Complete Greek Alphabet — Copy & Paste All Letters
All 24 Greek letters with both uppercase and lowercase forms, their English names, and their common uses in mathematics, science, and everyday language. Click any row to copy the lowercase letter.
| Uppercase | Lowercase | Name | Common Uses |
|---|---|---|---|
| Α | α | Alpha | First, beginning, alpha particle, significance level |
| Β | β | Beta | Second, beta testing, beta radiation, regression coefficient |
| Γ | γ | Gamma | Gamma radiation, gamma function, shear strain |
| Δ | δ | Delta | Change, difference, river delta, Dirac delta function |
| Ε | ε | Epsilon | Small quantity in calculus, permittivity, empty string |
| Ζ | ζ | Zeta | Riemann zeta function, damping ratio |
| Η | η | Eta | Efficiency, viscosity, eta meson |
| Θ | θ | Theta | Angle, temperature (thermodynamics), angular position |
| Ι | ι | Iota | Tiny amount ('not one iota'), iota subscript |
| Κ | κ | Kappa | Curvature, thermal conductivity, spring constant |
| Λ | λ | Lambda | Wavelength, lambda calculus, decay constant, eigenvalue |
| Μ | μ | Mu | Micro- (10⁻⁶), mean, friction coefficient, magnetic permeability |
| Ν | ν | Nu | Frequency, kinematic viscosity, neutrino |
| Ξ | ξ | Xi | Random variable, xi baryon |
| Ο | ο | Omicron | Fifteenth letter, COVID-19 variant name |
| Π | π | Pi | π ≈ 3.14159, circle ratio, prime counting function |
| Ρ | ρ | Rho | Density, resistivity, correlation coefficient, rho meson |
| Σ | σ | Sigma | Summation (Σ), standard deviation (σ), stress, Stefan-Boltzmann |
| Τ | τ | Tau | Torque, shear stress, tau lepton, 2π constant |
| Υ | υ | Upsilon | Upsilon meson, sometimes used for velocity |
| Φ | φ | Phi | Golden ratio (φ ≈ 1.618), magnetic flux, work function |
| Χ | χ | Chi | Chi-squared test, electric susceptibility |
| Ψ | ψ | Psi | Wave function (quantum), psychology symbol |
| Ω | ω | Omega | Ohm (Ω), angular frequency (ω), last/final |