Greek Numerals Calculator and Converter

Greek Numeral Converter

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About Greek Numerals

The Greek alphabetic numeral system assigns numerical values to letters of the Greek alphabet (α=1, β=2, ..., ι=10, κ=20, ..., ρ=100, σ=200, etc.).

The keraia (ʹ) marks letters as numerals. The lower numeral sign (͵) placed before a group of letters multiplies their combined value by 1000 (e.g., ͵β = 2000, ͵ιβ = 12000).

Negative numbers are represented with a minus sign (−) prefix. Note: Ancient Greeks didn't use negative numbers; this is a modern adaptation.

Greek Numeral Calculator

First Number (Greek or Decimal)

Enter Greek numerals in any order, or just type a decimal number.

Greek Symbols (click to insert):

Operation

Second Number (Greek or Decimal)

Enter Greek numerals in any order, or just type a decimal number.

Greek Symbols (click to insert):

Result:

Attic Calendar Date (Approximation)

Select Gregorian Date

Approximate Attic Calendar Date:

Historical Greek Calendars

Ancient Greece used various lunisolar calendars, like the Attic calendar (Athens), starting near the summer solstice. Intercalary months were added periodically.

Note: This conversion is a simplified approximation and doesn't account for precise ancient timekeeping complexities.

c. 8th Century BCE

Early Greek calendars develop, varying by city-state.

c. 6th Century BCE

Solon reforms the Athenian calendar.

432 BCE

Meton introduces the 19-year Metonic cycle for intercalation.

c. 4th Century BCE

Callippic cycle (76 years) further refines calendar alignment.

Greek Numeral Clock

About the Greek Clock

This clock displays the current time using Greek numerals for hours, minutes, and seconds.

The hour markers use Greek numerals αʹ through ιβʹ (1-12), while the digital display shows the full time.

Greek Numeral Reference

Units (1-9)

Greek	Value
αʹ	1
βʹ	2
γʹ	3
δʹ	4
εʹ	5
ϛʹ	6
ζʹ	7
ηʹ	8
θʹ	9

Tens (10-90)

Greek	Value
ιʹ	10
κʹ	20
λʹ	30
μʹ	40
νʹ	50
ξʹ	60
οʹ	70
πʹ	80
ϟʹ	90

Hundreds (100-900)

Greek	Value
ρʹ	100
σʹ	200
τʹ	300
υʹ	400
φʹ	500
χʹ	600
ψʹ	700
ωʹ	800
ϡʹ	900

Special Symbols

Symbol	Purpose
ʹ	Keraia (numeral marker)
͵	Thousands multiplier
ϛ	Stigma (6, archaic)
ϟ	Koppa (90, archaic)
ϡ	Sampi (900, archaic)

Examples

ρκγʹ = 100 + 20 + 3 = 123

͵αωπεʹ = 1000 + 800 + 80 + 5 = 1885

͵ιβτμεʹ = 12000 + 300 + 40 + 5 = 12345