Binary & Hex Converter
Convert between binary, decimal, hexadecimal and octal number systems instantly. Type in any field to convert all others.
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About This Tool
What it does
Converts between binary, decimal, hexadecimal and octal number systems instantly. Useful for programming, computer science and digital electronics.
Who it's for
Computer science students, software developers, electrical engineers and anyone working with different number systems.
Your privacy
All conversions happen in your browser. Nothing is transmitted or stored.
Frequently Asked Questions
How do I convert binary to decimal?
Enter your binary number in the converter above and the decimal equivalent appears instantly. For example: binary 1010 = decimal 10, binary 1111 = decimal 15, binary 11111111 = decimal 255. The converter also works in reverse — enter any decimal to get the binary equivalent.
How do I convert decimal to hexadecimal?
Enter your decimal number above and select Hex as the output. For example: decimal 255 = hex FF, decimal 16 = hex 10, decimal 256 = hex 100. Hexadecimal is widely used in web colours, memory addresses and programming. All conversions happen instantly with no sign up required.
What is binary used for in computing?
Binary (base 2) is the fundamental language of computers — all data is stored and processed as 0s and 1s. Hexadecimal (base 16) is used in programming, web colours (#FF5733), memory addresses and debugging. Octal (base 8) is used in Unix file permissions. This converter handles all four number systems.
What is binary?
Binary (base 2) uses only 0 and 1. It's the foundation of all digital computing — every piece of data on a computer is ultimately stored as binary. 255 in binary is 11111111.
What is hexadecimal used for?
Hexadecimal (base 16, using 0-9 and A-F) is used in programming, web colour codes (#FF5733), memory addresses, and hardware. It's a compact way to represent binary — 8 binary digits become just 2 hex digits.
How do I convert binary to decimal?
Each binary digit represents a power of 2. From right to left: 1, 2, 4, 8, 16, 32... Add the values for each 1 digit. For example, 1010 = 8 + 0 + 2 + 0 = 10.
Is the converter free?
Yes, completely free with no sign up required.
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