What is the Unicode codepoint for epsilon?

Lowercase epsilon (ε) is U+03B5 and uppercase epsilon (Ε) is U+0395, both in the Greek and Coptic Unicode block. A third character, the lunate epsilon symbol (ϵ), is U+03F5.

What is the HTML entity for epsilon?

Use ε for lowercase (ε) and Ε for uppercase (Ε). The numeric entities ε and Ε also work. The lunate variant uses ϵ (ϵ, U+03F5).

What is the LaTeX command for epsilon?

Type \epsilon for the lunate form (ϵ) or \varepsilon for the open, curled form (ε) more common in real analysis textbooks. Uppercase epsilon looks identical to the Latin letter E, so LaTeX has no separate \Epsilon command; just type E.

What is the difference between ε and ϵ?

Both are epsilon, but they are distinct Unicode characters with different shapes. U+03B5 (ε) is the standard small epsilon seen in most math typesetting. U+03F5 (ϵ) is the lunate epsilon, a rounder variant that some fonts and fields use instead. They are not interchangeable in strict Unicode text matching.

How do I type epsilon on a keyboard?

On Windows, hold Alt and type 0949 on the numeric keypad for lowercase epsilon. On Mac, no default shortcut exists, so use the Character Viewer (Control+Command+Space) and search "epsilon". This page's copy button works on any device without a shortcut.

Is epsilon the same symbol as "element of" (∈)?

No. The set membership symbol ∈ (U+2208) is a separate character, though it looks similar to the lunate epsilon (ϵ). They render alike in some fonts but mean different things and should not be substituted for each other.

What does epsilon mean in physics?

Epsilon most commonly denotes permittivity, the measure of how an electric field affects and is affected by a medium. The vacuum permittivity constant ε₀ appears throughout electromagnetism formulas like Coulomb's law.

Epsilon Symbol

Name: Epsilon Symbol
Availability: InStock
Author: Nham Vu

Copy the uppercase or lowercase epsilon symbol (Ε ε) and find its Unicode codepoint, HTML entity, LaTeX command, and lunate variant.

Epsilon Symbol

Click the symbol to copy it

Formats

Character ε

Unicode U+03B5

HTML entity ε

HTML decimal ε

LaTeX \varepsilon

JS / JSON escape ε

Click any row to copy that exact string.

Lunate epsilon variant

A separate, rounder Unicode character used in some math and set-theory notation instead of the standard epsilon.

Common Uses

Field	Example	Meaning
Real analysis		The epsilon-delta definition of a limit or continuity.
Physics		Vacuum permittivity, a constant in electromagnetism.
Tensor calculus		The Levi-Civita symbol, used in cross products and determinants.
Machine learning		A reinforcement learning strategy balancing exploration and exploitation.
Chemistry		The Beer-Lambert law, where ε is molar absorptivity.
Engineering		Engineering strain, the ratio of length change to original length.

Build an epsilon value label

Type a number to build a ready-to-paste epsilon value, like a tolerance or threshold.

ε = 0.01

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Summary

Copy the uppercase or lowercase epsilon symbol (Ε ε) and find its Unicode codepoint, HTML entity, LaTeX command, and lunate variant.

How it works

Click the large epsilon symbol to copy it to your clipboard.
Switch between uppercase (Ε) and lowercase (ε) with the toggle.
Click any row in the formats list to copy that exact string: Unicode, HTML entity, or LaTeX.
Copy the lunate epsilon variant (ϵ) separately if your field uses that glyph instead.
Paste the symbol anywhere: documents, spreadsheets, code, or chat.

Use cases

Write the epsilon-delta definition of a limit in a real analysis proof.
Reference the permittivity of free space (ε₀) in an electromagnetism formula.
Type the Levi-Civita symbol (ε_ijk) for tensor and vector calculus notation.
Set the exploration rate in an epsilon-greedy reinforcement learning algorithm.
Insert molar absorptivity (ε) into a Beer-Lambert law calculation in chemistry.
Type Greek letters in a math or physics report without a special keyboard layout.
Copy the correct LaTeX command (\epsilon or \varepsilon) instead of typing it from memory.

Frequently Asked Questions

Last updated: 2026-07-22 · Reviewed by Nham Vu