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.

Checking the Net Contents of Packaged Goods (NIST HB 133 2017)



Lisa Warfield, David Sefcik, Linda D. Crown


This handbook has been prepared as a procedural guide for the compliance testing of net contents statements on packaged goods. Compliance testing of packaged goods is the determination of the conformance results of the packaging, distribution, and retailing process (the packages) to specific legal requirements for net content declarations. This handbook has been developed primarily for the use of government officials; however, it should also be useful to commercial and industrial establishments in the areas of packaging, distribution, and sale of commodities. In conducting compliance testing, the conversion of quantity values from one measuring system to another (e.g., from the metric system to the avoirdupois system) should be handled with careful regard to the implied correspondence between accuracy of the data and the number of digits displayed. In all conversion, the number of significant digits retained should ensure that accuracy is neither sacrificed nor exaggerated. For this edition of Handbook 133, all dimensions for test procedures, devices, or environments have been rounded to two significant digits (e.g., 2.5 cm to 1.0 in) or to a precision level applicable to the test equipment (e.g., 200 kPA for 25 psi and 35 MPs for 5000 psi).
Handbook (NIST HB) - 133-2017
Report Number


packaging and labeling, package testing, measurement, compliance testing, content statement, labeling compliance, net content declarations, packaging regulations, labeling regulations


Warfield, L. , Sefcik, D. and Crown, L. (2016), Checking the Net Contents of Packaged Goods (NIST HB 133 2017), Handbook (NIST HB), National Institute of Standards and Technology, Gaithersburg, MD, [online], (Accessed February 8, 2023)
Created December 6, 2016, Updated October 12, 2021