Spell the ordinal number 1 500 016 656 656 565 955 989 898 995 989 895 989 989 564 646 646 464 656 536 664 949 959 959 595 995 959 595 965 646 464 664 646 466 456 565 656 665 656 666 565 656 656 565 653 535 333 386 868 686 686 464 664 646 465 665 656 656 567 656 565 656 569 895 989 959 598 998 989 959 565 646 646 565 656 566 565 656 889 898 644 664 464 665 646 466 467 664 646 463 434 346 566 520th: converted to US American English words, how to write it out

Convert 1 500 016 656 656 565 955 989 898 995 989 895 989 989 564 646 646 464 656 536 664 949 959 959 595 995 959 595 965 646 464 664 646 466 456 565 656 665 656 666 565 656 656 565 653 535 333 386 868 686 686 464 664 646 465 665 656 656 567 656 565 656 569 895 989 959 598 998 989 959 565 646 646 565 656 566 565 656 889 898 644 664 464 665 646 466 467 664 646 463 434 346 566 520th to (US) American English words:

lowercase: one duononagintillion five hundred unnonagintillion sixteen nonagintillion six hundred fifty-six novemoctogintillion six hundred fifty-six octooctogintillion five hundred sixty-five septenoctogintillion nine hundred fifty-five sexoctogintillion nine hundred eighty-nine quinoctogintillion eight hundred ninety-eight quattuoroctogintillion nine hundred ninety-five treoctogintillion nine hundred eighty-nine duooctogintillion eight hundred ninety-five unoctogintillion nine hundred eighty-nine octogintillion nine hundred eighty-nine novemseptuagintillion five hundred sixty-four octoseptuagintillion six hundred forty-six septenseptuagintillion six hundred forty-six sexseptuagintillion four hundred sixty-four quinseptuagintillion six hundred fifty-six quattuorseptuagintillion five hundred thirty-six treseptuagintillion six hundred sixty-four duoseptuagintillion nine hundred forty-nine unseptuagintillion nine hundred fifty-nine septuagintillion nine hundred fifty-nine novemsexagintillion five hundred ninety-five octosexagintillion nine hundred ninety-five septensexagintillion nine hundred fifty-nine sexsexagintillion five hundred ninety-five quinsexagintillion nine hundred sixty-five quattuorsexagintillion six hundred forty-six tresexagintillion four hundred sixty-four duosexagintillion six hundred sixty-four unsexagintillion six hundred forty-six sexagintillion four hundred sixty-six novemquinquagintillion four hundred fifty-six octoquinquagintillion five 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 twentieth

UPPERCASE: ONE DUONONAGINTILLION FIVE HUNDRED UNNONAGINTILLION SIXTEEN NONAGINTILLION SIX HUNDRED FIFTY-SIX NOVEMOCTOGINTILLION SIX HUNDRED FIFTY-SIX OCTOOCTOGINTILLION FIVE HUNDRED SIXTY-FIVE SEPTENOCTOGINTILLION NINE HUNDRED FIFTY-FIVE SEXOCTOGINTILLION NINE HUNDRED EIGHTY-NINE QUINOCTOGINTILLION EIGHT HUNDRED NINETY-EIGHT QUATTUOROCTOGINTILLION NINE HUNDRED NINETY-FIVE TREOCTOGINTILLION NINE HUNDRED EIGHTY-NINE DUOOCTOGINTILLION EIGHT HUNDRED NINETY-FIVE UNOCTOGINTILLION NINE HUNDRED EIGHTY-NINE OCTOGINTILLION NINE HUNDRED EIGHTY-NINE NOVEMSEPTUAGINTILLION FIVE HUNDRED SIXTY-FOUR OCTOSEPTUAGINTILLION SIX HUNDRED FORTY-SIX SEPTENSEPTUAGINTILLION SIX HUNDRED FORTY-SIX SEXSEPTUAGINTILLION FOUR HUNDRED SIXTY-FOUR QUINSEPTUAGINTILLION SIX HUNDRED FIFTY-SIX QUATTUORSEPTUAGINTILLION FIVE HUNDRED THIRTY-SIX TRESEPTUAGINTILLION SIX HUNDRED SIXTY-FOUR DUOSEPTUAGINTILLION NINE HUNDRED FORTY-NINE UNSEPTUAGINTILLION NINE HUNDRED FIFTY-NINE SEPTUAGINTILLION NINE HUNDRED FIFTY-NINE NOVEMSEXAGINTILLION FIVE HUNDRED NINETY-FIVE OCTOSEXAGINTILLION NINE HUNDRED NINETY-FIVE SEPTENSEXAGINTILLION NINE HUNDRED FIFTY-NINE SEXSEXAGINTILLION FIVE HUNDRED NINETY-FIVE QUINSEXAGINTILLION NINE HUNDRED SIXTY-FIVE QUATTUORSEXAGINTILLION SIX HUNDRED FORTY-SIX TRESEXAGINTILLION FOUR HUNDRED SIXTY-FOUR DUOSEXAGINTILLION SIX HUNDRED SIXTY-FOUR UNSEXAGINTILLION SIX HUNDRED FORTY-SIX SEXAGINTILLION FOUR HUNDRED SIXTY-SIX NOVEMQUINQUAGINTILLION FOUR HUNDRED FIFTY-SIX OCTOQUINQUAGINTILLION FIVE 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 TWENTIETH

