Latin numbers are usually adjectives. When there are three forms, the Latin number has a masculine, feminine, and neuter form, in that order. The numbers follow the appropriate declension rules. Note that there is no singular form for most of the numbers and no plural form for the number 1.
Here are the cardinal of counting numbers, the "one", "two", "three", etc. of Latin, English, and major Romance languages. For the Latin numbers for "first", "second", "third", etc., see the Latin Ordinal Numbers.
Romance Languages: Counting Numbers
| Eng | Latin | French | Italian | Spanish | |
| 1 | one | unus | un | uno | uno |
| 2 | two | duo | deux | due | dos |
| 3 | three | tres | trois | tre | tres |
| 4 | four | quattuor | quatre | quattro | cuatro |
| 5 | five | quinque | cinq | cinque | cinco |
| 6 | six | sex | six | sei | seis |
| 7 | seven | septem | sept | sette | siete |
| 8 | eight | octo | huit | otto | ocho |
| 9 | nine | novem | neuf | nove | nueve |
| 10 | ten | decem | dix | dieci | diez |
For contrast with another Indo-European language, the Sanskrit numbers are:
- éka
- dvi
- trí
- catúr
- pañca
- ṣáṣ
- saptá
- aṣṭá
- náva
- dasa
