What Does 01111001 Mean in Binary?
01111001 is the lowercase letter y in ASCII and UTF-8. In decimal it is 121, and in hex 79.
- Character
- y
- Decimal
- 121
- Hex
- 79
01111001 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 |
| 1 | 2to the power of 5 = 32 | 32 |
| 1 | 2to the power of 4 = 16 | 16 |
| 1 | 2to the power of 3 = 8 | 8 |
| 0 | 2to the power of 2 = 4 | 0 |
| 0 | 2to the power of 1 = 2 | 0 |
| 1 | 2to the power of 0 = 1 | 1 |
64 + 32 + 16 + 8 + 1 = 121
Decode more binary
The converter starts with 01111001. Add more bytes to decode a whole message.
Binary to text
| Binary | Dec | Hex | Char |
|---|---|---|---|
| 01111001 | 121 | 79 | y |
Uppercase and lowercase
The capital Y is 01011001, which is 89: 32 less than y. Only the third bit from the left changes.
Frequently asked questions
What letter is 01111001 in binary?
01111001 is the lowercase letter y. Its place values add up to 121, and 121 is y in the ASCII table.
What is 01111001 in decimal and hex?
01111001 is 121 in decimal and 79 in hex. The first four bits, 0111, make the hex digit 7, and the last four, 1001, make 9.
Is 01111001 the same in ASCII and UTF-8?
Yes. UTF-8 keeps every ASCII code from 0 to 127 as a single byte, so 01111001 is y in both.