Greek Symbol
Greek letter

Epsilon Symbol (ε) — Copy & Paste

Grab the epsilon greek symbol in one click. Pronunciation: EP-si-lon.

ΕUpper
εLower
ϵLunate epsilon
Reference

Technical reference

Unicode, HTML entities, and LaTeX — tap the icon beside any value.

Uppercase Epsilon

Character
Ε
Unicode
U+0395
HTML named
Ε
HTML decimal
Ε
LaTeX
E

Lowercase Epsilon

Character
ε
Unicode
U+03B5
HTML named
ε
HTML decimal
ε
LaTeX
\varepsilon

Lunate epsilon

Character
ϵ
Unicode
U+03F5
HTML decimal
ϵ
LaTeX
\epsilon
Context

Common uses in science & math

A small positive quantity

Analysis and machine learning use ε for a tiny tolerance (e.g. convergence ε). Set theory uses ∈ (element of)—a related but different symbol.

Permittivity & strain

Physics writes ε₀ for vacuum permittivity; continuum mechanics uses ε for strain.

Input

How to type Epsilon

Windows

Grab ε from this page. Avoid confusing it with Latin e or ∈.

macOS

Character Viewer → “epsilon”, or grab it here in one click.

Word & Google Docs

Paste ε into equations or prose; pair with LaTeX \varepsilon in Overleaf.

Prefer a full walkthrough? Read how to type Greek letters.

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Epsilon FAQ

Is ε the same as ∈?

No. ε is the letter epsilon; ∈ means “element of” in set theory. Take the one you need explicitly.

ε vs ϵ — which should I use?

Both appear in math fonts. ε (U+03B5) is the standard Greek letter; ϵ (U+03F5) is the lunate form preferred in some textbooks.