one hundred thirty-eight thousand two hundred twenty-nine and nine tenths, US American English, Number Converted (Spelled Out) in Different Letter Cases (2023)

Letter case 1 of 8
138,229.9 written out in: lowercase
all lowercase letters:

one hundred thirty-eight thousand two hundred twenty-nine and nine tenths

~ or, simpler:

one hundred thirty-eight thousand two hundred twenty-nine point nine

~ or, simpler and clearer:

one hundred thirty-eight thousand two hundred twenty-nine point nine zero

one hundred thirty-eight thousand two hundred twenty-nine point nine oh

Letter case 2 of 8
138,229.9 SPELLED OUT IN: UPPERCASE
ALL UPPERCASE LETTERS:

ONE HUNDRED THIRTY-EIGHT THOUSAND TWO HUNDRED TWENTY-NINE AND NINE TENTHS

~ or, simpler:

ONE HUNDRED THIRTY-EIGHT THOUSAND TWO HUNDRED TWENTY-NINE POINT NINE

~ or, simpler and clearer:

ONE HUNDRED THIRTY-EIGHT THOUSAND TWO HUNDRED TWENTY-NINE POINT NINE ZERO

ONE HUNDRED THIRTY-EIGHT THOUSAND TWO HUNDRED TWENTY-NINE POINT NINE OH

Letter case 3 of 8
138,229.9 Converted to: Title Case
Capital Letters at the Beginning of the Main Words:

One Hundred Thirty-Eight Thousand Two Hundred Twenty-Nine and Nine Tenths

~ or, simpler:

One Hundred Thirty-Eight Thousand Two Hundred Twenty-Nine Point Nine

~ or, simpler and clearer:

One Hundred Thirty-Eight Thousand Two Hundred Twenty-Nine Point Nine Zero

One Hundred Thirty-Eight Thousand Two Hundred Twenty-Nine Point Nine Oh

Letter case 4 of 8
138,229.9: Sentence case
Capital letter only at the beginning of the sentence:

One hundred thirty-eight thousand two hundred twenty-nine and nine tenths

~ or, simpler:

One hundred thirty-eight thousand two hundred twenty-nine point nine

~ or, simpler and clearer:

One hundred thirty-eight thousand two hundred twenty-nine point nine zero

One hundred thirty-eight thousand two hundred twenty-nine point nine oh

Letter case 5 of 8
138,229.9: Start Case
Capital Letters At The Beginning Of Each Word:

One Hundred Thirty-Eight Thousand Two Hundred Twenty-Nine And Nine Tenths

~ or, simpler:

One Hundred Thirty-Eight Thousand Two Hundred Twenty-Nine Point Nine

~ or, simpler and clearer:

One Hundred Thirty-Eight Thousand Two Hundred Twenty-Nine Point Nine Zero

One Hundred Thirty-Eight Thousand Two Hundred Twenty-Nine Point Nine Oh

oneHundredThirtyEightThousandTwoHundredTwentyNineAndNineTenths

~ or, simpler:

oneHundredThirtyEightThousandTwoHundredTwentyNinePointNine

~ or, simpler and clearer:

oneHundredThirtyEightThousandTwoHundredTwentyNinePointNineZero

oneHundredThirtyEightThousandTwoHundredTwentyNinePointNineOh

Letter case 7 of 8
138,229.9: hyphen-case
spaces - replaced - by - hyphens:

one-hundred-thirty-eight-thousand-two-hundred-twenty-nine-and-nine-tenths

~ or, simpler:

one-hundred-thirty-eight-thousand-two-hundred-twenty-nine-point-nine

~ or, simpler and clearer:

one-hundred-thirty-eight-thousand-two-hundred-twenty-nine-point-nine-zero

one-hundred-thirty-eight-thousand-two-hundred-twenty-nine-point-nine-oh

one_hundred_thirty_eight_thousand_two_hundred_twenty_nine_and_nine_tenths

~ or, simpler:

one_hundred_thirty_eight_thousand_two_hundred_twenty_nine_point_nine

~ or, simpler and clearer:

one_hundred_thirty_eight_thousand_two_hundred_twenty_nine_point_nine_zero

one_hundred_thirty_eight_thousand_two_hundred_twenty_nine_point_nine_oh

The decimal number 138,229.9 written out in: 'lowercase', 'UPPERCASE', 'Title Case', 'Sentence case', 'Start Case', 'camelCase', 'hyphen-case' and 'snake_case'.

