AP Style Notes


  • House numbers: Always use figures. Example: 9 Morningside Circle.
  • Only abbreviate Ave. (Avenue), Blvd. (Boulevard) and St. (Street) with street numbers; spell out all others (Circle, Road, Parkway, etc.).
  • Spell out and capitalize First through Ninth when used as street names. Use figures for 10th and above. Avoid using superscript. Example: First St., 10th Ave.


  • Always use figures. A 5-year-old boy, the boy is 5 years old, the 5-year-olds.

Chapters, Pages

  • Capitalize word and use numeral. Chapter 3, Page 123.

Dates, Times

  • Do not add "st," "th," etc. to the date. Example: Dec. 1, not Dec. 1st.
  • Use colons only with times not on the hour. Example: 2 p.m., 11 a.m., 2:30 p.m., 11:30 p.m.
  • Do not use numbers with noon or midnight.
  • Use lowercase a.m., p.m., with a space before the "a" or the "p," and no space after the first period, as shown here.


  • Use all figures and spell out inches, feet, etc., to indicate depth, height, length and width. 5 inches of snow, a 5-foot man, 5 feet 6 inches tall, 6 feet wide and 5 feet high, the rug is 9 feet by 12 feet.


  • Spell out below 10. In metric system, don’t abbreviate anything unless it is film or weapons.


  • Spell out fractions less than one in text, using a hyphen. Two-thirds, four-fifths, etc. Use figures for precise amounts larger than one, converting to decimals whenever practical.


  • Spell out below 10.
  • Hyphenate the noun forms: First-grader, second-grader, 10th-grader. Also hyphenate the adjective forms: a fourth-grade student, a 12th-grade girl.


  • Spell out all numerals that begin a sentence, except a calendar year. Unless another specific rule applies, spell out whole numbers below 10 and use figures for 10 and above.
  • In a series, apply the appropriate guidelines. They have 10 cats and three dogs.


  • Always use figures with % sign. He completed 80% to 90% of the job.


  • The form: $12 million to $14 million, not: $12 to $14 million.


  • Always use figures and hyphens. A ratio of 2-to-1, or, a 2-1 ratio.


  • Always use figures, except follow the fraction rule above.
  • Do not abbreviate. 2 teaspoons, 5 cups, 1 tablespoon.


  • Always use figures. OK to abbreviate mph.

Telephone numbers

  • Ensure your phone number uses hyphens only.
  • Abbreviate and lowercase the extension abbreviation after the phone number. For example: 775-784-4040, ext. 101.


  • Always use figures, except zero. Use a word, not a minus sign to indicate temperatures below zero. The low was minus 10, or the low was 10 below zero. Temperatures fell 5 degrees. If you need to specify Fahrenheit, you have two choices.
  • Use number, space, capital F format: 56 F, 82 F. No degree “circle” is ever used.
  • Use number, followed by degrees Fahrenheit. The water was 82 degrees Fahrenheit.


  • Always use figures, spell out pounds, ounces, etc.


  • The 1980s (no apostrophe), the ‘80s (apostrophe).