# GreekAlphabet.net > A complete reference for the Greek alphabet: all 24 letters (Alpha to Omega) with meanings, pronunciation, history, numeric values, and usage in mathematics, science, engineering, and finance — plus interactive tools for copying, typing, generating, and learning Greek letters. The Greek alphabet has 24 letters, in order: Alpha, Beta, Gamma, Delta, Epsilon, Zeta, Eta, Theta, Iota, Kappa, Lambda, Mu, Nu, Xi, Omicron, Pi, Rho, Sigma, Tau, Upsilon, Phi, Chi, Psi, Omega (α β γ δ ε ζ η θ ι κ λ μ ν ξ ο π ρ σ τ υ φ χ ψ ω). ## Core Reference - [Greek Alphabet in Order](https://greekalphabet.net/order): All 24 letters from Alpha to Omega with position lookup, sounds, and FAQ - [All 24 Greek Letters](https://greekalphabet.net/letters/): Index of detailed guides for every letter - [Greek Alphabet Chart](https://greekalphabet.net/chart): Visual chart of every letter with details - [Greek Symbols & Meanings](https://greekalphabet.net/symbols): What each Greek letter stands for - [Greek Numerals](https://greekalphabet.net/numerals): The Greek number system and each letter's numeric value - [Pronunciation Guide](https://greekalphabet.net/pronunciation): Ancient and modern pronunciation of each letter - [History of the Greek Alphabet](https://greekalphabet.net/history): Origins from Phoenician script to today - [FAQ](https://greekalphabet.net/faq): Common questions about the Greek alphabet ## Individual Letters - [Alpha (Α α)](https://greekalphabet.net/letters/alpha): First letter — angles, significance level, alpha particles - [Beta (Β β)](https://greekalphabet.net/letters/beta): Second letter — beta radiation, finance beta, beta testing - [Gamma (Γ γ)](https://greekalphabet.net/letters/gamma): Third letter — gamma radiation, gamma function - [Delta (Δ δ)](https://greekalphabet.net/letters/delta): Fourth letter — change, difference, increment - [Epsilon (Ε ε)](https://greekalphabet.net/letters/epsilon): Fifth letter — small quantities, permittivity - [Zeta (Ζ ζ)](https://greekalphabet.net/letters/zeta): Sixth letter — Riemann zeta function, damping ratio - [Eta (Η η)](https://greekalphabet.net/letters/eta): Seventh letter — efficiency, viscosity - [Theta (Θ θ)](https://greekalphabet.net/letters/theta): Eighth letter — angles in trigonometry, theta waves - [Iota (Ι ι)](https://greekalphabet.net/letters/iota): Ninth letter — "not one iota," unit vectors - [Kappa (Κ κ)](https://greekalphabet.net/letters/kappa): Tenth letter — thermal conductivity, curvature - [Lambda (Λ λ)](https://greekalphabet.net/letters/lambda): Eleventh letter — wavelength, eigenvalues, lambda calculus - [Mu (Μ μ)](https://greekalphabet.net/letters/mu): Twelfth letter — micro- prefix, friction, population mean - [Nu (Ν ν)](https://greekalphabet.net/letters/nu): Thirteenth letter — frequency, neutrinos - [Xi (Ξ ξ)](https://greekalphabet.net/letters/xi): Fourteenth letter — random variables, xi baryons - [Omicron (Ο ο)](https://greekalphabet.net/letters/omicron): Fifteenth letter — Big-O notation, variant naming - [Pi (Π π)](https://greekalphabet.net/letters/pi): Sixteenth letter — π ≈ 3.14159, product notation - [Rho (Ρ ρ)](https://greekalphabet.net/letters/rho): Seventeenth letter — density, resistivity, correlation - [Sigma (Σ σ ς)](https://greekalphabet.net/letters/sigma): Eighteenth letter — summation, standard deviation - [Tau (Τ τ)](https://greekalphabet.net/letters/tau): Nineteenth letter — torque, time constants, tau = 2π - [Upsilon (Υ υ)](https://greekalphabet.net/letters/upsilon): Twentieth letter — upsilon mesons - [Phi (Φ φ)](https://greekalphabet.net/letters/phi): Twenty-first letter — golden ratio, magnetic flux - [Chi (Χ χ)](https://greekalphabet.net/letters/chi): Twenty-second letter — chi-squared distribution - [Psi (Ψ ψ)](https://greekalphabet.net/letters/psi): Twenty-third letter — wave functions, psychology - [Omega (Ω ω)](https://greekalphabet.net/letters/omega): Twenty-fourth