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 15 science-backed calculators spanning every stage of the fitness journey:

• Energy & Weight: TDEE, BMI, Maintenance Calories, and Weight Tracking
• Fat Loss & Cutting: Calorie Deficit Slider, Goal Date Predictor, Reverse Dieting, and Refeed Day Protocol
• Macros & Special Needs: Per-Meal Protein Distribution, Lean Bulk, Intermittent Fasting, Creatine Dosing, Postpartum Nutrition, and GLP-1/Ozempic Calorie Protection

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 15 calculators
• 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)

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.