How to Write Numbers in Words: A Comprehensive Guide

Whether you are writing a check, drafting a legal document, or encountering numbers in everyday life, knowing exactly how to write numbers in words is an essential skill. While it might seem straightforward, there are numerous stylistic rules, hyphenation guidelines, and grammatical nuances that can easily trip up even experienced writers. In this comprehensive guide, we will break down the fundamental rules for spelling out numbers, explore how to tackle large figures, provide practical examples for check writing, and cover common pitfalls to avoid.

General Rules for Spelling Out Numbers

The Basic “One to Nine” Rule

In most formal writing, the standard rule of thumb is to spell out numbers from zero to nine, and use numerals for numbers 10 and above. For example:

• I have three apples.
• There are 24 students in the classroom.

However, keep in mind that different style guides (like APA, Chicago, or MLA) have their own variations. Some prefer spelling out numbers up to one hundred. Always consult your specific style guide if you are writing for publication or academia.

Beginning of a Sentence

One strict rule across almost all style guides is that you should never begin a sentence with a numeral. If a number starts a sentence, it must be spelled out completely, regardless of its size.

• Incorrect: 150 people attended the seminar.
• Correct: One hundred fifty people attended the seminar.

If the number is extremely large and cumbersome to write out, it is often better to rewrite the sentence so that the number does not appear at the beginning.

Writing Large Numbers in Words

When you move beyond the basics and start writing large numbers, hyphenation and conjunctions come into play.

Hyphenation Rules

You must hyphenate all compound numbers from twenty-one to ninety-nine. This rule applies whether these numbers stand alone or are part of a larger number.

• 45 = Forty-five
• 99 = Ninety-nine

When you write numbers in the hundreds, thousands, or millions, do not hyphenate the larger magnitude words. For example:

• 345 = Three hundred forty-five (Not three-hundred-forty-five)
• 5,231 = Five thousand two hundred thirty-one

The Word “And”

In American English, the word “and” is typically only used before a fraction or a decimal point, and should generally be omitted when writing out whole numbers.

• American English: One hundred fifty (Not one hundred and fifty)
• British English: One hundred and fifty

In British, Australian, and Canadian English, it is standard practice to include “and” after the word “hundred” or “thousand” when smaller numbers follow.

How to Write Numbers on Checks

Writing a check is one of the most common real-world scenarios where you must write out a number accurately to prevent fraud or confusion. Here is a step-by-step guide on how to do it correctly.

1. Write the numeric amount: In the small box on the right side of the check, write the amount in numerals (e.g., $1,250.75).
2. Write the spelled-out amount: On the line ending with “Dollars,” write out the dollar amount in words, followed by the word “and,” and then write the cents as a fraction out of 100.

Example 1: A check for $1,250.75 You would write: One thousand two hundred fifty and 75/100

Example 2: A check for $400.00 You would write: Four hundred and 00/100

Drawing a line through any remaining blank space after your spelled-out number is a great practice to ensure no one can alter the amount.

Writing Decimals and Fractions in Words

Fractions

When spelling out fractions, use a hyphen between the numerator and the denominator, unless one of them already contains a hyphen.

• 1/3 = One-third
• 2/5 = Two-fifths
• 5/21 = Five twenty-firsts (Notice the hyphen is in twenty-first, so we do not hyphenate between five and twenty-first).

Decimals

When writing decimals in words, read the decimal point as “point” or “and,” and read the digits individually or by their place value.

• 3.14 = Three point one four
• 0.5 = Zero point five or Five tenths

Common Mistakes to Avoid

1. Misspelling “Forty”: A very common mistake is spelling the number 40 as “fourty.” Remember, the “u” is dropped. It is always forty.
2. Misspelling “Ninety”: Unlike forty, ninety keeps its “e.” Do not write “ninty.”
3. Pluralizing magnitudes incorrectly: When stating a specific number, do not add an “s” to hundred, thousand, or million. Write “Five million” (not Five millions). You only pluralize these words when referring to an indefinite amount, such as “Millions of people.”
4. Over-hyphenating: As mentioned earlier, only hyphenate numbers between 21 and 99.

Conclusion

Writing numbers in words can be tricky, but mastering these simple rules ensures your formal documents, checks, and essays remain professional and clear. The next time you find yourself stuck on a complicated number, remember these guidelines on hyphenation, the use of “and,” and formatting large figures.

If you ever need to quickly verify that you have spelled a large or complicated number correctly, be sure to use our number to words converter tool. It provides instant, accurate conversions to help you avoid mistakes and write with absolute confidence!