ASCII code for uppercase O
79
Capital letter O — O
| Decimal | 79 |
| Hexadecimal | 0x4F |
| Octal | 0117 |
| Binary | 01001111 |
| HTML entity | O |
What it is
Capital letter O is one of the 95 printable ASCII characters, the set every text encoding in common use still agrees on. UTF-8 encodes it as the single byte 79, which is why ASCII text is also valid UTF-8.
The full entry
ASCII 79 in full — the code point page, with what sits either side of it and how the character is encoded elsewhere.
Frequently asked questions
What is the ASCII code for uppercase O?
The ASCII code for uppercase O is 79 in decimal, 0x4F in hexadecimal and 0117 in octal.
What is uppercase O in binary?
01001111 — eight bits, though ASCII only defines seven, so the top bit is always zero.
Is uppercase O a printable character?
Yes. Capital letter O is in the printable range, codes 32 to 126, which is everything ASCII can put on a screen.
Other characters
- ASCII code for uppercase P — 80
- ASCII code for uppercase Q — 81
- ASCII code for uppercase R — 82
- ASCII code for uppercase S — 83
- ASCII code for uppercase T — 84
- ASCII code for uppercase U — 85
- ASCII code for uppercase V — 86
- ASCII code for uppercase W — 87
- ASCII code for uppercase X — 88
- ASCII code for uppercase Y — 89
- ASCII code for uppercase Z — 90
- ASCII code for left bracket — 91
Every character by name · The ASCII table · Text to binary converter