Ordinal Number 15 000 166 566 565 656 656 532 222 222 222 222 225 556 565 656 565 665 656 565 665 656 531 313 133 131 323 232 332 323 235 686 565 656 565 353 535 335 353 535 365 656 665 656 666 565 656 656 565 653 535 333 386 868 686 686 464 664 646 465 665 656 656 567 656 565 656 569 895 989 959 598 998 989 959 565 646 646 565 656 566 565 656 889 898 644 664 464 665 646 466 467 664 646 463 434 346 566 503rd, That Indicates Position or Order, Converted to Words in (US) American English, Written Out

Convert the ordinal number 15 000 166 566 565 656 656 532 222 222 222 222 225 556 565 656 565 665 656 565 665 656 531 313 133 131 323 232 332 323 235 686 565 656 565 353 535 335 353 535 365 656 665 656 666 565 656 656 565 653 535 333 386 868 686 686 464 664 646 465 665 656 656 567 656 565 656 569 895 989 959 598 998 989 959 565 646 646 565 656 566 565 656 889 898 644 664 464 665 646 466 467 664 646 463 434 346 566 503rd to (US) American English words.

The ordinal number indicates the position or order of things or objects.


lowercase:

fifteen septennonagintillion one hundred sixty-six quinnonagintillion five hundred sixty-six quattuornonagintillion five hundred sixty-five trenonagintillion six hundred fifty-six duononagintillion six hundred fifty-six unnonagintillion five hundred thirty-two nonagintillion two hundred twenty-two novemoctogintillion two hundred twenty-two octooctogintillion two hundred twenty-two septenoctogintillion two hundred twenty-two sexoctogintillion two hundred twenty-five quinoctogintillion five hundred fifty-six quattuoroctogintillion five hundred sixty-five treoctogintillion six hundred fifty-six duooctogintillion five hundred sixty-five unoctogintillion six hundred sixty-five octogintillion six hundred fifty-six novemseptuagintillion five hundred sixty-five octoseptuagintillion six hundred sixty-five septenseptuagintillion six hundred fifty-six sexseptuagintillion five hundred thirty-one quinseptuagintillion three hundred thirteen quattuorseptuagintillion one hundred thirty-three treseptuagintillion one hundred thirty-one duoseptuagintillion three hundred twenty-three unseptuagintillion two hundred thirty-two septuagintillion three hundred thirty-two novemsexagintillion three hundred twenty-three octosexagintillion two hundred thirty-five septensexagintillion six hundred eighty-six sexsexagintillion five hundred sixty-five quinsexagintillion six hundred fifty-six quattuorsexagintillion five hundred sixty-five tresexagintillion three hundred fifty-three duosexagintillion five hundred thirty-five unsexagintillion three hundred thirty-five sexagintillion three hundred fifty-three novemquinquagintillion five hundred thirty-five octoquinquagintillion three hundred sixty-five septenquinquagintillion six hundred fifty-six sexquinquagintillion six hundred sixty-five quinquinquagintillion six hundred fifty-six quattuorquinquagintillion six hundred sixty-six trequinquagintillion five hundred sixty-five duoquinquagintillion six hundred fifty-six unquinquagintillion six hundred fifty-six quinquagintillion five hundred sixty-five novemquadragintillion six hundred fifty-three octoquadragintillion five hundred thirty-five septenquadragintillion three hundred thirty-three sexquadragintillion three hundred eighty-six quinquadragintillion eight hundred sixty-eight quattuorquadragintillion six hundred eighty-six trequadragintillion six hundred eighty-six duoquadragintillion four hundred sixty-four unquadragintillion six hundred sixty-four quadragintillion six hundred forty-six novemtrigintillion four hundred sixty-five octotrigintillion six hundred sixty-five septentrigintillion six hundred fifty-six sextrigintillion six hundred fifty-six quintrigintillion five hundred sixty-seven quattuortrigintillion six hundred fifty-six tretrigintillion five hundred sixty-five duotrigintillion six hundred fifty-six untrigintillion five hundred sixty-nine trigintillion eight hundred ninety-five novemvigintillion nine hundred eighty-nine octovigintillion nine hundred fifty-nine septenvigintillion five hundred ninety-eight sexvigintillion nine hundred ninety-eight quinvigintillion nine hundred eighty-nine quattuorvigintillion nine hundred fifty-nine trevigintillion five hundred sixty-five duovigintillion six hundred forty-six unvigintillion six hundred forty-six vigintillion five hundred sixty-five novemdecillion six hundred fifty-six octodecillion five hundred sixty-six septendecillion five hundred sixty-five sexdecillion six hundred fifty-six quindecillion eight hundred eighty-nine quattuordecillion eight hundred ninety-eight tredecillion six hundred forty-four duodecillion six hundred sixty-four undecillion four hundred sixty-four decillion six hundred sixty-five nonillion six hundred forty-six octillion four hundred sixty-six septillion four hundred sixty-seven sextillion six hundred sixty-four quintillion six hundred forty-six quadrillion four hundred sixty-three trillion four hundred thirty-four billion three hundred forty-six million five hundred sixty-six thousand five hundred third

