μ
Mu in Mathematics
In Mathematics, the Mu symbol (μ) is commonly used. Learn how to copy and use it in your technical documents.
Unicode
U+03BC
HTML Entity
μ
LaTeX Sequence
\mu
Primary Field
MathematicsMathematics Application
Mu is the SI prefix micro (10⁻⁶, as in µm or µs), the coefficient of friction in mechanics, the population mean in statistics, magnetic permeability, reduced mass, and the muon particle.
How to type Mu (μ)
- Fastest: click μ on the keyboard above — it copies to your clipboard, ready to paste into Word, Google Docs, email or a forum.
- Unicode: the code point is shown in the panel above; on Windows you can also use Alt‑X after the hex code in Word.
- LaTeX: use the command shown above inside math mode.
- Anywhere: because it’s standard Unicode, it keeps its exact form across apps and devices.
Frequently asked questions
Is µ (micro) the same as the Greek μ?
They are visually identical and both encoded; the ‘micro sign’ is preferred for units, but the Greek mu is widely used and understood.
What is the coefficient of friction μ?
A number describing how much friction exists between two surfaces; higher μ means more grip.
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Need to pair this symbol with other operators?