To learn how to type a pi symbol (π), how to type a backwards k (Ʞ), or how to type delta (Δ or δ), use the character itself, a Unicode shortcut, or a character picker. These are text characters, so you can copy them into a document, message, or search box.
How to Type a Pi Symbol (π) on Desktop and Mobile
π is the Greek small letter pi, Unicode U+03C0. A standard keyboard usually has no dedicated pi key.
- Windows: In Microsoft Word or Outlook, type 03C0, then press Alt+X. In any Windows app, open Character Map by pressing Win+R, entering charmap, and selecting π.
- Mac: Press Option+P to enter π. You can also press Control+Command+Space, search for “pi” in Character Viewer, and double-click the symbol.
- Linux: In many applications, press Ctrl+Shift+U, type 03c0, and press Enter.
- iPhone or Android: Add a Greek keyboard in your keyboard settings, switch to it, and tap π. If you do not want another keyboard layout, copy π from the fallback list below.
How to Type a Backwards K (Ʞ), Not a Rotated Image
Ʞ is the Unicode character LATIN CAPITAL LETTER TURNED K, U+A7B0. It is the character you need for a backwards K, not a rotated image of K and not baseball scorekeeping notation.
- Windows Word or Outlook: Type A7B0, then press Alt+X. In other Windows apps, use Character Map and copy Ʞ.
- Mac: Open Character Viewer with Control+Command+Space, search for “turned K,” and select Ʞ.
- Linux: In supported apps, press Ctrl+Shift+U, type a7b0, and press Enter.
- Phones: iPhone and Android keyboards normally have no dedicated key for Ʞ. Copy it, or create a text replacement such as ;bk.
How to Type Delta (Δ and δ) in Documents and Apps
Δ is Greek capital letter delta, U+0394. δ is Greek small letter delta, U+03B4. Use Δ for uppercase text and δ for lowercase text. The similar-looking mathematical increment symbol, ∆, is a different character.
- Microsoft Word or Outlook: Type 0394 and press Alt+X for Δ, or type 03B4 and press Alt+X for δ.
- Windows: Find either character in Character Map and copy it.
- Mac: Open Character Viewer, search for “delta,” and choose the Greek capital or small letter. Check the preview so you do not select ∆ by mistake.
- iPhone or Android: Add the Greek keyboard, use its shift key for Δ, or select δ in the lowercase layout.
- Google Docs: Choose Insert > Special characters, search for “delta,” and select the required case.
Copy-Paste, Character Viewer, and Insert Symbol Fallbacks
Use these exact characters when a shortcut or keyboard layout is unavailable:
- Pi: π
- Backwards K: Ʞ
- Uppercase delta: Δ
- Lowercase delta: δ
In Word, use Insert > Symbol > More Symbols, then search or browse by Unicode value. In LibreOffice, use Insert > Special Character. On macOS, Character Viewer works in most apps.
For frequent use on a phone, add a text replacement under keyboard settings. For example, set ;pi to π, ;bk to Ʞ, and ;delta to Δ.