Zeta Symbol

Ζ ζ

The zeta symbol (Ζ / ζ) is a letter of the Greek alphabet. This page covers its meaning across mathematics, science, and engineering, its Unicode code point, TeX command, and Windows Alt codes — and you can copy and paste the zeta symbol with one click.

Uppercase Zeta Symbol (Ζ)

Symbol	Format	Data
Ζ	Unicode	U+0396
Ζ	HTML	Ζ
Ζ	CSS	\0396
Ζ	JavaScript	\u0396
$\Zeta$	TeX	\Zeta
	SVG	Download ↓
	Image	Download ↓

Also known as: zeta, uppercase zeta, big zeta, greek zeta, greek z.

Ζ is the capital form of the Greek letter zeta, visually identical to the Latin letter Z. Because of this resemblance it is almost never used as a distinct mathematical symbol. The lowercase ζ is well known from the Riemann zeta function of analytic number theory.

\Zeta

Lowercase Zeta Symbol (ζ)

Symbol	Format	Data
ζ	Unicode	U+03B6
ζ	HTML	ζ
ζ	CSS	\03b6
ζ	JavaScript	\u03B6
$\zeta$	TeX	\zeta
	SVG	Download ↓
	Image	Download ↓

Also known as: lowercase zeta, small zeta, greek zeta, zeta greek letter, riemann zeta, zeta function, damping ratio.

The Greek letter ζ (zeta) is the sixth letter of the Greek alphabet. Its most prominent role is in the Riemann zeta function ζ(s), a central object of analytic number theory defined for Re(s) > 1 by an infinite series and extended to the rest of the complex plane by analytic continuation. It also appears as a general variable for coordinates, damping ratios in engineering, and small parameters in analysis.

\zeta(s) = \sum_{n=1}^{\infty} \frac{1}{n^s}

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Zeta Symbol — Ζ Greek Capital Letter Zeta, ζ Greek Small Letter Zeta