UPPERCASE:

FIFTEEN SEPTENNONAGINTILLION ONE HUNDRED SIXTY-SIX QUINNONAGINTILLION FIVE HUNDRED SIXTY-SIX QUATTUORNONAGINTILLION FIVE HUNDRED SIXTY-FIVE TRENONAGINTILLION SIX HUNDRED FIFTY-SIX DUONONAGINTILLION SIX HUNDRED FIFTY-SIX UNNONAGINTILLION FIVE HUNDRED THIRTY-TWO NONAGINTILLION TWO HUNDRED TWENTY-TWO NOVEMOCTOGINTILLION TWO HUNDRED TWENTY-TWO OCTOOCTOGINTILLION TWO HUNDRED TWENTY-TWO SEPTENOCTOGINTILLION TWO HUNDRED TWENTY-TWO SEXOCTOGINTILLION TWO HUNDRED TWENTY-FIVE QUINOCTOGINTILLION FIVE HUNDRED FIFTY-SIX QUATTUOROCTOGINTILLION FIVE HUNDRED SIXTY-FIVE TREOCTOGINTILLION SIX HUNDRED FIFTY-SIX DUOOCTOGINTILLION FIVE HUNDRED SIXTY-FIVE UNOCTOGINTILLION SIX HUNDRED SIXTY-FIVE OCTOGINTILLION SIX HUNDRED FIFTY-SIX NOVEMSEPTUAGINTILLION FIVE HUNDRED SIXTY-FIVE OCTOSEPTUAGINTILLION SIX HUNDRED SIXTY-FIVE SEPTENSEPTUAGINTILLION SIX HUNDRED FIFTY-SIX SEXSEPTUAGINTILLION FIVE HUNDRED THIRTY-ONE QUINSEPTUAGINTILLION THREE HUNDRED THIRTEEN QUATTUORSEPTUAGINTILLION ONE HUNDRED THIRTY-THREE TRESEPTUAGINTILLION ONE HUNDRED THIRTY-ONE DUOSEPTUAGINTILLION THREE HUNDRED TWENTY-THREE UNSEPTUAGINTILLION TWO HUNDRED THIRTY-TWO SEPTUAGINTILLION THREE HUNDRED THIRTY-TWO NOVEMSEXAGINTILLION THREE HUNDRED TWENTY-THREE OCTOSEXAGINTILLION TWO HUNDRED THIRTY-FIVE SEPTENSEXAGINTILLION SIX HUNDRED EIGHTY-SIX SEXSEXAGINTILLION FIVE HUNDRED SIXTY-FIVE QUINSEXAGINTILLION SIX HUNDRED FIFTY-SIX QUATTUORSEXAGINTILLION FIVE HUNDRED SIXTY-FIVE TRESEXAGINTILLION THREE HUNDRED FIFTY-THREE DUOSEXAGINTILLION FIVE HUNDRED THIRTY-FIVE UNSEXAGINTILLION THREE HUNDRED THIRTY-FIVE SEXAGINTILLION THREE HUNDRED FIFTY-THREE NOVEMQUINQUAGINTILLION FIVE HUNDRED THIRTY-FIVE OCTOQUINQUAGINTILLION THREE HUNDRED SIXTY-FIVE SEPTENQUINQUAGINTILLION SIX HUNDRED FIFTY-SIX SEXQUINQUAGINTILLION SIX HUNDRED SIXTY-FIVE QUINQUINQUAGINTILLION SIX HUNDRED FIFTY-SIX QUATTUORQUINQUAGINTILLION SIX HUNDRED SIXTY-SIX TREQUINQUAGINTILLION FIVE HUNDRED SIXTY-FIVE DUOQUINQUAGINTILLION SIX HUNDRED FIFTY-SIX UNQUINQUAGINTILLION SIX HUNDRED FIFTY-SIX