Phi Symbol (φ)
Copy the Phi symbol φ to your clipboard, and see its Unicode code point, HTML entity, LaTeX command and how to type it on any device.
What does φ mean?
Phi represents the golden ratio (≈1.618), magnetic flux in electromagnetism, phase angle in waves and AC circuits, electric potential, and Euler’s totient function in number theory. φ is the lowercase form of Phi, letter 21 of 24 in the Greek alphabet (pronounced FIE / FEE). Its capital counterpart is Φ. In science and maths it is used for: Golden ratio, magnetic flux, phase angle.
Codes and properties
| Character | φ |
|---|---|
| Unicode name | GREEK SMALL LETTER PHI |
| Code point | U+03C6 |
| Decimal | 966 |
| Unicode block | Greek and Coptic |
| HTML entity | φ · φ · φ |
| CSS | \03C6 |
| JavaScript / JSON | \u03C6 |
| Python | \u03C6 or \N{GREEK SMALL LETTER PHI} |
| UTF-8 bytes | CF 86 |
| LaTeX | \varphi |
How to type φ
- Copy & paste: press the Copy button above, then paste φ anywhere — Word, Google Docs, email, chat or code.
- Windows (Word, WordPad, Outlook): type
03C6then press Alt+X. In any app, Win+. opens the symbol panel. - Mac: switch to the Unicode Hex Input keyboard, hold Option and type
03C6; or press Ctrl+Cmd+Space and search “greek small letter phi”. - Linux (GTK/IBus): press Ctrl+Shift+U, type
03c6, then Space. - HTML:
φrenders as φ. - LaTeX:
\varphiin math mode (amssymb package for some symbols). - Note: φ (U+03C6) corresponds to
\varphi;\phigives the variant form ϕ.
Frequently asked questions
What is the golden ratio φ?
An irrational number ≈1.618 that appears in art, architecture and nature, where a+b is to a as a is to b.
What is magnetic flux Φ?
A measure of the magnetic field passing through a surface, central to Faraday’s law of induction.
How do I type φ on Windows?
In Microsoft Word type 03C6 and press Alt+X. In any app press Win+. to open the symbol panel, or copy φ from this page.
What is the HTML code for φ?
Use φ or φ (hex) or φ (decimal).
What is the LaTeX command for φ?
Use \varphi in math mode.