About TDEEmacro

Our Mission

TDEEmacro exists to democratize nutrition science. We believe that accurate, interconnected calorie and macro calculators should be free, accessible, and private—requiring no registration, no subscription, and no compromises on your data security.

What We Build

TDEEmacro is an ecosystem of science-backed calculators spanning every stage of the fitness journey:

• Energy & Weight: TDEE, BMI, Ideal Weight, Maintenance Calories, and Weight Tracking
• Fat Loss & Cutting: Calorie Deficit Slider, Goal Date Predictor, Reverse Dieting, and Refeed Day Protocol
• Macros & Special Needs: Protein Calculator, Per-Meal Protein Distribution, Water Intake, Lean Bulk, Intermittent Fasting, Creatine Dosing, Postpartum Nutrition, and GLP-1/Ozempic Calorie Protection
• Body & Performance: US Navy Body Fat %, Waist-to-Hip Ratio, and One Rep Max (1RM) Estimator

Why Interconnected?

Most calculator websites are disconnected silos—you enter your stats once, and they're gone. TDEEmacro is different. Our synchronized user-context layer means:

• Enter your age, gender, weight, height, and activity level once
• Your stats automatically carry forward into all calculators across the suite
• No re-entry, no confusion—just seamless calculation
• Your data stays in your browser; we never store it on our servers

Science-Backed Formulas

Every calculator on TDEEmacro uses peer-reviewed, gold-standard formulas:

• Mifflin-St Jeor equation for basal metabolic rate (BMR)
• Harris-Benedict corrections for activity multipliers
• Katch-McArdle for body-fat-adjusted TDEE
• Peer-reviewed protocols for special populations (postpartum, GLP-1 users)

Editorial & Review Process

TDEEmacro covers health, calorie, and body-composition topics, so we maintain a transparent editorial process. Every calculator and article is written by the TDEEmacro editorial team and reviewed against peer-reviewed primary sources before publication.

• Who writes it: the TDEEmacro editorial team (nutrition and fitness enthusiasts, coaches, and engineers)
• Review process: formulas verified against peer-reviewed primary sources, safety floors checked, and guidance updated when the scientific consensus changes
• Last review date: 2026-08-09
• Not medical advice: no content on this site is a substitute for advice from a licensed healthcare provider

Our formulas rely on primary research, including the Mifflin-St Jeor equation (Am J Clin Nutr, 1990), the protein-muscle meta-analysis of Morton et al. (Br J Sports Med, 2018), and the ISSN creatine position stand (J Int Soc Sports Nutr, 2017).

Privacy & Data Security

We don't sell your data. We don't track you. We don't need to log in. All calculations happen in your browser using your device's local storage. When you close the browser, your stats remain saved locally—they never leave your computer unless you choose to share them.

Our Team

TDEEmacro is built by nutrition enthusiasts, fitness coaches, and software engineers who believe fitness should be accessible to everyone. We're committed to accuracy, transparency, and continuous improvement.