and last letter — ohms, angular velocity ## Tools - [Copy & Paste Greek Letters](https://greekalphabet.net/copy-paste): One-click copy for every Greek character - [How to Type Greek Letters](https://greekalphabet.net/how-to-type): Keyboard methods for Windows, Mac, Linux, and mobile - [Greek Text Generator](https://greekalphabet.net/generator): Convert Latin text to Greek letters - [Greek Keyboard Guide](https://greekalphabet.net/keyboard): Setting up and using a Greek keyboard layout - [Unicode & Character Codes](https://greekalphabet.net/unicode): Unicode code points for all Greek letters - [LaTeX Greek Letters](https://greekalphabet.net/latex-greek): LaTeX commands for every Greek letter - [HTML Greek Entities](https://greekalphabet.net/html-greek): HTML entity codes for web development - [Letter Comparison Tool](https://greekalphabet.net/comparison-tool): Compare any two Greek letters side by side ## Learning - [Greek Alphabet for Beginners](https://greekalphabet.net/beginners): Step-by-step introduction - [Greek Alphabet Quiz](https://greekalphabet.net/quiz): Interactive knowledge test - [Flashcards](https://greekalphabet.net/flashcards): Digital study flashcards - [How to Memorize the Greek Alphabet](https://greekalphabet.net/memorize-greek-alphabet): Mnemonics, songs, and study schedule - [Printable Chart](https://greekalphabet.net/printable-chart): Printable reference chart - [Worksheets](https://greekalphabet.net/worksheets): Printable tracing and practice worksheets - [How to Write Greek Letters](https://greekalphabet.net/writing): Stroke order and handwriting - [Greek Alphabet for Kids](https://greekalphabet.net/greek-alphabet-for-kids): Simplified guide with games - [Look-Alike Letters](https://greekalphabet.net/lookalikes): Greek letters that resemble English ones - [Learning Resources](https://greekalphabet.net/resources): Recommended books, courses, and tools ## Greek Letters by Subject - [Greek Letters in Mathematics](https://greekalphabet.net/greek-letters-math): Mathematical notation and constants - [Greek Letters in Physics](https://greekalphabet.net/greek-letters-physics): Physics symbols and constants - [Greek Letters in Statistics](https://greekalphabet.net/greek-letters-statistics): Statistical parameters and notation - [Greek Letters in Engineering](https://greekalphabet.net/greek-letters-engineering): Stress, strain, damping, control systems - [Greek Letters in Chemistry](https://greekalphabet.net/greek-letters-chemistry): Bonds, anomers, spectroscopy - [Greek Letters in Biology & Medicine](https://greekalphabet.net/greek-letters-biology): Proteins, receptors, brain waves - [Greek Letters in Finance](https://greekalphabet.net/greek-letters-finance): Alpha, beta, and the option Greeks - [Greek Letters in Computer Science](https://greekalphabet.net/greek-letters-computer-science): Lambda calculus, Big-O notation ## History & Culture - [Ancient vs. Modern Greek](https://greekalphabet.net/ancient-modern): How the language changed over 2,800 years - [Biblical (Koine) Greek](https://greekalphabet.net/biblical-greek): The Greek of the New Testament - [Greek vs. Latin Alphabet](https://greekalphabet.net/comparison): How English letters descend from Greek - [Greek vs. Cyrillic Alphabet](https://greekalphabet.net/greek-vs-cyrillic): Slavic descendants of Greek - [NATO Phonetic vs. Greek Alphabet](https://greekalphabet.net/nato-vs-greek): "Alpha, Bravo, Charlie" vs. Greek - [Fraternities & Sororities](https://greekalphabet.net/fraternities-sororities): Why Greek life uses Greek letters - [Greek Alphabet in Culture](https://greekalphabet.net/culture): Idioms, brands, and pop culture - [Uses of Greek Letters](https://greekalphabet.net/uses): Overview of scientific and everyday uses ## Optional - [About](https://greekalphabet.net/about): About this site - [Contact](https://greekalphabet.net/contact): contact@greekalphabet.net