Title Case: One Duononagintillion Five Hundred Unnonagintillion Sixteen Nonagintillion Six Hundred Fifty-Six Novemoctogintillion Six Hundred Fifty-Six Octooctogintillion Five Hundred Sixty-Five Septenoctogintillion Nine Hundred Fifty-Five Sexoctogintillion Nine Hundred Eighty-Nine Quinoctogintillion Eight Hundred Ninety-Eight Quattuoroctogintillion Nine Hundred Ninety-Five Treoctogintillion Nine Hundred Eighty-Nine Duooctogintillion Eight Hundred Ninety-Five Unoctogintillion Nine Hundred Eighty-Nine Octogintillion Nine Hundred Eighty-Nine Novemseptuagintillion Five Hundred Sixty-Four Octoseptuagintillion Six Hundred Forty-Six Septenseptuagintillion Six Hundred Forty-Six Sexseptuagintillion Four Hundred Sixty-Four Quinseptuagintillion Six Hundred Fifty-Six Quattuorseptuagintillion Five Hundred Thirty-Six Treseptuagintillion Six Hundred Sixty-Four Duoseptuagintillion Nine Hundred Forty-Nine Unseptuagintillion Nine Hundred Fifty-Nine Septuagintillion Nine Hundred Fifty-Nine Novemsexagintillion Five Hundred Ninety-Five Octosexagintillion Nine Hundred Ninety-Five Septensexagintillion Nine Hundred Fifty-Nine Sexsexagintillion Five Hundred Ninety-Five Quinsexagintillion Nine Hundred Sixty-Five Quattuorsexagintillion Six Hundred Forty-Six Tresexagintillion Four Hundred Sixty-Four Duosexagintillion Six Hundred Sixty-Four Unsexagintillion Six Hundred Forty-Six Sexagintillion Four Hundred Sixty-Six Novemquinquagintillion Four Hundred Fifty-Six Octoquinquagintillion Five 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 Twentieth

