Zeta — ζ Greek Letter Symbol
ζ
Zeta — ζ / Ζ
6th letter of the Greek alphabet · pronounced /ˈziːtə/
MathematicsPhysicsEngineeringFluid Mechanics
Copy symbol
ζ
Lowercase zeta
Ζ
Uppercase Zeta
Technical reference
| Unicode (lowercase) | U+03B6 |
| Unicode (uppercase) | U+0396 |
| HTML entity | ζ |
| HTML decimal | ζ |
| LaTeX | \zeta |
| Python / Unicode escape | \u03b6 |
| Alt code (Windows) | Alt + 950 |
Uses in science & engineering
Damping ratio
Describes how oscillations in a system decay after a disturbance. Critical parameter in structural and mechanical dynamics.
\(\zeta = \frac{c}{2\sqrt{mk}}\)
Riemann zeta function
Central function in number theory with deep connections to the distribution of prime numbers.
\(\zeta(s) = \sum_{n=1}^{\infty} \frac{1}{n^s}\)
Electrokinetic potential
Zeta potential: electric potential at the slipping plane of a colloidal particle.
\(\zeta = \frac{\eta \mu_e}{\varepsilon}\)
Vorticity component
Component of the vorticity vector in fluid mechanics, describing local rotation of fluid.
\(\zeta = \frac{\partial v}{\partial x} – \frac{\partial u}{\partial y}\)
Related symbols
How to insert in applications
Windows
Best option: copy from this page.
Or press Win + . to open emoji & symbols panel.
Alt codes work only in Word/Notepad with NumLock on and English layout — not in browsers.
Or press Win + . to open emoji & symbols panel.
Alt codes work only in Word/Notepad with NumLock on and English layout — not in browsers.
macOS
Press ⌃⌘Space → Character Viewer → search “zeta”
Microsoft Word
Type 03b6 then press Alt+X
Google Docs
Insert → Special characters → search by name
Excel
Insert → Symbol → Subset: Greek → select symbol
LaTeX
Use in math mode: $ … $
Python
Use Unicode escape or chr()
HTML / CSS
Use HTML entity or decimal code