QUINQUAGINTILLION FIVE HUNDRED SIXTY-FIVE NOVEMQUADRAGINTILLION SIX HUNDRED FIFTY-THREE OCTOQUADRAGINTILLION FIVE HUNDRED THIRTY-FIVE SEPTENQUADRAGINTILLION THREE HUNDRED THIRTY-THREE SEXQUADRAGINTILLION THREE HUNDRED EIGHTY-SIX QUINQUADRAGINTILLION EIGHT HUNDRED SIXTY-EIGHT QUATTUORQUADRAGINTILLION SIX HUNDRED EIGHTY-SIX TREQUADRAGINTILLION SIX HUNDRED EIGHTY-SIX DUOQUADRAGINTILLION FOUR HUNDRED SIXTY-FOUR UNQUADRAGINTILLION SIX HUNDRED SIXTY-FOUR QUADRAGINTILLION SIX HUNDRED FORTY-SIX NOVEMTRIGINTILLION FOUR HUNDRED SIXTY-FIVE OCTOTRIGINTILLION SIX HUNDRED SIXTY-FIVE SEPTENTRIGINTILLION SIX HUNDRED FIFTY-SIX SEXTRIGINTILLION SIX HUNDRED FIFTY-SIX QUINTRIGINTILLION FIVE HUNDRED SIXTY-SEVEN QUATTUORTRIGINTILLION SIX HUNDRED FIFTY-SIX TRETRIGINTILLION FIVE HUNDRED SIXTY-FIVE DUOTRIGINTILLION SIX HUNDRED FIFTY-SIX UNTRIGINTILLION FIVE HUNDRED SIXTY-NINE TRIGINTILLION EIGHT HUNDRED NINETY-FIVE NOVEMVIGINTILLION NINE HUNDRED EIGHTY-NINE OCTOVIGINTILLION NINE HUNDRED FIFTY-NINE SEPTENVIGINTILLION FIVE HUNDRED NINETY-EIGHT SEXVIGINTILLION NINE HUNDRED NINETY-EIGHT QUINVIGINTILLION NINE HUNDRED EIGHTY-NINE QUATTUORVIGINTILLION NINE HUNDRED FIFTY-NINE TREVIGINTILLION FIVE HUNDRED SIXTY-FIVE DUOVIGINTILLION SIX HUNDRED FORTY-SIX UNVIGINTILLION SIX HUNDRED FORTY-SIX VIGINTILLION FIVE HUNDRED SIXTY-FIVE NOVEMDECILLION SIX HUNDRED FIFTY-SIX OCTODECILLION FIVE HUNDRED SIXTY-SIX SEPTENDECILLION FIVE HUNDRED SIXTY-FIVE SEXDECILLION SIX HUNDRED FIFTY-SIX QUINDECILLION EIGHT HUNDRED EIGHTY-NINE QUATTUORDECILLION EIGHT HUNDRED NINETY-EIGHT TREDECILLION SIX HUNDRED FORTY-FOUR DUODECILLION SIX HUNDRED SIXTY-FOUR UNDECILLION FOUR HUNDRED SIXTY-FOUR DECILLION SIX HUNDRED SIXTY-FIVE NONILLION SIX HUNDRED FORTY-SIX OCTILLION FOUR HUNDRED SIXTY-SIX SEPTILLION FOUR HUNDRED SIXTY-SEVEN SEXTILLION SIX HUNDRED SIXTY-FOUR QUINTILLION SIX HUNDRED FORTY-SIX QUADRILLION FOUR HUNDRED SIXTY-THREE TRILLION FOUR HUNDRED THIRTY-FOUR BILLION THREE HUNDRED FORTY-SIX MILLION FIVE HUNDRED SIXTY-SIX THOUSAND FIVE HUNDRED THIRD

