How Many Letters in the Greek Alphabet?
Twenty-four is the easy answer. The harder truth is that almost nobody wants all of them: they want Pi for a formula, Sigma for a sum, Omega for a label, or one symbol to paste into a document. So this page is built to hand you exactly that — tap a letter, it copies; tap again, it speaks.
Tap a letter to copy it
Tap any letter and it is copied to your clipboard, ready to paste. Tap again in the panel to hear it.
3.14159… — circumference over diameter.
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One alphabet doing two jobs
The Greek alphabet still writes a living language spoken by millions — but its second career is far larger. Pull apart any science textbook and the same 24 letters reappear as a universal symbol set: Pi for 3.14159, Theta for an angle, Lambda for wavelength, Sigma for a sum, Mu for "micro", Omega for electrical resistance.
That dual life is why the search traffic splits so oddly: some people are learning Greek, but far more are chasing a single character for a maths assignment, a lab report, a logo or a fraternity name. The explorer above is built for both.
It wasn’t always 24
The number only settled when Athens officially adopted the 24-letter Ionic alphabet in 403 BC. Before that, local Greek alphabets carried letters that have since disappeared from writing: Digamma (a "w" sound), Koppa (a "k" before back vowels), San (a rival to Sigma) and Sampi. Switch the explorer to "Ancient extras" to see them.
Several outlived their retirement as numerals — Digamma stood for 6, Koppa for 90, Sampi for 900 — and Koppa is the direct ancestor of our letter Q. Greek also made one genuinely revolutionary move: it was the first alphabet to give vowels their own letters, rather than leaving the reader to guess them.
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From Alpha to Omega
The word "alphabet" is itself Greek, stitched from the first two letters, Alpha and Beta. The phrase "from alpha to omega" — first letter to last — survives as a tidy way of saying "from start to finish", and turns up in the Book of Revelation as a title meaning the beginning and the end. The ancient scholars of Alexandria even used the alphabet as a numbering system for literature: the Iliad has exactly 24 books because they gave it one per letter, Α to Ω. Twenty-four letters, but the two on the ends do most of the cultural work.
Sources
- Standard references on the Greek alphabet — the 24 letters Alpha to Omega and their order.
- History of the Ionic alphabet officially adopted by Athens in 403 BC; the archaic letters Digamma, Koppa, San and Sampi and their numeral roles.
- Greek as the first alphabet to represent vowels; the Latin alphabet’s descent from a western Greek variant.
- Conventional Greek-letter symbols across mathematics, physics, statistics and engineering.
Frequently asked questions
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Twenty-four letters from Alpha to Omega — but the one you came for is a single tap away.