Good Weighing Practice (GWP) is a global standard that ensures consistent accuracy, quality and compliance in any weighing process. Established in 2007 by METTLER TOLEDO, GWP is a standardized methodology for the secure selection, calibration and operation of weighing equipment. GWP’s risk-based approach ensures that all your balances and scales meet your own accuracy requirements and adhere to quality standards such as ISO, GMP and GLP. It is applicable to new or existing weighing equipment from any manufacturer in any industry or workplace.

Good Weighing Practice is part of Good Measuring Practices by METTLER TOLEDO. It is a global program supporting you in quality assurance measures in laboratory and production environments. 

METTLER TOLEDO created GWP to help you with your entire weighing program and support product quality, regulatory compliance and business expense reduction. We can help with everything from finding the right device for your specific needs to making sure that device remains fit-for-purpose and accurate over time. With our GWP program, it is possible to increase your quality, reduce costs and increase profit while successfully passing audits that involve weighing equipment.

All METTLER TOLEDO devices are accurate and of the highest quality. However, are you sure your balance or scale is the correct device for the intended purpose? If not, Good Weighing Practice services can help. Also, the weighing performance of even the most accurate device changes over time. This is why weighing devices need to be maintained and tested periodically to ensure consistent accuracy.

GWP is relevant for every business where weighing is part of the value chain, whether it is in a laboratory, production environment, or other processing area. It is suitable for any weighing process and new or existing weighing equipment from any manufacturer in any industry and workplace.

• If you need a new balance or scale start at step 1 (selection)
• If you already have a device but it is not installed, start at step 2 (installation)
• If you already have an installed device, but have changed its location, changed your process requirements, or changed the weighing tasks, start at step 3 (calibration and routine testing)

 The USP sets the official public standards for drugs and drug products in the US. USP drug standards are used in more than 140 countries. Learn more about USP chapters 41 and 1251 and take an eLearning course:

• Learn more about USP Chapters 41 and 1251 on Weighing

Or learn more in our free eLearning:

• Join our "USP Chapter 41 and 1251 eLearning"

ISO 9001 is a standard that sets out the requirements for a quality management system. ISO 9001:2015 focuses on ensuring customer satisfaction and recognizes the way globalization is changing modern business. Learn about how ISO 9001 applies to measuring instruments:

• Read more on "ISO 9001:2015 – What are the implications for your measuring and weighing processes?"

The application of legal metrology rules creates very strict requirements for the weighing devices used in legal-for-trade applications. However, these requirements may fall short of your own process requirements quite severely. Learn more about applying legal metrology rules and combining them with your own process requirements:

• Learn more with our White Paper "Avoid Serious Pitfalls when Applying Legal Metrology Rules"

In a laboratory as well as in production, weighing is only one part of the analysis or production chain. Nevertheless, it is important to achieve quality and maintain consistency. Furthermore, if you are in the food industry, accurate weighing processes act as an important contribution for two of the most demanding challenges in the industry: increasing consumer safety and enhancing productivity.

• Learn more with our White Paper "Good Weighing Practice for the Food Industry"