What Does 01010101 Mean in Binary?
01010101 is the capital letter U in ASCII and UTF-8. In decimal it is 85, and in hex 55.
- Character
- U
- Decimal
- 85
- Hex
- 55
01010101 step by step
Each 1 switches on its place value. Add the place values of the 1s to get the ASCII code.
| Bit | Place value | Value |
|---|---|---|
| 0 | 2to the power of 7 = 128 | 0 |
| 1 | 2to the power of 6 = 64 | 64 |
| 0 | 2to the power of 5 = 32 | 0 |
| 1 | 2to the power of 4 = 16 | 16 |
| 0 | 2to the power of 3 = 8 | 0 |
| 1 | 2to the power of 2 = 4 | 4 |
| 0 | 2to the power of 1 = 2 | 0 |
| 1 | 2to the power of 0 = 1 | 1 |
64 + 16 + 4 + 1 = 85
Decode more binary
The converter starts with 01010101. Add more bytes to decode a whole message.
Binary to text
| Binary | Dec | Hex | Char |
|---|---|---|---|
| 01010101 | 85 | 55 | U |
Uppercase and lowercase
The lowercase u is 01110101, which is 117: 32 more than U. Only the third bit from the left changes.
Frequently asked questions
What letter is 01010101 in binary?
01010101 is the capital letter U. Its place values add up to 85, and 85 is U in the ASCII table.
What is 01010101 in decimal and hex?
01010101 is 85 in decimal and 55 in hex. The first four bits, 0101, make the hex digit 5, and the last four, 0101, make 5.
Is 01010101 the same in ASCII and UTF-8?
Yes. UTF-8 keeps every ASCII code from 0 to 127 as a single byte, so 01010101 is U in both.