# How to convert ordinal numerals to (US) American English words, how to write them down using letters instead of numerals

### How to write ordinal numbers (those denoting order) down in words?

#### Most ordinal numbers end in "th", so just add "th" to the end of the cardinal number (those denoting quantity, ex: 1 one, 2 two, 3 three, 4 four, ... etc.):

- cardinal: 4 = four -> ordinal: 4th = fourth
- cardinal: 7 = seven -> ordinal: 7th = seventh
- cardinal: 10 = ten -> ordinal: 10th = tenth
- cardinal: 19 = nineteen -> ordinal: 19th = nineteenth
- cardinal: 100 = one hundred -> ordinal: 100th = (one) hundredth
- cardinal: 1,000 = one thousand -> ordinal: 1,000th = (one) thousandth

### Exceptions:

- cardinal: 1 = one -> ordinal: first = 1st
- cardinal: 2 = two -> ordinal: second = 2nd
- cardinal: 3 = three -> ordinal: third = 3rd
- cardinal: 5 = five -> ordinal: fifth = 5th
- cardinal: 8 = eight -> ordinal: eighth = 8th
- cardinal: 9 = nine -> ordinal: ninth = 9th
- cardinal: 12 = twelve -> ordinal: twelfth = 12th
- cardinal: 20 = twenty -> ordinal: twentieth = 20th
- cardinal: 30 = thirty -> ordinal: thirtieth = 30th
- cardinal: 40 = forty -> ordinal: fortieth = 40th
- cardinal: 50 = fifty -> ordinal: fiftieth = 50th
- cardinal: 60 = sixty -> ordinal: sixtieth = 60th
- cardinal: 70 = seventy -> ordinal: seventieth = 70th
- cardinal: 80 = eighty -> ordinal: eightieth = 80th
- cardinal: 90 = ninety -> ordinal: ninetieth = 90th

### Full article: how to write ordinal numbers out in (US) American English words, using letters instead of numerals

### Here there are a couple of the main ordinal numbers, from 1st up to 19th, you can find a longer list in the full article:

- cardinal: 1 = one;

ordinal: 1st = first; - cardinal: 2 = two;

ordinal: 2nd, second; - cardinal: 3 = three;

ordinal: 3rd, third; - cardinal: 4 = four;

ordinal: 4th, fourth; - cardinal: 5 = five;

ordinal: 5th, fifth; - cardinal: 6 = six;

ordinal: 6th, sixth; - cardinal: 7 = seven;

ordinal: 7th, seventh; - cardinal: 8 = eight;

ordinal: 8th, eighth; - cardinal: 9 = nine;

ordinal: 9th, ninth; - cardinal: 10 = ten;

ordinal: 10th, tenth; - cardinal: 11 = eleven;

ordinal: 11th, eleventh; - cardinal: 12 = twelve;

ordinal: 12th, twelfth; - cardinal: 13 = thirteen;

ordinal: thirteenth; - cardinal: 14 = fourteen;

ordinal: 14th, fourteenth; - cardinal: 15 = fifteen;

ordinal: 15th, fifteenth; - cardinal: 16 = sixteen;

ordinal: 16th, sixteenth; - cardinal: 17 = seventeen;

ordinal: 17th, seventeenth; - cardinal: 18 = eighteen;

ordinal: 18th, eighteenth; - cardinal: 19 = nineteen;

ordinal: 19th, nineteenth;