What is the Unicode codepoint for mu?

Lowercase mu (μ) is U+03BC and uppercase mu (Μ) is U+039C, both in the Greek and Coptic Unicode block.

What is the HTML entity for mu?

Use μ for lowercase (μ) and Μ for uppercase (Μ). The numeric entities μ and Μ also work.

What is the LaTeX command for mu?

Type \mu for the lowercase letter (μ). Uppercase mu looks identical to the Latin letter M, so LaTeX has no separate \Mu command; just type M.

What is the difference between mu (μ) and the micro sign (µ)?

They look almost identical but are different Unicode characters. Mu (U+03BC) is the Greek letter used in math and physics variables such as friction coefficient or population mean. The micro sign (U+00B5) is a separate character defined by the SI system for unit prefixes like µm and µs. If you need the SI prefix character, use the dedicated micro symbol tool instead.

How do I type mu on a keyboard?

On Windows, type 03BC in Word or another Unicode-aware app and press Alt+X to convert it to μ. On Mac, no default shortcut exists outside a Greek keyboard layout, so use the Character Viewer (Control+Command+Space) and search "mu". This page's copy button works on any device without a shortcut.

What does mu mean in statistics?

Mu (μ) denotes the population mean, the true average of an entire population. It is distinct from x̄ (x-bar), which denotes the mean of a sample drawn from that population.

What does mu mean in physics?

Mu most commonly denotes a coefficient of friction (μ) between two surfaces, or permeability (μ, or μ₀ for the vacuum) in electromagnetism. It also names the muon, a subatomic particle similar to the electron but heavier.

Mu Symbol

Copy the uppercase or lowercase mu symbol (μ Μ) and find its Unicode codepoint, HTML entity, and LaTeX command.

Mu Symbol

Click the symbol to copy it

Formats

Character μ

Unicode U+03BC

HTML entity μ

HTML decimal μ

LaTeX \mu

JS / JSON escape \u03BC

Click any row to copy that exact string.

Not the SI micro sign

Need the character for µm, µs, or µF instead? Those unit prefixes use a separate Unicode character, the micro sign (µ, U+00B5), not this Greek letter.

µ Go to Micro Symbol tool Open

Common Uses

Field	Example	Meaning
Statistics		The population mean, as opposed to the sample mean x̄.
Physics (friction)		The coefficient of friction between two surfaces.
Electromagnetism		The permeability of free space, a constant in magnetism.
Fluid mechanics		Dynamic viscosity, the resistance of a fluid to flow.
Particle physics		The muon, a subatomic particle similar to the electron.
Number theory		The Möbius function, used in number theory and combinatorics.

Build a mu value label

Type a number to build a ready-to-paste mu value, like a mean or coefficient.

μ = 0.3

Copied!

Summary

Copy the uppercase or lowercase mu symbol (μ Μ) and find its Unicode codepoint, HTML entity, and LaTeX command.

How it works

Click the large mu symbol to copy it to your clipboard.
Switch between uppercase (Μ) and lowercase (μ) with the toggle.
Click any row in the formats list to copy that exact string: Unicode, HTML entity, or LaTeX.
Click a row in the common uses table to copy a ready-made example like a friction coefficient or mean value.
Paste the symbol anywhere: documents, spreadsheets, code, or chat.

Use cases

Write the population mean (μ) in a statistics report, next to the sample mean (x̄).
State a coefficient of friction (μ) in a physics or engineering problem.
Reference the permeability of free space (μ₀) in an electromagnetism formula.
Label dynamic viscosity (μ) in a fluid mechanics calculation.
Write the muon (μ⁻) in a particle physics note.
Type the Möbius function (μ(n)) in a number theory proof.
Insert the Greek letter mu into a document without a special keyboard layout.

Frequently Asked Questions

Last updated: 2026-09-22 · Reviewed by Nham Vu

Mu Symbol

Use the Mu Symbol

Mu Symbol

Formats

Not the SI micro sign

Common Uses

Build a mu value label

Summary

How it works

Use cases

Frequently Asked Questions