Binary to Hex Converter

Use this binary to hex converter to turn any string of 0s and 1s into its hexadecimal form in one click: type your bits, hit the Convert button, and get a clean hex value back. Because every group of four binary digits maps to exactly one hex symbol, a long binary string shrinks to a quarter of its length, and the sections below show you how to get the same answer by hand.

Binary to Hex Converter: Type Bits, Read Hexadecimal

This free online tool is built for quick checks. Paste a binary number such as 1011011101010011, press the Convert button, and the answer B753 appears live beside it. The converter reads your digits from the right, works through them four at a time, and prints the matching symbols from left to right with no rounding at all, because a base-2 value always converts exactly into base-16.

Treat the binary to hex conversion tool as a calculator for your own manual work: it gives you the final answer, while the rest of this page explains why that answer is right. Any binary to hexadecimal converter follows the same rule, so once you understand it, you can check the result yourself. The input length is effectively unlimited, and the accuracy never drops, since grouping bits loses no information.

• Enter binary digits only: 0 and 1, with optional spaces to keep long strings readable.
• Expect a hexadecimal result built from 0-9 and A-F.
• Use the same value in the other direction to confirm the answer returns your original input.

Step-by-Step: How to Convert Binary to Hex

Follow this step-by-step method whenever you want to convert without a tool:

1. Write the binary number and split it into a group of four, then the next group, and so on, starting at the rightmost position.
2. If the leftmost group is short, add zeros on its left until it holds four bits.
3. Write the weights 8, 4, 2 and 1 under each group.
4. Add up only the weights that sit under a 1, giving a number from 0 to 15 for each group.
5. Replace every sum with its hex symbol (10 becomes A, 11 becomes B, up to 15 becoming F) and keep the original order.

Leading Zeros and Padding

Leading zeros are the most common source of confusion. Adding them on the left never changes a value, so 110 and 0110 are both 6, but you must add them before you split the groups so that the grouping lines up with the right edge. Manual errors almost always come from splitting from the left instead.

Worked Conversion Examples With Hex Results

These conversion examples use fresh values so you can follow each move. Start with 1011011101010011, which is sixteen bits and splits cleanly into four groups.

Joined in order, the result is (B753)₁₆. To verify it, expand the hex value back into a decimal equivalent:

$$11 \times 16^{3} + 7 \times 16^{2} + 5 \times 16^{1} + 3 \times 16^{0} = 46{,}931$$

That matches the decimal reading of the original binary string, so the answer passes your double-check.

Now try an odd length: 11010110111 has eleven digits. Split from the right to get 110, 1011 and 0111, add one zero to the short group to make 0110, and the groups become 6, B and 7. So (11010110111)₂ = (6B7)₁₆, which is 1,719 in decimal.

Binary Fractions and Rounding

To convert a binary fraction into hex, follow the same rule, but you group outward from the point in both directions. For 1101.01101 the whole part is already one nibble, while the fractional part 01101 needs zeros on its right, not its left, giving 0110 1000. The result is D.68. Rounding only matters when a fractional part does not end cleanly, and for binary fractions entered in base 2 it ends cleanly every time.

Reading a Sensor Status Register in Hex

Dariusz Wolak is bringing up a temperature sensor board, and his logic analyzer captures the 16-bit status register as 1100101001110100. The datasheet lists every flag as a hex mask, so he needs the register in hexadecimal before he can compare anything.

He splits the capture into four groups, starting at the low end: 1100, 1010, 0111 and 0100. Dropping the full string into the converter returns CA74 as the hexadecimal reading of that register, which matches his hand check of C (12), A (10), 7 and 4. In decimal that is 51,828, the figure his logging script prints, so the two tools agree.

Now the useful part. The datasheet defines the over-temperature fault as mask 0x4000, and the converted top digit C is 1100, so the 0x4000 flag is set: the sensor is reporting over-temperature.

After a one-minute power-down, the recapture 1000101001110100 converts to 8A74. The leading digit has dropped from C to 8 and the 0x4000 mask no longer matches, which confirms the fault was thermal. Comparing in hex took seconds; comparing sixteen raw bits by eye would not have shown which flag changed.

Hex Conversion in Code and Real Systems

Python, Java and JavaScript

Every major language can do this in one line. In Python, wrap the string in int(..., 2) and pass it to hex(); JavaScript uses parseInt followed by toString(16); Java combines Integer.parseInt with Integer.toHexString:

hex(int("1011011101010011", 2))
parseInt("1011011101010011", 2).toString(16).toUpperCase()
Integer.toHexString(Integer.parseInt("1011011101010011", 2))

All three return the B753 you calculated by hand, though Python and Java print it in lowercase.

ASCII Text and Octal

ASCII text converts to hex one character at a time, so the text "Hi" is 01001000 01101001, which converts to 48 69. Octal groups three bits instead of four, which is why hex fits byte-aligned data more neatly.