Title Case:

Fifteen Septennonagintillion One Hundred Sixty-Six Quinnonagintillion Five Hundred Sixty-Six Quattuornonagintillion Five Hundred Sixty-Five Trenonagintillion Six Hundred Fifty-Six Duononagintillion Six Hundred Fifty-Six Unnonagintillion Five Hundred Thirty-Two Nonagintillion Two Hundred Twenty-Two Novemoctogintillion Two Hundred Twenty-Two Octooctogintillion Two Hundred Twenty-Two Septenoctogintillion Two Hundred Twenty-Two Sexoctogintillion Two Hundred Twenty-Five Quinoctogintillion Five Hundred Fifty-Six Quattuoroctogintillion Five Hundred Sixty-Five Treoctogintillion Six Hundred Fifty-Six Duooctogintillion Five Hundred Sixty-Five Unoctogintillion Six Hundred Sixty-Five Octogintillion Six Hundred Fifty-Six Novemseptuagintillion Five Hundred Sixty-Five Octoseptuagintillion Six Hundred Sixty-Five Septenseptuagintillion Six Hundred Fifty-Six Sexseptuagintillion Five Hundred Thirty-One Quinseptuagintillion Three Hundred Thirteen Quattuorseptuagintillion One Hundred Thirty-Three Treseptuagintillion One Hundred Thirty-One Duoseptuagintillion Three Hundred Twenty-Three Unseptuagintillion Two Hundred Thirty-Two Septuagintillion Three Hundred Thirty-Two Novemsexagintillion Three Hundred Twenty-Three Octosexagintillion Two Hundred Thirty-Five Septensexagintillion Six Hundred Eighty-Six Sexsexagintillion Five Hundred Sixty-Five Quinsexagintillion Six Hundred Fifty-Six Quattuorsexagintillion Five Hundred Sixty-Five Tresexagintillion Three Hundred Fifty-Three Duosexagintillion Five Hundred Thirty-Five Unsexagintillion Three Hundred Thirty-Five Sexagintillion Three Hundred Fifty-Three Novemquinquagintillion Five Hundred Thirty-Five Octoquinquagintillion Three Hundred Sixty-Five Septenquinquagintillion Six Hundred Fifty-Six Sexquinquagintillion Six Hundred Sixty-Five Quinquinquagintillion Six Hundred Fifty-Six Quattuorquinquagintillion Six Hundred Sixty-Six Trequinquagintillion Five Hundred Sixty-Five Duoquinquagintillion Six Hundred Fifty-Six Unquinquagintillion Six Hundred Fifty-Six Quinquagintillion Five Hundred Sixty-Five Novemquadragintillion Six Hundred Fifty-Three Octoquadragintillion Five Hundred Thirty-Five Septenquadragintillion Three Hundred Thirty-Three Sexquadragintillion Three Hundred Eighty-Six Quinquadragintillion Eight Hundred Sixty-Eight Quattuorquadragintillion Six Hundred Eighty-Six Trequadragintillion Six Hundred Eighty-Six Duoquadragintillion Four Hundred Sixty-Four Unquadragintillion Six Hundred Sixty-Four Quadragintillion Six Hundred Forty-Six Novemtrigintillion Four Hundred Sixty-Five Octotrigintillion Six Hundred Sixty-Five Septentrigintillion Six Hundred Fifty-Six Sextrigintillion Six Hundred Fifty-Six Quintrigintillion Five Hundred Sixty-Seven Quattuortrigintillion Six Hundred Fifty-Six Tretrigintillion Five Hundred Sixty-Five Duotrigintillion Six Hundred Fifty-Six Untrigintillion Five Hundred Sixty-Nine Trigintillion Eight Hundred Ninety-Five Novemvigintillion Nine Hundred Eighty-Nine Octovigintillion Nine Hundred Fifty-Nine Septenvigintillion Five Hundred Ninety-Eight Sexvigintillion Nine Hundred Ninety-Eight Quinvigintillion Nine Hundred Eighty-Nine Quattuorvigintillion Nine Hundred Fifty-Nine Trevigintillion Five Hundred Sixty-Five Duovigintillion Six Hundred Forty-Six Unvigintillion Six Hundred Forty-Six Vigintillion Five Hundred Sixty-Five Novemdecillion Six Hundred Fifty-Six Octodecillion Five Hundred Sixty-Six Septendecillion Five Hundred Sixty-Five Sexdecillion Six Hundred Fifty-Six Quindecillion Eight Hundred Eighty-Nine Quattuordecillion Eight Hundred Ninety-Eight Tredecillion Six Hundred Forty-Four Duodecillion Six Hundred Sixty-Four Undecillion Four Hundred Sixty-Four Decillion Six Hundred Sixty-Five Nonillion Six Hundred Forty-Six Octillion Four Hundred Sixty-Six Septillion Four Hundred Sixty-Seven Sextillion Six Hundred Sixty-Four Quintillion Six Hundred Forty-Six Quadrillion Four Hundred Sixty-Three Trillion Four Hundred Thirty-Four Billion Three Hundred Forty-Six Million Five Hundred Sixty-Six Thousand Five Hundred Third

