Data sources & attribution

Every number on WIMSTA comes from a published source we can name. Formulas are cited on each calculator and on the method page; the datasets behind the food diary are credited and licensed here.

Formulas & health norms

Body-fat, BMI, waist-to-height, heart-rate and protein figures are computed from peer-reviewed formulas, each with its primary citation and verification status on the method page. Healthy body-fat ranges follow Gallagher D. et al. (2000), Am J Clin Nutr 72(3):694–701.

Food data

The food database is built offline from several public sources, each kept with its origin badge so you always see where a food came from:

USDA FoodData Central — SR Legacy and Foundation Foods, generic whole foods. A work of the U.S. Government, in the public domain (no usage restriction). Source: fdc.nal.usda.gov.
Open Food Facts — branded and barcoded products. Contains information from Open Food Facts, which is made available under the Open Database License (ODbL) v1.0. The database is licensed under the ODbL and its contents under the Database Contents License; any derived database we publish stays under the same terms. openfoodfacts.org · ODbL v1.0. When you scan a barcode we don’t yet hold, we look it up live in Open Food Facts — only the barcode is sent, never the camera image.
BEDCA (Base de Datos Española de Composición de Alimentos) — traditional Spanish foods. Used with permission; will appear here with full attribution once integrated.
Your own foods — items you add are private to your account and are not part of the public database.

Weather

The weather→weight observation uses historical daily temperatures from Open-Meteo, available under CC-BY 4.0, fetched by date and your chosen city. The city is optional; no location is tracked, and the temperatures are cached only against your own account.

Exercise & activity

Calorie burn in the exercise diary is estimated from MET values in the 2024 Adult Compendium of Physical Activities — the standard reference for the energy cost of human activity, usable in commercial fitness apps with attribution. Its authors describe MET as a population estimate, which is exactly why we show burn as a range, not a single number (see why calories burned are a range).

Herrmann SD, Willis EA, Ainsworth BE, et al. 2024 Adult Compendium of Physical Activities. Journal of Sport and Health Science. 2024;13(1):6–12. doi:10.1016/j.jshs.2023.10.010 · pacompendium.com.

Corrections

Found a wrong value or a missing credit? Email hello@wimsta.com — attribution and data accuracy matter to us. See also our legal & privacy page.