The Global Language of Business
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Tools

Our online tools make it easy for you to calculate the correct check digit, find information based on a GTIN or GLN and keep track of when you might need to change a GTIN.

Find all our self-help tools below and get moving quickly.

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Calculate your check digit

The last digit in all GS1 numbers is a check digit, which is calculated from the preceding digits. The check digit must be correct before the barcode can be read and used as a check of both the number and the barcode.

You can calculate your check digit by entering either 7, 11, 12, 13 and 17 digits in the calculator in the link below, corresponding to e.g. UPC, GTIN-8, GTIN-13, GTIN-14 and SSCC.

Check digits are calculated according to the modulus 10 algorithm.

Go to check digit calculator

When do I need to change GTINs?

In our GTIN management tool, we guide you through some simple questions and explanatory infographics and give you a clear answer to whether you should change your GTIN or not. It's easy, fast and mobile-friendly.

Go to the GTIN tool
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UNSPSC search tool - find your code

UNSPSC is a classification standard owned by UNDP and operated by GS1 US. For the Danish version of UNSPSC, GS1 Denmark is responsible for the operation.

If you're doing business with the government, UNSPSC is the most efficient, flexible and comprehensive classification system available, and many public institutions request UNSPSC codes for products.

Read more about the system and try the improved search tool.

Go to UNSPSC

GPC Browser

With the GPC Browser you can easily get an overview of the GS1 Global Product Classification and quickly find the product categories that are relevant to you.

It makes it easier to structure, compare and share product information across systems and markets so you can work more efficiently with a globally harmonized classification standard.

Go to the GPC browser
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How to move forward

If you have additional or other questions about our standards and services, you may find the answers below. You are, of course, always welcome to contact us directly.