Greek Numerals
In the ancient Greek numeral system, each letter of the alphabet was assigned a numeric value. The first nine letters represent the units 1–9, the next nine represent the tens 10–90 and the last group represents the hundreds 100–800. The table below lists the values associated with each letter, based on traditional sources【440549533629918†L8-L56】.
| Letter | Numeric value |
|---|---|
| Α α | 1 |
| Β β | 2 |
| Γ γ | 3 |
| Δ δ | 4 |
| Ε ε | 5 |
| Ζ ζ | 7 |
| Η η | 8 |
| Θ θ | 9 |
| Ι ι | 10 |
| Κ κ | 20 |
| Λ λ | 30 |
| Μ μ | 40 |
| Ν ν | 50 |
| Ξ ξ | 60 |
| Ο ο | 70 |
| Π π | 80 |
| Ρ ρ | 100 |
| Σ σ | 200 |
| Τ τ | 300 |
| Υ υ | 400 |
| Φ φ | 500 |
| Χ χ | 600 |
| Ψ ψ | 700 |
| Ω ω | 800 |
Note that sigma has a special final form (ς) used at the end of words, but its numeric value is the same as the ordinary sigma (σ). In some ancient contexts additional letters such as stigma/digamma (Ϝ), koppa (Ϟ) and sampi (ϡ) were used to fill gaps and represent 6, 90 and 900 respectively. These letters are now obsolete but may appear in numerical inscriptions.