Beta — β Greek Letter Symbol
β
Beta — β / Β
2nd letter of the Greek alphabet · pronounced /ˈbiːtə/
PhysicsEngineeringStatisticsFinance
Copy symbol
β
Lowercase beta
Β
Uppercase Beta
Technical reference
| Unicode (lowercase) | U+03B2 |
| Unicode (uppercase) | U+0392 |
| HTML entity | β |
| HTML decimal | β |
| LaTeX | \beta |
| Python / Unicode escape | \u03b2 |
| Alt code (Windows) | Alt + 946 |
Uses in science & engineering
Beta radiation
High-energy electrons or positrons emitted during radioactive beta decay.
\(n \rightarrow p + e^- + \bar{\nu}_e\)
Beta coefficient (finance)
Measures the volatility of an asset relative to the overall market.
\(\beta = \frac{\text{Cov}(r_i, r_m)}{\text{Var}(r_m)}\)
Beta distribution (statistics)
Continuous probability distribution defined on the interval [0, 1].
\(f(x; \alpha, \beta) = \frac{x^{\alpha-1}(1-x)^{\beta-1}}{B(\alpha,\beta)}\)
Compressibility (thermodynamics)
Isothermal compressibility of a substance under pressure.
\(\beta_T = -\frac{1}{V}\left(\frac{\partial V}{\partial P}\right)_T\)
Plane angle (engineering)
Used alongside α to denote angles in structural and mechanical analysis.
\(\sin\beta = \frac{\text{opposite}}{\text{hypotenuse}}\)
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 “beta”
Microsoft Word
Type 03b2 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