What we do
gym.diet brings together interactive calculators — calories, macros, protein, body composition, strength — with a meal planner, a food database and plain-English summaries of supplements, diets and training-nutrition topics.
We don't invent recommendations. Every formula and range on this site comes from peer-reviewed studies, position stands from organisations such as the International Society of Sports Nutrition and the American College of Sports Medicine, and public bodies such as the USDA, EFSA, NIH and WHO. Each page lists its sources so you can check them.
What we don't do
We are not doctors or dietitians and we don't give personal medical or dietary advice. We present what openly published research considers optimal for healthy adults who train, on average. Read our disclaimer.
How the site is funded
Everything is free and will stay free: no accounts, no subscriptions, no paid plans. The site is supported by advertising (Google AdSense). Advertisers have no influence on content, evidence grades or recommendations, and we don't sell supplements.
Privacy first
Calculators run entirely in your browser. The details you enter are stored only in your own browser's local storage so you don't have to type them twice. See the privacy policy.
Found a mistake?
Research moves on, and so do we. If you spot an error or an outdated source, please tell us.