The cardinal numbers (one, two, three, etc.) are adjectives referring to quantity, and the ordinal numbers (first, second, third, etc.) refer to distribution.
| 1 | one | first |
| 2 | two | second |
| 3 | three | third |
| 4 | four | fourth |
| 5 | five | fifth |
| 6 | six | sixth |
| 7 | seven | seventh |
| 8 | eight | eighth |
| 9 | nine | ninth |
| 10 | ten | tenth |
| 11 | eleven | eleventh |
| 12 | twelve | twelfth |
| 13 | thirteen | thirteenth |
| 14 | fourteen | fourteenth |
| 15 | fifteen | fifteenth |
| 16 | sixteen | sixteenth |
| 17 | seventeen | seventeenth |
| 18 | eighteen | eighteenth |
| 19 | nineteen | nineteenth |
| 20 | twenty | twentieth |
| 21 | twenty-one | twenty-first |
| 22 | twenty-two | twenty-second |
| 23 | twenty-three | twenty-third |
| 24 | twenty-four | twenty-fourth |
| 25 | twenty-five | twenty-fifth |
| 26 | twenty-six | twenty-sixth |
| 27 | twenty-seven | twenty-seventh |
| 28 | twenty-eight | twenty-eighth |
| 29 | twenty-nine | twenty-ninth |
| 30 | thirty | thirtieth |
| 31 | thirty-one | thirty-first |
| 40 | forty | fortieth |
| 50 | fifty | fiftieth |
| 60 | sixty | sixtieth |
| 70 | seventy | seventieth |
| 80 | eighty | eightieth |
| 90 | ninety | ninetieth |
| 100 | one hundred | hundredth |
| 500 | five hundred | five hundredth |
| 1,000 | one thousand | thousandth |
| 1,500 | one thousand five hundred, or fifteen hundred | one thousand five hundredth |
| 100,000 | one hundred thousand | hundred thousandth |
| 1,000,000 | one million | millionth |
Examples
- There are twenty-five people in the room.
- He was the fourteenth person to win the award.
- Six hundred thousand people were left homeless after the earthquake.
- I must have asked you twenty times to be quiet.
- He went to Israel for the third time this year.
