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Mean / Mu Symbol (μ)

In statistics the population mean is written μ — the Greek letter mu — while a sample mean is x̄ ('x-bar', the x with a line over it).

Greek Small Letter Mu · U+03BC · Greek Letters

Click the symbol or the button to copy it, then paste it anywhere — documents, messages, bios and code.

Mean / Mu Symbol codes

Code	Value
Unicode code point	`U+03BC`
Unicode name	`Greek Small Letter Mu`
HTML named entity	`μ`
HTML decimal	`μ`
HTML hex	`μ`
CSS content code	`\3BC`
JavaScript / JSON	`\u03BC`
Windows Alt code	No standard Alt code — copy it from the card above

Mean / Mu Symbol variants (3)

3 related glyphs — click any tile to copy it. Tiles with a page open that symbol's own page.

µMicro Sign ΣGreek Capital Letter Sigma σGreek Small Letter Sigma

Meaning & usage

In statistics the population mean is written μ — the Greek letter mu — while a sample mean is x̄ ('x-bar', the x with a line over it). The pair mirrors σ (population standard deviation) and s (sample). This page's character is the Greek μ itself; the micro sign µ on the micro page is its identical twin with a different day job in units.

Examples in use

Copy μ into a post, document or message

How to type the mean / mu symbol

Windows

There is no Alt code or direct key for μ. In Microsoft Word, type 03BC and press Alt+X to convert it. Everywhere else, click the Copy button at the top of this page and paste it (Ctrl+V) — that always works.

Mac

There is no Option-key shortcut for μ on a Mac. Open the Character Viewer with Control+Command+Space, search for "Mean / Mu Symbol", and double-click to insert — or copy it from this page.

iPhone & Android

Most phone keyboards have no built-in key for μ. Open this page on your phone, tap Copy, then paste it into your message or bio. (On Android, Gboard's emoji search finds some symbols by name.)

Linux

Press Ctrl+Shift+U, type 03bc and press Enter (works in most GTK apps and terminals with IBus). Or copy it from this page.

Frequently asked questions

How do I copy the μ symbol?

Click the big μ in the card at the top of this page — it copies as a standard Unicode character (U+03BC) and pastes anywhere.

How do I type μ on a keyboard?

There is no standard keyboard shortcut or Alt code for μ. Copy it from this page, or in Microsoft Word type 03BC and press Alt+X.

Why does μ sometimes show as a box or question mark?

The box (called tofu) means the device or font viewing it has no drawing for U+03BC (Greek Small Letter Mu). The character itself is fine — try a different font or a newer device, or use one of the variants on this page.

Is the Mean / Mu Symbol free to use?

Yes. μ is a standard Unicode text character published in the Unicode Character Database. You may use it in personal and commercial documents, designs and products without permission or payment.