Micro Sign Symbol (µ)

Copy and paste the micro sign µ with one click

Unicode Character

Unicode Hex

U+00B5

HTML Entity

Decimal Code

181

About the Micro Sign Symbol

Last reviewed on October 31, 2026

µ is the micro sign, meaning one millionth in the metric system, as in 5 µm or 2 µF. It looks like Greek mu but sits at a separate code point from the Greek letter. Fonts treat the two nearly the same.

Its official Unicode name is Micro Sign. Browse the Mathematical Symbols page for related characters.

How to Type Micro Sign on a Keyboard

Windows: Hold Alt and type 0181 on the numeric keypad

Mac: Press Option+M

Microsoft Word: Type 00B5 then press Alt+X

Phone & tablet: Copying µ from this page is fastest — see our mobile typing guide

Micro Sign Code for HTML, CSS & JavaScript

HTML: µ

CSS: content: '\00B5';

JavaScript: '\u00B5'

Unicode: U+00B5

Frequently Asked Questions

How do I type micro sign µ on Windows?

Hold Alt and type 0181 on the numeric keypad. You can also copy µ straight from this page.

How do I type µ on a Mac?

Press Option+M.

What is the Unicode and HTML code for micro sign?

It is Unicode code point U+00B5, named Micro Sign. In HTML, use µ or the numeric reference µ.