Mathematical Double-struck Capital O Symbol
π is the Mathematical Double-Struck Capital O character (U+1D546).
U+1D546
π (U+1D546) is a double-struck, capital letter O used in specialized text. Itβs common in mathematical notation where a distinctive βOβ glyph is needed. Use it for copy/paste in documents, web pages, and design mockups.
Mathematical Double-struck Capital O Symbol Meaning
π is Unicodeβs βMATHEMATICAL DOUBLE-STRUCK CAPITAL Oβ (U+1D546). The double-stroke styling distinguishes it from the regular Latin capital O and from other mathematical O variants. In practice, itβs most often used in mathematical contexts where authors want a specific symbol appearanceβsuch as labeling sets or operators in notation conventions, or writing text that must match a particular font style. Because it belongs to the Mathematical alphanumeric symbols block, appearance depends on the font youβre using. If your font doesnβt support it, you may see a fallback or missing glyph.
Common uses
- β’Typing mathematical notation that requires the double-struck βOβ glyph
- β’Labeling variables or symbols in math-heavy documents and worksheets
- β’Designing posters or slides that include specialized mathematical typography
- β’Creating consistent symbol styling in academic writing templates
- β’Using the character in UI/mockups where a specific mathematical letterform is required
Examples
π Mathematical Double-Struck Capital O
- πLet π be a set of outcomes.
- πDefine π as the set of integers with a chosen property.
- πWe consider π under the given operation.
- πThe symbol π appears in the second equation.
- πFont check: verify π renders correctly in your document.
Variations
Ready to copy
Technical codes
| Unicode | U+1D546 | |
| HTML Entity | 𝕆 | |
| HTML Code | 𝕆 | |
| CSS | \1D546 | |
| Decimal | 120134 |
How to type Mathematical Double-struck Capital O Symbol (π)
On Windows
In Word, type 1D546 then press Alt + X. Or open the emoji picker with Windows key + period.
On Mac
Press Control + Command + Space to open Character Viewer and search for the character.
On Linux
Press Control + Shift + U, type 1d546, then press Enter or Space.
Anywhere
Copy π with the button above and paste it wherever you need it β this works on every device and in every app, with no keyboard shortcut to remember.
FAQ
What does the Mathematical Double-struck Capital O symbol mean?
π is Unicodeβs βMATHEMATICAL DOUBLE-STRUCK CAPITAL Oβ (U+1D546). The double-stroke styling distinguishes it from the regular Latin capital O and from other mathematical O variants. In practice, itβs most often used in mathematical contexts where authors want a specific symbol appearanceβsuch as labeling sets or operators in notation conventions, or writing text that must match a particular font style. Because it belongs to the Mathematical alphanumeric symbols block, appearance depends on the font youβre using. If your font doesnβt support it, you may see a fallback or missing glyph.
How do I type or copy π?
Copy it directly from this page, or use its Unicode code point U+1D546 (HTML: 𝕆, CSS escape: \\1D546, JavaScript: \\u{1D546}).
Why does π look different from a normal capital O?
π is a double-struck mathematical glyph. Its stylized stroke gives it a distinct appearance compared to the regular Latin capital O.
Will π display correctly on all devices?
It depends on font support for the Mathematical alphanumeric symbols block. If a font lacks the glyph, you may see a fallback character.
Can I use π in HTML or CSS?
Yes. For example, use HTML entity 𝕆 or CSS escape \\1D546 to include the character reliably when supported.