per100gram

Per100gram, commonly written as per 100 g or per 100 grams, is a unit used in nutrition labeling to describe the content of nutrients in a food item. It expresses the amount of a nutrient contained in 100 grams of the edible portion, regardless of the actual serving size. This standardization facilitates comparisons across different foods and brands.

Nutrition panels may report energy (calories) and nutrients per 100 g, and sometimes per 100 ml for liquids. The values are calculated for the edible portion after preparation if applicable. The per-100-g metric allows consistent assessment of nutrient density and energy density, enabling consumers to compare foods independent of packaging or serving sizes.

To convert to a specific serving size, multiply the per-100-g value by the serving mass in grams and divide by 100. Example: fat 5 g per 100 g; a 150 g serving provides 7.5 g fat.

Limitations include variation in moisture content, preparation method, and brand formulation. Some foods have significant air or water content that skews per-100-g comparisons if not standardized for edible portion. Also, regulations vary by country in how per-100-g data must be presented, and some items use per-serving data instead.

Per-100 g data is often used in dietary databases and regulatory contexts to assess nutrient density and to support dietary planning and labeling compliance.