Master Your Metabolism
Stop guessing. Start tracking. Use science-backed tools to calculate your daily calorie needs and plan your nutrition for muscle gain or fat loss.
Everything You Need to Reach Your Goals
TDEE Calculator
Determine exactly how many calories you burn in a day based on your unique profile.
Macro Split Planner
Get a personalized breakdown of Protein, Fats, and Carbs for your specific goal.
Body Fat Estimator
Estimate your body fat percentage using the U.S. Navy Method from home.
Workout Planner
Generate a training split that fits your schedule and experience level.
Why Calorie Lab?
We believe fitness tools should be free, accurate, and easy to use. No paywalls for basic health data. Just clear, actionable numbers to help you take control of your physique.
🛡️ Privacy First
We don’t store your health data. All calculations happen in your browser.
🔬 Science Backed
All our tools and guides are backed by verifiable science and link to authoritative sources wherever possible.
Growing Library of Resources
We're constantly adding new evidence-based guides on nutrition, training, and supplementation to help you make informed decisions.
Check back often! We are actively expanding our tools and articles every week to give you the most comprehensive fitness toolkit available completely for free.