edited by Meagan Ayer et al.

Cardinal and Ordinal Numbers

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133. These two series are as follows.

CARDINALORDINALROMAN NUMERALS
1. ūnus, ūna, ūnum oneprīmus, -a, -um firstI
2. duo, duae, duo twosecundus (altersecondII
3. trēs, tria threetertius thirdIII
4. quattuorquārtusIIII or IV
5. quīnquequīntusV
6. sexsextusVI
7. septemseptimusVII
8. octōoctāvusVIII
9. novemnōnus

VIIII or IX
10. decemdecimusX
11. ūndecimūndecimusXI
12. duodecim,duodecimusXII

13. tredecim 
     [decem (et) trēs]

tertius decimus 
[decimus (et) tertius]

XIII
14. quattuordecimquārtus decimusXIIII or XIV
15. quīndecimquīntus decimusXV
16. sēdecimsextus decimusXVI
17. septendecimseptimus decimusXVII

18. duodēvīgintī
     (octōdecim)

duodēvīcēnsimus
(octāvus decimus)

XVIII

19. ūndēvīgintī
     (novendecim)

ūndēvīcēnsimus 
(nōnus decimus)

XVIIII or XIX
20. vīgintī

vīcēnsimus
(vīgēnsimus)

XX

21. vīgintī ūnus 
     [ūnus (etvīgintī, etc.]

vīcēnsimus prīmus 
[ūnus (et) vīcēnsimus, etc.]

XXI
30. trīgintātrīcēnsimusXXX
40. quadrāgintāquadrāgēnsimusXXXX or XL
50. quīnquāgintāquīnquāgēnsimus↓ or L
60. sexāgintāsexāgēnsimusLX
70. septuāgintāseptuāgēnsimusLXX
80. octōgintāoctōgēnsimusLXXX
90. nōnāgintānōnāgēnsimusLXXXX or XC
100. centumcentēnsimusC
101. centum (et) ūnus, etc.centēnsimus prīmus, etc.CI
200. ducentī, -ae, -aducentēnsimusCC
300. trecentītrecentēnsimusCCC
400. quadringentīquadringentēnsimusCCCC
500. quīngentīquīngentēnsimusD
600. sescentīsescentēnsimusDC
700. septingentīseptingentēnsimusDCC
800. octingentīoctingentēnsimusDCCC
900. nōngentīnōngentēnsimusDCCCC
1000. mīllemīllēnsimus∞ (CIϽ) or M
5000. quīnque mīlia (mīllia)quīnquiēns mīllēnsimusIϽϽ
10,000. decem mīlia (mīllia)deciēns mīllēnsimusCCIϽϽ
100,000. centum mīlia (mīllia)centiēns mīllēnsimusCCCIϽϽϽ

Note 1— The forms in -ēnsimus are often written without the n:

vīcēsimus, etc.

Note 2— The forms octōdecim, novendecim are rare, duodēvīgintī (two from twenty), ūndēvīgintī (one from twenty), being used instead. So 28, 29; 38, 39; etc. may be expressed either by the subtraction of two and one or by the addition of eight and nine respectively.

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Roman Numerals

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Suggested Citation

Meagan Ayer, Allen and Greenough’s New Latin Grammar for Schools and Colleges. Carlisle, Pennsylvania: Dickinson College Commentaries, 2014. ISBN: 978-1-947822-04-7. http://dcc.dickinson.edu/grammar/latin/cardinal-and-ordinal-numbers