Sentence case:

Fifteen septennonagintillion one hundred sixty-six quinnonagintillion five hundred sixty-six quattuornonagintillion five hundred sixty-five trenonagintillion six hundred fifty-six duononagintillion six hundred fifty-six unnonagintillion five hundred thirty-two nonagintillion two hundred twenty-two novemoctogintillion two hundred twenty-two octooctogintillion two hundred twenty-two septenoctogintillion two hundred twenty-two sexoctogintillion two hundred twenty-five quinoctogintillion five hundred fifty-six quattuoroctogintillion five hundred sixty-five treoctogintillion six hundred fifty-six duooctogintillion five hundred sixty-five unoctogintillion six hundred sixty-five octogintillion six hundred fifty-six novemseptuagintillion five hundred sixty-five octoseptuagintillion six hundred sixty-five septenseptuagintillion six hundred fifty-six sexseptuagintillion five hundred thirty-one quinseptuagintillion three hundred thirteen quattuorseptuagintillion one hundred thirty-three treseptuagintillion one hundred thirty-one duoseptuagintillion three hundred twenty-three unseptuagintillion two hundred thirty-two septuagintillion three hundred thirty-two novemsexagintillion three hundred twenty-three octosexagintillion two hundred thirty-five septensexagintillion six hundred eighty-six sexsexagintillion five hundred sixty-five quinsexagintillion six hundred fifty-six quattuorsexagintillion five hundred sixty-five tresexagintillion three hundred fifty-three duosexagintillion five hundred thirty-five unsexagintillion three hundred thirty-five sexagintillion three hundred fifty-three novemquinquagintillion five hundred thirty-five octoquinquagintillion three hundred sixty-five septenquinquagintillion six hundred fifty-six sexquinquagintillion six hundred sixty-five quinquinquagintillion six hundred fifty-six quattuorquinquagintillion six hundred sixty-six trequinquagintillion five hundred sixty-five duoquinquagintillion six hundred fifty-six unquinquagintillion six hundred fifty-six quinquagintillion five hundred sixty-five novemquadragintillion six hundred fifty-three octoquadragintillion five hundred thirty-five septenquadragintillion three hundred thirty-three sexquadragintillion three hundred eighty-six quinquadragintillion eight hundred sixty-eight quattuorquadragintillion six hundred eighty-six trequadragintillion six hundred eighty-six duoquadragintillion four hundred sixty-four unquadragintillion six hundred sixty-four quadragintillion six hundred forty-six novemtrigintillion four hundred sixty-five octotrigintillion six hundred sixty-five septentrigintillion six hundred fifty-six sextrigintillion six hundred fifty-six quintrigintillion five hundred sixty-seven quattuortrigintillion six hundred fifty-six tretrigintillion five hundred sixty-five duotrigintillion six hundred fifty-six untrigintillion five hundred sixty-nine trigintillion eight hundred ninety-five novemvigintillion nine hundred eighty-nine octovigintillion nine hundred fifty-nine septenvigintillion five hundred ninety-eight sexvigintillion nine hundred ninety-eight quinvigintillion nine hundred eighty-nine quattuorvigintillion nine hundred fifty-nine trevigintillion five hundred sixty-five duovigintillion six hundred forty-six unvigintillion six hundred forty-six vigintillion five hundred sixty-five novemdecillion six hundred fifty-six octodecillion five hundred sixty-six septendecillion five hundred sixty-five sexdecillion six hundred fifty-six quindecillion eight hundred eighty-nine quattuordecillion eight hundred ninety-eight tredecillion six hundred forty-four duodecillion six hundred sixty-four undecillion four hundred sixty-four decillion six hundred sixty-five nonillion six hundred forty-six octillion four hundred sixty-six septillion four hundred sixty-seven sextillion six hundred sixty-four quintillion six hundred forty-six quadrillion four hundred sixty-three trillion four hundred thirty-four billion three hundred forty-six million five hundred sixty-six thousand five hundred third