Notes on the Letter Cases used to write out in words the number above:

• 1: Lowercase: only lowercase letters are used. Example: 'seventy-six and two tenths'.
• 2: Uppercase: only uppercase letters are used. Example: 'SEVENTY-SIX AND TWO TENTHS'.
• 3. Title Case: the first letters of the words are capitalized, except for certain short words, such as articles, conjunctions and short prepositions, 'a', 'an', 'the', 'and', 'but', 'for', 'at', 'by', 'to', 'or', 'in', etc. Example: 'Seventy-Six and Two Tenths'.
• 4. Sentence case: only the first letter of the first word at the beginning of the sentence is capitalized. Example: 'Seventy-six and two tenths'.
• 5. Start Case: the first letter of each word is capitalized without any exception. Example: 'Seventy-Six And Two Tenths'.
• 6. Camel Case: text has no spaces nor punctuation and the first letter of each word is capitalized except for the very first letter in the series. Example: 'seventySixAndTwoTenths'.
• Pascal Case: See the Camel Case above, but the first letter is also capitalized. Example: 'SeventySixAndTwoTenths'.
• 7. Hyphen Case: text has no spaces nor punctuation and the words are delimited by hyphen. Example: 'seventy-six-and-two-tenths'. Hyphen Case can be lowercase or uppercase.
• 8. Snake Case: text has no spaces nor punctuation and the words are delimited by underscore. Example: 'seventy_six_and_two_tenths'. Snake Case can be lowercase or uppercase.

Notes on Writing Out Numbers:

• 1: It's correct to hyphenate all compound numbers from twenty-one (21) through ninety-nine (99). The hyphen is the minus sign, as in 'thirty-four' (34).
• 2: In American English, unlike British English, when writing out natural numbers of three or more digits, the word 'and' is not used after 'hundred' or 'thousand': so it is 'one thousand two hundred thirty-four' and not 'one thousand two hundred and thirty-four'.
• 3. Do not use commas when writing out in words numbers above 999: so it is 'one thousand two hundred thirty-four' and not 'one thousand, two hundred thirty-four'.
• 4. Instead, use commas when writing in digits numbers above 999: 1,234; 43,290; 1,000,000 etc.

Operations of the same kind, with similar numbers:

Write out (convert) the decimal number 138,229.8 in words, in (US) American English (spelled out with letters)

Write out (convert) the decimal number 138,230.6 in words, in (US) American English (spelled out with letters)

1. How to convert natural numbers (positive integers) to (US) American English words, how to write them out (spell them out)?

1.1. To know how to write a number in words we must know the place value of each digit.

• For example, the number 12,345 has a 1 in the ten thousands place, a 2 in the thousands place, a 3 in the hundreds place, a 4 in the tens place and a 5 in the ones place.
• 12,345 in words =
• = one ten thousands (10,000) + two thousands (2,000) + three hundreds (300) + four tens (40) + five ones
• = ten thousands (10,000) + two thousands (2,000) + three hundreds (300) + four tens (40) + five ones
• = ten thousand + two thousand + three hundred + forty + five
• = (ten + two) thousand + three hundred + forty-five
• = twelve thousand + three hundred + forty-five
• = just remove the plus sign, +, and get the number written out in words
• = twelve thousand three hundred forty-five.

2. When to write out numbers in words?

• Spell out all numbers beginning a sentence, "Forty years ago,..." Not "40 years ago,...".
• The Chicago Manual of Style calls for the numbers zero through one hundred to be written out - this would include forms like "one hundred million".
• Using words to write short numbers makes your writing look clean and classy. In handwriting, words are easy to read and hard to mistake for each other. Writing longer numbers as words isn't as useful, but it's good practice while you're learning.
• Otherwise, clarity should matter, for example when two numbers are used in a row allways spell one out: "They needed five 2-foot copper pipes to finish the job. There were 15 six-foot tall men on the basketball team roster.".
• Be consistent within a sentence, phrase... Do not write "... one million people..." and "... 1,000,000 cars..."; stick to one or another, not both.

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