This table gives the common English pronunciation of Greek letters using the International Phonetic Alphabet (see Help:IPA for English.) It is the pronunciation of the ancient Greek names of the Greek letters using the English teaching pronunciation (traditionally called "Erasmian"). Sometimes, especially in the sciences, the vowels will be pronounced closer to the Greek, for example /ˈpsiː/ instead of /ˈsaɪ/ for psi.

Greek	Greek name	English name	English pronunciation	Modern Greek pronunciation
Α α	άλφα	Alpha	/ˈælfə/	[ˈalfa]
Β β	βήτα	Beta	/ˈbiːtə/, US /ˈbeɪtə/	[ˈvita]
Γ γ	γάμα	Gamma	/ˈɡæmə/	[ˈɣama]
Δ δ	δέλτα	Delta	/ˈdɛltə/	[ˈðelta]
Ε ε	έψιλον	Epsilon	/ˈɛpsɨlɒn/, UK also /ɛpˈsaɪlən/	[ˈepsilon]
Ζ ζ	ζήτα	Zeta	/ˈziːtə/, US /ˈzeɪtə/	[ˈzita]
Η η	ήτα	Eta	/ˈiːtə/, US /ˈeɪtə/	[ˈita]
Θ θ	θήτα	Theta	/ˈθiːtə/, US /ˈθeɪtə/	[ˈθita]
Ι ι	γιώτα	Iota	/aɪˈoʊtə/	[ˈjota]
Κ κ	κάππα	Kappa	/ˈkæpə/	[ˈkapa]
Λ λ	λάμβδα	Lambda	/ˈlæmdə/	[ˈlamða]
Μ μ	μι	Mu	/ˈmjuː/	[ˈmi]
Ν ν	νι	Nu	/ˈnjuː/, US /ˈnuː/	[ˈni]
Ξ ξ	ξι	Xi	/ˈzaɪ/, /ˈksaɪ/	[ˈksi]
Ο ο	όμικρον	Omicron	/ˈɒmɨkrɒn/, traditional UK /ˈoʊmaɪkrɒn/	[ˈomikron]
Π π	πι	Pi	/ˈpaɪ/	[ˈpi]
Ρ ρ	ρο	Rho	/ˈroʊ/	[ˈro]
Σ σ ς (final)	σίγμα	Sigma	/ˈsɪɡmə/	[ˈsiɣma]
Τ τ	ταυ	Tau	/ˈtaʊ/, also /ˈtɔː/	[ˈtaf]
Υ υ	ύψιλον	Upsilon	/juːpˈsaɪlən/, /ˈʊpsɨlɒn/, US /ˈʌpsɨlɒn/	[ˈipsilon]
Φ φ	φι	Phi	/ˈfaɪ/	[ˈfi]
Χ χ	χι	Chi	/ˈkaɪ/	[ˈçi]
Ψ ψ	ψι	Psi	/ˈsaɪ/, /ˈpsaɪ/	[ˈpsi]
Ω ω	ωμέγα	Omega	US /oʊˈmeɪɡə/, traditional UK /ˈoʊmɨɡə/[1]	[oˈmeɣa]

[edit] References

• Oxford English Dictionary
• English pronunciation IPDF (41.4 KiB)
• English pronunciation IIPDF (49.3 KiB)
• British and US Pronunciation