Below is the Alt code keyboard shortcut for inserting the diameter sign. If you are new to ALT codes and need detailed instructions on how to use them, please read How to Use ALT Codes to Enter Special Characters. The Alt code for the diameter (⌀) sign on Windows systems is 8960. To enter the diameter symbol using the Alt code, hold down the Alt key and, while keeping it pressed, type 8960 using the numeric keypad. Then, release the Alt key, and the diameter symbol (⌀) should appear. On an Apple Mac US keyboard, press the Option key, and while keeping it pressed, type 2300. Please note that Alt codes may not work in all applications or with all keyboard configurations, as it depends on the specific settings and character encoding. If these methods do not work, simply copy and paste the diameter sign below.
Click the diameter sign symbol to copy:
|Windows Alt Code
|Windows Alt X Code
|2300 ALT X
|Mac Option Key Shortcut
Numeric Character Reference (Hexadecimal)
Numeric Character Reference (Decimal)
|Unicode Code Point
Meaning and Usage of the Diameter Sign ⌀
The diameter sign (⌀) is a symbol used to represent the diameter of a circle, sphere or cylindrical object. The symbol ⌀ is also known as the “Diameter symbol” or “Diameter sign.”
The diameter sign (⌀) is commonly used in technical drawings, engineering diagrams, blueprints, and other fields where the measurement of diameters is important. It is placed before or above the numerical value to indicate that the following measurement represents the diameter of a circular object.
- ⌀10 mm represents a diameter of 10 millimeters.
- ⌀2 inches represents a diameter of 2 inches.
The symbol ⌀ is used to differentiate the diameter from other linear measurements, such as length or height. It helps clarify that the measurement specifically refers to the width of a circular shape or cylindrical object.
It’s worth noting that the diameter sign (⌀) should not be confused with the following letters and symbol:
- Ø Latin capital letter O with stroke or slashed O (ALT 0216)
- ø Latin small letter o with stroke or slashed o (ALT 0248)
- ∅ Mathematical symbol for an empty set (ALT 8709)
The diameter sign (⌀) is a valuable symbol in technical fields, as it allows for clear and precise representation of circular dimensions and measurements.
The diameter sign (⌀) is a part of the set of ALT Codes for Miscellaneous Technical Symbols. For the the complete list of the ASCII based Windows ALT Codes, refer to Windows ALT Codes for Special Characters & Symbols.