Diameter symbol (⌀)
U+2300 · DIAMETER SIGN · Unicode 1.1 (1993)
How to type ⌀
Windows
No Alt code
⌀ is not in the Windows code pages 1252 or 437, so it has no Alt code. Use one of the methods below or copy it from this page.
Word and Outlook: Alt + X
2300 Alt+X
Type 2300 and press Alt+X right after it: Word turns the code into ⌀. Press Alt+X again to turn it back into the code.
Emoji and symbols panel (Windows 10 and 11)
Win+.
Press Win + full stop (.) to open the panel, go to the Symbols tab (Ω) and pick ⌀.
No numeric keypad on your laptop? See the other ways in our Alt codes guide.
Mac
Character Viewer
Ctrl+⌘ Cmd+Space
Press Ctrl+⌘+Space (or the Globe key + E), search for “diameter symbol” and click ⌀ to insert it.
iPhone
Make a shortcut (Text Replacement)
Turn a short word into ⌀ once and type it in any app:
- Copy ⌀ from this page.
- Open Settings › General › Keyboard › Text Replacement and tap +.
- Paste ⌀ as the Phrase and type a Shortcut, for example ;diamet.
- Now type ;diamet anywhere: the keyboard suggests ⌀.
Android
Make a shortcut (Gboard personal dictionary)
Teach your keyboard a short word that turns into ⌀:
- Copy ⌀ from this page.
- Open Gboard settings › Dictionary › Personal dictionary, choose your language and tap +.
- Paste ⌀ as the word and type a shortcut, for example ;diamet.
- Type ;diamet in any app and tap ⌀ in the suggestions.
Linux
Unicode input
Ctrl+Shift+U 2300 Enter
Press Ctrl+Shift+U, type 2300 and press Enter or Space. Works in GTK apps and with IBus (GNOME, Ubuntu, Fedora).
What ⌀ means and how it is used
The diameter sign ⌀ (U+2300) appears in engineering drawings and product specs: ⌀ 20 mm. Many people type the similar letter Ø or ø instead, which is acceptable in plain text but a different character. German speakers call it Durchmesserzeichen or Durchschnittszeichen; Poles say 'fi'.
Diameter symbol (⌀) is the Unicode character U+2300, officially called DIAMETER SIGN. It is in the Miscellaneous Technical block and has been part of Unicode since version 1.1 (1993).
On this site it is part of the technical and keyboard symbols (120 symbols), next to ℡ ⌘ ⌥ ⇧ ✉.
Codes for HTML, CSS and JavaScript
Tap Copy next to the code you need.
| HTML decimal | ⌀ | |
|---|---|---|
| HTML hex | ⌀ | |
| CSS | content: "\2300"; | |
| JavaScript | \u2300 | |
| URL | %E2%8C%80 | |
| UTF-8 bytes | E2 8C 80 | |
| Unicode | U+2300 |
Will it show on my friend's phone?
⌀ has been in Unicode since version 1.1 (1993). Practically every phone, computer and app shows it.
Checking your device…
Names in other languages
What ⌀ is called in the 12 languages of this site (Unicode CLDR and our editors). Tap a name to open that language's page.
| Language | Name |
|---|---|
| English | Diameter symbol |
| Português | Símbolo de diâmetro |
| Español | Símbolo de diámetro |
| Italiano | Simbolo diametro |
| Français | Symbole diamètre |
| Deutsch | Durchschnittszeichen (Durchmesser) |
| Türkçe | Çap sembolü |
| Bahasa Indonesia | Simbol diameter |
| Polski | Symbol fi (średnica) |
| Русский | Знак диаметра |
| 日本語 | 直径記号 |
| 한국어 | 지름 기호 |
Related symbols
All Technical →Questions people ask
How do I type ⌀ on a laptop without a numeric keypad?
On Windows press Win + full stop (.) and pick ⌀ in the Symbols tab, or in Word type 2300 and press Alt+X.
How do I type ⌀ on an iPhone?
The iPhone keyboard has no key for ⌀. Copy it here, then add it in Settings › General › Keyboard › Text Replacement with a shortcut like ;diamet.
What is the HTML code for the diameter symbol?
There is no named entity; use ⌀ or ⌀. In CSS write \2300, in JavaScript \u2300.
Will ⌀ show on every phone?
⌀ has been in Unicode since version 1.1 (1993). Practically every phone, computer and app shows it.