Sentence case: One duononagintillion five hundred unnonagintillion sixteen nonagintillion six hundred fifty-six novemoctogintillion six hundred fifty-six octooctogintillion five hundred sixty-five septenoctogintillion nine hundred fifty-five sexoctogintillion nine hundred eighty-nine quinoctogintillion eight hundred ninety-eight quattuoroctogintillion nine hundred ninety-five treoctogintillion nine hundred eighty-nine duooctogintillion eight hundred ninety-five unoctogintillion nine hundred eighty-nine octogintillion nine hundred eighty-nine novemseptuagintillion five hundred sixty-four octoseptuagintillion six hundred forty-six septenseptuagintillion six hundred forty-six sexseptuagintillion four hundred sixty-four quinseptuagintillion six hundred fifty-six quattuorseptuagintillion five hundred thirty-six treseptuagintillion six hundred sixty-four duoseptuagintillion nine hundred forty-nine unseptuagintillion nine hundred fifty-nine septuagintillion nine hundred fifty-nine novemsexagintillion five hundred ninety-five octosexagintillion nine hundred ninety-five septensexagintillion nine hundred fifty-nine sexsexagintillion five hundred ninety-five quinsexagintillion nine hundred sixty-five quattuorsexagintillion six hundred forty-six tresexagintillion four hundred sixty-four duosexagintillion six hundred sixty-four unsexagintillion six hundred forty-six sexagintillion four hundred sixty-six novemquinquagintillion four hundred fifty-six octoquinquagintillion five 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 twentieth

1 500 016 656 656 565 955 989 898 995 989 895 989 989 564 646 646 464 656 536 664 949 959 959 595 995 959 595 965 646 464 664 646 466 456 565 656 665 656 666 565 656 656 565 653 535 333 386 868 686 686 464 664 646 465 665 656 656 567 656 565 656 569 895 989 959 598 998 989 959 565 646 646 565 656 566 565 656 889 898 644 664 464 665 646 466 467 664 646 463 434 346 566 519 = ? ... 1 = ?

Converter: spell ordinal numerals to English words

The ordinal numbers are converted to English words / text in:

- lowercase (all small caps letters);

- UPPERCASE (ALL CAPITAL LETTERS);

- Title Case (Capital Letters to Start the Words);

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

Latest ordinal numbers converted to US American English words

convert ordinal number 1 500 016 656 656 565 955 989 898 995 989 895 989 989 564 646 646 464 656 536 664 949 959 959 595 995 959 595 965 646 464 664 646 466 456 565 656 665 656 666 565 656 656 565 653 535 333 386 868 686 686 464 664 646 465 665 656 656 567 656 565 656 569 895 989 959 598 998 989 959 565 646 646 565 656 566 565 656 889 898 644 664 464 665 646 466 467 664 646 463 434 346 566 520 to (US) American English words Nov 15 00:38 UTC (GMT)
convert ordinal number 444 444 444 444 444 444 444 444 444 444 444 444 444 444 444 444 444 444 444 444 444 444 444 444 444 444 444 444 444 to (US) American English words Nov 15 00:37 UTC (GMT)
convert ordinal number 372,023 to (US) American English words Nov 15 00:37 UTC (GMT)
convert ordinal number 353 to (US) American English words Nov 15 00:37 UTC (GMT)
convert ordinal number 19,996 to (US) American English words Nov 15 00:37 UTC (GMT)
convert ordinal number 3,396 to (US) American English words Nov 15 00:36 UTC (GMT)
convert ordinal number 22,501 to (US) American English words Nov 15 00:35 UTC (GMT)
convert ordinal number 789 056 785 487 966 666 663 547 839 870 609 785 346 978 543 967 843 777 777 777 777 777 777 777 777 777 777 777 777 777 777 777 777 777 777 777 777 534 699 998 079 234 589 723 487 922 720 345 789 437 895 097 423 597 842 354 325 792 058 794 327 958 493 278 888 888 888 843 333 333 333 333 333 333 333 333 333 334 356 783 549 763 456 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 999 993 497 to (US) American English words Nov 15 00:34 UTC (GMT)
convert ordinal number 64 to (US) American English words Nov 15 00:34 UTC (GMT)
convert ordinal number 51 to (US) American English words Nov 15 00:34 UTC (GMT)
convert ordinal number 666,566,595,695,959,564 to (US) American English words Nov 15 00:31 UTC (GMT)
convert ordinal number 34,793 to (US) American English words Nov 15 00:28 UTC (GMT)
convert ordinal number 73,121 to (US) American English words Nov 15 00:27 UTC (GMT)
All users converted ordinal numbers

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;

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