Q. When referencing years do I need to spell out the numbers if under 10 or for an example can I use 2-6 years?

Which is correct 2-6 years or two-six years?


To properly use numbers is APA style:

  • Use numerals to express numbers 10 and above
  • Use words to express numbers below 10
  • However, APA does allow for special circumstances. Section 4.31 (c) provides for use of numerals when the number "immediately precedes a unit of measure." 

In your example, 2-6 years, years would be considered a unit of measure and so using the numerals is appropriate. 

For other APA questions, visit the APA Help guide.

Thank you for using ASK US. Please contact your Campus Librarians for additional assistance. 


  • Last Updated Sep 16, 2019
  • Views 227
  • Answered By Baker Librarians

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