About the service
FATSL helps you turn nutrition labels and receipt prices into values for your portion, recipe or a common unit for comparison.
Calculate portion macros, recipe costs, cost per 100 kcal and cost per 10 g of protein. Build a food basket and compare foods on the same basis.
The catalogue currently contains 218 food entries. Search indexing is limited to pages with a useful purpose and the reviewed data needed to support it.
Food preparation, weight, units and the price date all matter. An unknown value stays unknown; it is not treated as zero.
Use your own label or receipt for a more accurate calculation. Your prices and saved calculations stay in your browser.
FATSL is a reference and calculation tool. It does not diagnose conditions, prescribe diets or replace individual advice from a qualified professional.
Comparisons show the result of the chosen formula and inputs. They are not recommendations to buy a particular food.
Choose a calculator and check your inputs before saving the result.