Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Quantities and Units for Software Product Measurements



David W. Flater


International Organization for Standardization (ISO)/International Electrotechnical Commission (IEC) 80000, the International System of Quantities, collects and organizes the most important physical quantities into a coherent system. In a similar fashion, this report collects and organizes the most important quantities used in software metrics, focusing on software as a product rather than its development process.
NIST Interagency/Internal Report (NISTIR) - 8289
Report Number


Measurement, metrics, quantities, software, units.


Flater, D. (2020), Quantities and Units for Software Product Measurements, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online], (Accessed July 19, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created March 10, 2020, Updated May 10, 2020