Work out serving size standardisation instantly with clear inputs, formula shown and shareable results.
Serving size must be based on the reference amount customarily consumed for the food category, expressed in whole discrete units where the food comes in units. The serving weight is then the nearest whole number of units to the reference amount, and nutrient values per serving scale from the per-100-gram figures.
Serving size
Units per serving = round(reference amount / unit weight); serving weight = units x unit weight
Per serving
Nutrient per serving = nutrient per 100 g x serving weight / 100
Serving size determination is prescribed by labelling regulation, including reference amounts and dual-column requirements. Confirm the rules for your market.
Not freely. It must follow the regulated reference amount for the food category, which prevents artificially small servings being used to make nutrient values look favourable.
Where the package contains less than about two reference amounts, rules generally require it to be labelled as a single serving, with dual-column labelling in some cases.