Hexadecimal to binary converter

How to convert hexadecimal to binary

To convert hexadecimal to binary, type your number in the converter above and read the binary value. For example, D6 in hexadecimal is 1101 0110 in binary. The other bases are shown at the same time.

Why convert hexadecimal to binary

Expanding hex into binary shows exactly which bits are set, which is what you need for flags, permissions, network masks and hardware registers. D6 is 11010110: bits 7, 6, 4, 2 and 1 are on, and the rest are off.

Convert hexadecimal to binary by hand

Here is D6 (hexadecimal) converted step by step:

1. Take each hexadecimal digit separately: D 6.
2. Write each one as four bits: D = 1101, 6 = 0110.
3. Join the groups: 1101 0110.

Common bytes in hex and binary

More hexadecimal to binary examples

Check your answer

To check the result, convert it back: 1101 0110 in binary is D6 in hexadecimal. Your input may only contain the hexadecimal digits 0 1 2 3 4 5 6 7 8 9 A B C D E F; any other character is not a valid hexadecimal number.

Good to know

• Replace each hex digit with its four-bit group; do not convert the whole number through decimal.
• Leading zeros in each group matter: 6 is 0110, not 110.
• Two hex digits always give eight bits.
• The converter also shows the other bases at the same time, so a single entry gives you binary, decimal, hexadecimal and octal.