Micro Symbol Tool
µ

Pick a style — click to use & copy

Shortcodes

Quick reference codes for the µ Micro Sign.

UnicodeU+00B5
Alt Code0181 (Win) / 230 (Mac)
HTML Codeµ
CSS Code\00B5
HTML Entityµ
HEX Codeµ

About the Micro Symbol

The micro sign µ (U+00B5) is the SI prefix denoting one millionth (10−6) of a unit. It descends from the Greek lowercase letter mu μ (U+03BC), which is visually identical but a distinct Unicode code point — U+00B5 is the official symbol for the SI prefix while U+03BC is reserved for the Greek letter in mathematical or linguistic contexts. In practice both are used interchangeably in measurements. Common uses include µm (micrometer / micron — one millionth of a metre), µs (microsecond), µL (microlitre), µg (microgram), µV (microvolt), and µA (microampere). In electronics the micro prefix is ubiquitous: a standard human hair is about 70 µm in diameter, and a MOSFET gate can be as thin as 5 µm. On a standard keyboard type µ with Alt + 230 on Windows or Option + M on Mac. In HTML use µ or µ. The capital form is M (Μ U+039C), representing mega (106) when used as an SI prefix — the opposite scale to micro.

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Micro Symbol Guide: Meaning, Copy Paste, Keyboard Shortcut, Word, Units & More

The micro symbol shows up everywhere in science and tech—physics, math, electronics, chemistry, engineering, you name it. It stands for the Greek letter “mu” and basically means “one millionth” of whatever unit you’re using.

Here’s what it looks like: µ

You’ll see people searching for how to type it in Word, which keyboard shortcut works, or what it actually means because it’s a staple for measurements, units, and scientific notation.

So, what does “micro” mean? Simple: 10^{-6} = 0.000001

That’s a millionth.

Copy Paste Micro Symbol

Want to just copy it? Grab it here:

µ

The Greek letter mu is almost identical:

μ

Stylish versions:

µ μ 𝜇 𝝁 𝞵

Micro Prefix Meaning

The micro prefix always equals:

1\ \mu = 0.000001 = 10^{-6}

You see it used everywhere. For example:

  • 1 µm = one micrometer
  • 1 µs = one microsecond
  • 1 µF = one microfarad
  • 1 µA = one microampere

The micro symbol stands for an extremely tiny amount—one-millionth of something.

What the Micro Symbol Means in Different Fields

Here’s what it means in different fields:

  • Physics: small measurements
  • Electronics: current/capacitance
  • Biology: microscopic size
  • Chemistry: tiny quantities
  • Math: scientific notation

You’ll hear it called the “micro sign” or the “mu symbol,” since it’s based on the Greek letter Mu.

Micro Symbol Text Styles

Text versions:

  • µ
  • μ

Fancy styles:

  • 𝜇
  • 𝝁
  • 𝞵

Bold:

  • 𝝁

Italic:

  • 𝜇

One micro is 1/1,000,000 (in decimals: 0.000001).

Micro Symbol in Physics

In physics, you’ll see:

  • µm (micrometer)
  • µs (microsecond)
  • µA (microampere)
  • µC (microcoulomb)

Micro Symbol in Electronics

Electronics are full of micro values:

  • 10 µF capacitor
  • 500 µA current
  • 20 µs delay

Micro Symbol in Chemistry

Chemistry uses it for tiny measures:

  • µg (microgram)
  • µL (microliter)
  • µmol (micromole)

Keyboard Shortcut for Micro Symbol

Typing it on your keyboard depends on your setup.

Shortcut cheat sheet:

  • Windows: Alt + 0181
  • Mac: Option + M
  • Word Unicode: 00B5 + Alt + X

You can also try:

  • Windows: Alt + 230

Micro Symbol in Word

In Microsoft Word, you can:

  • Copy-paste directly
  • Use the Alt code
  • Choose it from the Symbol menu

Another method:

  • Type 00B5, then press Alt + X

Difference Between µ and μ

So, what’s the difference between µ and μ?

  • µ is the micro sign (U+00B5)
  • μ is the actual Greek letter mu (U+03BC)

They look nearly identical and are often swapped without a problem.

HTML Code for Micro Symbol

Want the HTML code?

µ → µ

Unicode Values

SymbolUnicode
µU+00B5
μU+03BC

LaTeX Micro Symbol

Writing in LaTeX?

\mu → μ

Why the Micro Symbol Matters

The micro symbol makes scientific notation compact and accurate. It keeps equations readable, helps engineers with circuit specs, and is recognized everywhere.

Main reasons it matters:

  • Makes measurements shorter
  • Standard in science and engineering
  • Used worldwide
  • Keeps formulas easy to read

Common Units Using the Micro Symbol

UnitMeaning
µmMicrometer
µgMicrogram
µAMicroampere
µFMicrofarad
µLMicroliter
µsMicrosecond

Examples

  • 25 µm
  • 100 µA
  • 5 µF
  • 2 µs

Frequently Asked Questions

What is the micro symbol?

It’s µ, meaning one millionth.

What’s the value?

10^{-6} = 0.000001

What do you call it?

Micro sign or Greek mu symbol.

How do you type it on Windows?

Alt + 0181.

How about Mac?

Option + M.

How do you use it in Word?

Alt + 0181 or just copy-paste.

What’s its Unicode?

µ is U+00B5.

Are µ and μ the same?

Almost—they’re just different Unicode characters.

Conclusion

The micro symbol is a big deal in scientific and technical fields. You see it everywhere, from micrometers and microseconds to microamps and micrograms. Knowing how to type it, use it in equations, and recognize it in different formats makes any technical work more efficient. Whether you’re writing in Word, coding, or building circuits, it keeps things clear and consistent.

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