Binary to Hex Converter
Convert binary numbers to hexadecimal and back. Used in programming, digital electronics, and computer science.
Reviewed October 7, 2026 Runs in your browser — inputs are never stored
Hexadecimal
2A
Decimal: 42
This tool provides general unit conversions for everyday and educational use. For regulated, legal, or scientific applications, verify conversion factors against the applicable official standard.
About the Binary to Hex Converter
The binary to hex converter changes binary numbers to hexadecimal and back. Each hexadecimal digit corresponds to exactly four binary digits, so the conversion is done by grouping bits in fours from the right. Hexadecimal is the usual way programmers write binary data, colours and memory addresses.
How to use it
- 1Choose binary → hex or hex → binary.
- 2Enter the number.
- 3Read the result.
- 4Copy, share or print the result with the buttons below it.
Worked example
101010 → 0010 1010 → 2A in hex. Hex FF is 1111 1111 in binary.
How it works
Method
Group binary digits into groups of 4 from right to left, then convert each group to a hex digit (0–F).
Example: 101010 → 0010 1010 → 2A (hex).
Common use cases
- Programming and debugging
- Reading register and bit-field values
- Digital electronics
Frequently asked questions
A:11111111 binary = FF hexadecimal = 255 decimal.
A:Hexadecimal is more compact: 8 binary digits = just 2 hex digits, making it easier to read memory addresses and color codes.
Reviewed for accuracy · Last updated October 7, 2026
Conversion factors are based on internationally defined SI units and standard metric/imperial equivalence tables.
CalcWisee Editorial Team
Calculator development and formula review
CalcWisee is an independent site founded by Ayman. Every calculator is built from a published formula or official definition, tested against hand-worked examples before it goes live, and corrected promptly when a reader reports an issue to ayman@calcwisee.com.
Expertise: Financial mathematics, Health and fitness formulas, Applied mathematics, Unit conversion standards
References & sources
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