15 000 166 566 565 656 656 532 222 222 222 222 225 556 565 656 565 665 656 565 665 656 531 313 133 131 323 232 332 323 235 686 565 656 565 353 535 335 353 535 365 656 665 656 666 565 656 656 565 653 535 333 386 868 686 686 464 664 646 465 665 656 656 567 656 565 656 569 895 989 959 598 998 989 959 565 646 646 565 656 566 565 656 889 898 644 664 464 665 646 466 467 664 646 463 434 346 566 502 = ? ... 1 = ?

Converter: Write Out Ordinal Numbers in Words in (US) American English

The ordinal numbers are converted to words in (US) American English in:

- lowercase (all small caps letters);

- UPPERCASE (ALL CAPITAL LETTERS);

- Title Case (Capital Letters at the Beginning of Words);

- And sentence case (capital letter to start the sentence).

Latest ordinal numbers converted to words in US American English

convert ordinal number 15 000 166 566 565 656 656 532 222 222 222 222 225 556 565 656 565 665 656 565 665 656 531 313 133 131 323 232 332 323 235 686 565 656 565 353 535 335 353 535 365 656 665 656 666 565 656 656 565 653 535 333 386 868 686 686 464 664 646 465 665 656 656 567 656 565 656 569 895 989 959 598 998 989 959 565 646 646 565 656 566 565 656 889 898 644 664 464 665 646 466 467 664 646 463 434 346 566 503 to (US) American English words Jul 04 20:28 UTC (GMT)
convert ordinal number 3,999,993 to (US) American English words Jul 04 20:26 UTC (GMT)
convert ordinal number 94 to (US) American English words Jul 04 20:24 UTC (GMT)
convert ordinal number 10,101,032 to (US) American English words Jul 04 20:24 UTC (GMT)
convert ordinal number 511,000,015,001,501,150,007 to (US) American English words Jul 04 20:24 UTC (GMT)
convert ordinal number 90 to (US) American English words Jul 04 20:24 UTC (GMT)
convert ordinal number 511,000,015,001,501,150,006 to (US) American English words Jul 04 20:23 UTC (GMT)
convert ordinal number 118,464 to (US) American English words Jul 04 20:23 UTC (GMT)
convert ordinal number 9,858 to (US) American English words Jul 04 20:23 UTC (GMT)
convert ordinal number 32,393 to (US) American English words Jul 04 20:23 UTC (GMT)
convert ordinal number 128,258 to (US) American English words Jul 04 20:23 UTC (GMT)
convert ordinal number 79,999,999,998 to (US) American English words Jul 04 20:23 UTC (GMT)
convert ordinal number 36 to (US) American English words Jul 04 20:23 UTC (GMT)
All users converted ordinal numbers

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

How to write out ordinal numbers (those denoting order) 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 out ordinal numbers in words in (US) American English, 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;

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