Using numbers

Avoid starting a sentence with a number, including a year. If you must start a sentence with a number, spell it out. Otherwise, use the numeral. This includes ordinals.

• Below are the details for children 2 to 10 years of age
• I ate 3 donuts at lunch.

Sometimes it feels weird to use the numeral. If it's an expression that typically uses spelled-out numbers, leave them that way.

• A friendly smile always makes a great first impression.
• That is a third-party integration.
• Celebrate fellow WestJetters with a high-five.

Numbers over 3 digits get commas.

• 999
• 1,000
• 150,000

Write out big numbers in full. Avoid the use of k to represent thousands or m to represent millions.

Use the percent symbol only when it is accompanied by a numeral; also use the symbol in table headings and in figure labels and legends to conserve space.

Phone numbers

Phone numbers always include the area code. Use a dash (with no space between the dash) to separate each segment; 1 is only used before toll-free and international numbers.

• 403-444-2600
• 1-888-937-8538