Binary to Hex Converter

Instantly convert binary numbers to hexadecimal (and back) with our interactive tool. Essential for programmers, electronics engineers, students, and anyone working with digital systems.
A digital display representing binary to hex conversion in programming and electronics

Binary (base-2) and hexadecimal (base-16) are core number systems in computing and electronics. Binary is the language of computers, using only 0s and 1s, while hexadecimal offers a compact way to represent large binary values, widely used in debugging, microcontroller programming, color codes, and more. Converting between these systems is a vital skill for developers, students, and electronics enthusiasts.

Binary <> Hexadecimal Converter Tool

Try: 101101 → 2D
Try: 1A3F → 0001101000111111
Quick Reference: Binary, Hex, and Decimal (0–15)
Decimal Binary (4 bits) Hex
0 0000 0
1 0001 1
2 0010 2
3 0011 3
4 0100 4
5 0101 5
6 0110 6
7 0111 7
8 1000 8
9 1001 9
10 1010 A
11 1011 B
12 1100 C
13 1101 D
14 1110 E
15 1111 F
Tip: Each hex digit equals 4 binary bits (a "nibble"). For example, A = 1010, F = 1111.

Why Convert Binary to Hex? Real-World Scenarios

  • Debugging and low-level programming: Hex is easier to read and less error-prone than long binary strings. Memory dumps, machine code, and microcontroller programming often use hex.
  • Electronics and networking: MAC addresses, color codes, and protocol data are usually shown in hex.
  • Data representation: Hex condenses binary, making it faster to spot patterns and errors.
Example: 11011010 → DA (hex), or 0xDA in C code.

Common Mistakes in Binary/Hex Conversion

  • Omitting leading zeros in binary—causes mismatched bit lengths.
  • Using invalid characters (e.g., '2' in binary, 'G' in hex).
  • Confusing bit order: Always convert left-to-right (most significant bit first).
  • Forgetting to group binary in 4s for hex conversion.
Tip: Double-check input length and make sure your binary is a multiple of 4 bits for direct hex conversion.

Binary to Hexadecimal Conversion FAQ

Group your binary number into sets of 4 bits (from right to left). Each group converts to one hex digit. For example, 10111011 1101 becomes 1011 1011 1101 (add leading zeros if needed: 0001 0111 1011 1101), then convert each group: 0001=1, 0111=7, 1011=B, 1101=D. So, binary 101110111101 → hex 17BD.

Computers operate at the level of electronic switches—on (1) or off (0)—which is binary. Hexadecimal provides a human-friendly shorthand: every hex digit represents exactly 4 binary bits, making it much easier to read or debug long binary values. For example, 11111111 (8 bits) is just FF in hex.

Add leading zeros to the left until you have a multiple of 4 bits. For example, 1011 (4 bits) is fine, but 101 (3 bits) becomes 0101. This ensures each group maps to a valid hex digit.

Replace each hex digit with its 4-bit binary equivalent. For example, 3F becomes 0011 1111. Use the quick-reference table above to look up each digit.

For unsigned numbers, convert as usual. For signed (two's complement) numbers, the leftmost bit is the sign bit. Convert as normal, but be mindful that hex doesn't indicate sign—it just represents the bits. Interpreting the value as negative or positive depends on context (e.g., 8-bit 10000000 = 0x80, which is -128 if signed, 128 if unsigned).

Double-check your input for typos (only 0/1 in binary, 0-9/A-F in hex), ensure correct grouping (4 bits per hex digit), and watch for leading zeros. For very large numbers, verify no overflow or missing digits.

This tool is for binary/hex conversion. For decimal or octal, see our Hex to Decimal Converter or Octal Converter for seamless base conversion workflows.

Related Tools & Guides

Quick Tips

  • Each hex digit = 4 binary bits
  • Use leading zeros for shorter binary (e.g., 101 → 0101)
  • Check for typos: binary is 0/1 only; hex is 0-9, A-F
  • Group binary in 4s for easy conversion