Rule 1 One or two words
Spell out numbers as you can write in one
or two words.
There are twenty-six students in the class.
The arena holds fifty-five hundred people.
Rule 2 More than two Words
Use numerals for numbers of more than
The distance between the two cities is 150
Rule 3 Begins a Sentence
Spell out any number that begins a
sentence or reword the sentence so it
doesn’t begin with a number.
Four thousand two hundred eighty-three
fans attended the game.
Attendance at the game was 4,283.
Rule 4 Greater than 999,999
Use figures for numbers greater than
999,999, followed by the word million,
billion, and so on, even if the number
could be written in two words.
Rule 5 Same Kind
Numbers of the same kind should be
written in the same way. If one number
must be written as a numeral, write all the
numbers as numerals.
On September 8, 383 students voted for the
new rule, and 50 students voted against it.
Rule 6 Ordinal Numbers
Spell out ordinal numbers (first, second,
third, and so on) under one hundred.
The ninth of June will be the couple’s
twenty-fourth wedding anniversary.
Rule 7 Time of Day
Use words to write the time of day unless
you are using A.M. or P.M.
I usually go for a walk at four o’clock in the
afternoon. I return home at a quarter to
The first bell rang at 8:42 A.M., and the last
one rang at 3:12 P.M.
Use numerals to write dates, house
numbers, street numbers above ninety,
apartment and room numbers, telephone
numbers, page numbers, amounts of
money of more than two words, and
percentages. Write out the word percent.
Examples for Rule 8
On June 10, 1999, I met Jan at 41 East
329th Street in Apartment 3G. Her
telephone number is 555-2121.
Our class meets in Room 12; 55 percent
of the students are girls.
I found two dollars between page 250 and
page 251 in this book. The book’s original
price was $12.95.