes and bit masks.
Quick Reference
- Decimal 255 = Binary 11111111
- Decimal 255 = Hex FF
- Decimal 255 = Octal 377
- Hex colors use base 16: #FF5733
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