Copy and paste the capital psi Ψ with one click
Last reviewed on October 31, 2026
Capital Ψ is the uppercase psi, a trident shape. Quantum mechanics uses Ψ for the full wave function of a system, as in the Schrödinger equation. It is also a symbol of psychology as a discipline.
Its official Unicode name is Greek Capital Letter Psi. Browse the Greek Letters page for related characters.
Type 03A8 then press Alt+X in Word; in other apps, copy Ψ from this page and paste it. It has no classic Alt code. You can also copy Ψ straight from this page.
Press Ctrl+Cmd+Space to open the Character Viewer, then search for the symbol by name.
It is Unicode code point U+03A8, named Greek Capital Letter Psi. In HTML, use Ψ or the numeric reference Ψ.