Mu — μ Greek Letter Symbol
μ
Mu — μ / Μ
12th letter of the Greek alphabet · pronounced /mjuː/
PhysicsEngineeringMathematicsSI Units
Copy symbol
μ
Lowercase mu
Μ
Uppercase Mu
Technical reference
| Unicode (lowercase) | U+03BC |
| Unicode (uppercase) | U+039C |
| HTML entity | μ |
| HTML decimal | μ |
| LaTeX | \mu |
| Python / Unicode escape | \u03bc |
| Alt code (Windows) | Alt + 956 |
Uses in science & engineering
Micro- prefix (SI)
SI prefix denoting 10⁻⁶. Used in μm (micrometres), μF (microfarads), μA (microamperes) etc.
\(1\,\mu\text{m} = 10^{-6}\,\text{m}\)
Coefficient of friction
Ratio of friction force to normal force. Critical in mechanical and civil engineering.
\(F_f = \mu \cdot N\)
Dynamic viscosity
Resistance of a fluid to shear deformation. Used in fluid mechanics and pipe flow calculations.
\(\tau = \mu \frac{du}{dy}\)
Magnetic permeability
Measure of a material ability to support the formation of a magnetic field.
\(B = \mu H\)
Mean (statistics)
Population mean in statistical analysis and probability distributions.
\(\mu = \frac{1}{N}\sum_{i=1}^{N} x_i\)
Related symbols
How to insert in applications
Windows
Best option: copy from this page.
Or press Win + . to open emoji & symbols panel.
Alt codes work only in Word/Notepad with NumLock on and English layout — not in browsers.
Or press Win + . to open emoji & symbols panel.
Alt codes work only in Word/Notepad with NumLock on and English layout — not in browsers.
macOS
Press ⌃⌘Space → Character Viewer → search “mu”
Microsoft Word
Type 03bc then press Alt+X
Google Docs
Insert → Special characters → search by name
Excel
Insert → Symbol → Subset: Greek → select symbol
LaTeX
Use in math mode: $ … $
Python
Use Unicode escape or chr()
HTML / CSS
Use HTML entity or decimal code