- Spell out all numbers from one to nine; use figures for any number 10 or above, except at the beginning of a sentence. This includes ordinal numbers: first, 1st; 20th, not twentieth, unless it's an official title or data point).
- Do not use superscript in ordinals. (e.g. 20th, not 20th).
- Use figures for decimals or compound fractions.
- Numbers in the millions should be written out as a combination of words and figures.
- Don’t use "over" or "under" to describe numbers. Use "more than" or "less than".
- Use figures in sequences such as chapters, acts of a play, school grades, highways, etc.
- Use figures in ordered lists.
- Unit 12
- first-year students
- teams of 16
- 20 million people
- 6 1/2 weeks to go
- more than $4.5 million in sales
- children in Grade 4
- Act 2, Scene 3 of Hamlet
See also Dates and Time
Use this format: 519-888-4567, ext. 35719
For international audiences, add a "+1-" in front of the telephone number. (Country code for Canada.) E.g. +1-519-888-4567
- When referring to amounts of money, use a singular verb.
- Do not use unnecessary zeroes.
- Don’t use "over" or "under" to describe amounts. Use "more than" or "less than".
- Don’t use periods in national currency designations.
- Hyphenate millions of dollars when part of a compound modifier.
Examples: $7 (not $7.00). $65 CAD, $52 USD. More than $5 million was raised for the fund for writers. Construction of the $70-million building. The $33-million donation.
View the ISO 4217 Currency Codes to see international currency designations.