Subscriber Login

Forgotten your password?


Expressing Quantities 

Units of Measure

Phil B. Fontanarosa

and Stacy Christiansen

Arabic numerals are used for quantities with units of measure (see , Numbers and Percentages, Use of Numerals). By SI convention, it is preferable to use only numbers between 0.1 and 1000 and to use the appropriate prefix for expressing quantities. For example, 0.003 mL is expressed as 3 μL; 15 000 g is expressed as 15 kg. Some clinical measurements are expressed in quantities and units that may have numbers outside this preferred range. For such values, the use of scientific notation is acceptable.20 000 000 A may be expressed as 20 million amperes or as 2 × 107

AMA Manual of Style requires a subscription or purchase to access the full text of books within the service. Public users can however freely search the site and view the abstracts and keywords for each book and chapter.

Please, subscribe or login to access full text content.

If you think you should have access to this title, please contact your librarian.

To troubleshoot, please check our FAQs, and if you can't find the answer there, please contact us .