The spreadsheet to calculate the updated version of the Nutri-Score validated by the 7 countries that adopted it (France, Belgium, Germany, Spain, Luxemburg, the Netherlands, Switzerland) and the updated FAQ with the calculation methods of the new algorithm are on the website of the French Public Health Agency (Santé Publique France) https://www.santepubliquefrance.fr/en/nutri-score
https://www.santepubliquefrance.fr/media/files/02-determinants-de-sante/nutrition-et-activite-physique/nutri-score/nutri-score-calculation-tool-for-the-updated-algorithm
Picture of the spreadsheet to calculate the updated Nutri-Score
The update of the Nutri-Score by the european scientific committee (with independant experts of the 7 countries that have adopted it) improves its performances and allow a better alignment between the classification by Nutri-Score and food-based dietary guidelines. Some examples :
NUTRI-SCORE 