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 numbers, the "one", "two", "three", etc. of Latin. For the "first", "second", "third", etc., see the Latin Ordinal Numbers.


1 - unus, una, unum

2 - duo, duae, duo

3 - tres, tres, tria

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

21 - viginti unus

30 - triginta

40 - quadraginta

50 - quinquaginta

60 - sexaginta

70 - septuaginta

80 - octoginta

90 - nonaginta

100 - centum

200 - ducenti, ducentae, ducenta

300 - trecenti, trecentae, trecenta

400 - quadrigenti, quadrigentae, quadrigenta(*)

500 - quingenti, quingentae, quingenta

600 - sescenti, sescentae, sescenta

700 - septingenti, septingentae, septingenta

800 - octingenti, octingentae, octingenta

900 - nongenti, nongentae, nongenta

1000 - mille

2000 - duo milia

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 Sanskritnumbers (and Hindi) are:

1. éka (ek)
2. dvi (do)
3. trí (tin)
4. catúr (char)
5. pañca (pa?c)
6. ?á? (cha?)
7. saptá (sat)
8. a??á (a?h)
9. náva (nau)
10. dasa (das)

Please let me know if I have made a mistake here.

Take the Cardinal Numbers Quiz

Related:

• Latin adjectives for information about using the correct form of a number/adjective
  
• Latin Gender for the 3 genders.
  
• Roman Numerals
  
• Comparison of Italian and Latin Numbers
  
• Roman Fractions