Numbers

Master the Irish numbering system: cardinal numbers, ordinal numbers, personal numbers (áireamh daoine), fractions, and counting rules.

  1. ArticleOverviewAn overview of how numbers work in Irish, including cardinal, ordinal, and personal numbers.
  2. Article1 to 19Learn to count from 1 to 19 in Irish (Uimhreacha 1 go 19): basic counting (a haon, a dó), counting nouns, personal numbers (beirt, triúr), and ordinals (an chéad, an dara).
  3. Article20 to 99Learn how to form Irish numbers from twenty to ninety-nine, covering both the modern decimal system and the traditional vigesimal (base-20) system.
  4. Article100 to 1,000,000Learn how to write and speak large numbers in Irish from 100 to 1,000,000: hundreds (céad), thousands (míle), and millions (milliún), with abstract and ordinal forms.
  5. ArticleDeclensionIrish cardinal numbers can be treated as nouns and declined with the definite article. This page shows their forms in the nominative, genitive, and plural cases.
  6. ArticleFractionsLearn how to form and use common fractions and mixed numbers in Irish, from 'a half' to 'two and a third'.
  7. ArticleNumber SystemA comprehensive guide to the Irish number systems, including cardinal, ordinal, and personal numbers, and their grammatical rules.