Of Languages and Numbers

How to count in Latin

Enter a number and get it written in full in Latin.

Language overview

Latin, also known as Roman, is an Italic language originally spoken in Latium and Ancient Rome, from II BC to II AD, then through the Middle Ages. Extinct language to the extend it has no native speaker, Latin is still one of Vatican City co-official languages (alongside with French, German and Italian).
Due to lack of data, we can only count accurately up to 9,999 in Latin. Please contact us if you can help us counting up from that limit.

Latin numbering rules

• Numbers from zero to ten are specific words, namely nulla [0], unus/una/unum (m/f/n) [1], duo/duae/duo (m/f/n) [2], tres/tres/tria (m/f/n) [3], quattuor [4], quinque [5], sex [6], septem [7], octo [8], novem [9], and decem [10].
• From eleven to seventeen, numbers are formed from the root of the digit followed by ten: undecim [11], duodecim [12], tredecim [13], quattuordecim [14], quindecim [15], sedecim [16], and septendecim [17]. Eighteen and nineteen are formed on a subtracting manner: duodeviginti [18] (literally two from twenty), and undeviginti [19] (one from twenty).
• The tens have specific names based on the matching digit root except for ten and twenty: decem [10], viginti [20], trentrigintata [30], quadraginta [40], quinquaginta [50], sexaginta [60], septuaginta [70], octoginta [80], and nonaginta [90].
• Compound numbers are formed by setting the ten, then the unit, separated with a space when the unit digit goes from one to seven, following the additive structure (e.g.: viginti unus [21], triginta duo [32]). When a compound number ends with eight or nine, the additive structure (ten plus unit) is replaced by the subtracting structure (next ten minus unit), with no space (e.g.: duodequinquaginta [48] (literally two from fifty), undesexaginta [59] (one from sixty), nonaginta octo [98] (which is an exception to the rule), undecentum [99] (one from one hundred)).
• The hundreds are formed by prefixing the word hundred by the multiplier digit root, except for one hundred: centum [100], ducenti [200], trecenti [300], quadringenti [400], quingenti [500], sescenti [600], septingenti [700], octingenti [800], and nongenti [900].
• Thousands are formed by prefixing the word thousand by the multiplier digit, except for one thousand: mille [1,000] (plural milia), duo milia [2,000], tria milia [3,000] (using the neuter from of three), quattuor milia [4,000], quinque milia [5,000]… In singular, the word mille is an indeclinable adjective, but in plural, this is a noun following the third declension neuter i-stem.

Books

Numbers list

1 – unus 2 – duo 3 – tres 4 – quattuor 5 – quinque 6 – sex 7 – septem 8 – octo 9 – novem

10 – decem 11 – undecim 12 – duodecim 13 – tredecim 14 – quattuordecim 15 – quindecim 16 – sedecim 17 – septendecim 18 – duodeviginti

19 – undeviginti 20 – viginti 30 – triginta 40 – quadraginta 50 – quinquaginta 60 – sexaginta 70 – septuaginta 80 – octoginta 90 – nonaginta

100 – centum 1,000 – mille

Romance languages

Asturian, Catalan, Corsican, Eonavian, French, French (Belgium), French (Switzerland), Friulian, Galician, Italian, Jèrriais, Ladin, Latin, Lombard (Milanese), Portuguese (Brazil), Portuguese (Portugal), Romansh, Sardinian, Spanish, Spanish (Puerto Rico), and Venetian.

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