Ordinal numbers (rangtelwoorden) worden gevormd door -th achter een getal te plakken.
1, 2 en 3 hebben hun eigen vorm.
1 → 1st (first) 9 → 9th (ninth) 21 → 21st (twenty-first)
2 → 2nd (second) 10 → 10th (tenth) 30 → 30th (thirtieth)
3 → 3rd (third) 11 → 11th (eleventh) 100 → 100th (one hundredth)
4 → 4th (fourth) 12 → 12th (twelfth)
5 → 5th (fifth) 13 → 13th (thirteenth)
6 → 6th (sixth) 14 → 14th (fourteenth)
7 → 7th (seventh) 15 → 15th (fifteenth)
8 →8th (eighth) 20 → 20th (twentieth)