ASCII 165
Yen Sign (¥)
Latin-1 Supplement
Latin-1 character.
Common uses & context
Decimal 165 (0xA5) is Yen Sign, part of the Latin-1 Supplement (128–255). Latin-1 character. It renders as '¥' and its binary byte is 10100101.
This is where single-byte ASCII ends and encoding matters. In Latin-1 (ISO-8859-1) '¥' is the single byte 0xA5. In UTF-8 — today's default for the web — the same character is the multi-byte sequence 0xC2 0xA5. Treating a Latin-1 byte as UTF-8 (or vice versa) is the usual reason accented letters and symbols turn into mojibake like é or €. The Unicode code point is U+00A5, and in HTML you can write it as ¥ or ¥.
All encodings at a glance
| Decimal | 165 |
| Hexadecimal | 0xA5 |
| Octal | 0245 |
| Binary | 10100101 |
| HTML numeric entity | ¥ |
| HTML named entity | ¥ |
| URL encoding | %A5 |
| UTF-8 bytes | 0xC2 0xA5 |
Code snippets
JavaScript
String.fromCharCode(165); // "¥"
165.toString(16); // "a5"Python
chr(165) # control char ¥
ord(chr(165)) # 165
hex(165) # '0xa5'HTML
¥ <!-- named entity -->
¥ <!-- numeric entity -->Programming notes
- ▸Single byte 0xA5 in Latin-1, but the multi-byte sequence 0xC2 0xA5 in UTF-8 — never assume one byte per character above code 127.
- ▸Unicode code point U+00A5; HTML entity ¥.
- ▸If '¥' shows as mojibake, the encoding declared and the encoding used disagree — align both on UTF-8.
Unicode & UTF-8 note
In Unicode this is U+00A5. In UTF-8 it encodes to the byte sequence 0xC2 0xA5. In legacy Latin-1 (ISO-8859-1) it is a single byte 0xA5, which is why Latin-1 files often appear as mojibake when interpreted as UTF-8.
Frequently asked questions
What character is ASCII code 165?
ASCII code 165 is the character '¥' (Yen Sign). In hexadecimal it is 0xA5, in octal 0245, and in binary 10100101.
What is 0xA5 in ASCII?
Hexadecimal 0xA5 equals decimal 165, which is the character '¥' (Yen Sign). To convert hex to ASCII yourself, read the two hex digits as a base-16 number (0xA5 = 165) and look up that code point.
How do I write the character with code 165 in code?
In JavaScript use String.fromCharCode(165); in Python use chr(165); in HTML use the numeric entity ¥ or the named entity ¥. In a URL it is percent-encoded as %A5, and in UTF-8 it is stored as the byte sequence 0xC2 0xA5.
Is '¥' part of standard ASCII?
No. Standard ASCII covers codes 0–127 only. '¥' is code 165, part of the Latin-1 Supplement (128–255, sometimes called "extended ASCII"). It is a single byte 0xA5 in Latin-1 but a multi-byte sequence (0xC2 0xA5) in UTF-8.