Our Mission: Demystifying Human Metabolism
Welcome to TDEE Calculator Online. We believe that fitness shouldn't be a guessing game.
In an industry filled with fad diets, "magic" pills, and conflicting advice, we set out to build a platform rooted in one thing: Science. Our mission is to bridge the gap between complex metabolic data and your daily plate, empowering you to make decisions based on biology, not marketing.
Who We Are
We are a team of data enthusiasts, developers, and fitness advocates who were tired of the status quo. We noticed that most online calorie calculators were either too simple to be accurate or too complex to be usable. They would give you a number, but no plan on how to use it.
We built TDEE Calculator Online to change that. We combined clinical-grade formulas with modern user experience design to create a tool that is precise, accessible, and completely free.
The Problem We Solve
Most people fail at their health goals because of the "Execution Gap."
- •The Math Gap: You know you need to lose weight, but you don't know your exact metabolic baseline (BMR).
- •The Activity Gap: You don't know how to account for your desk job vs. your gym sessions (TDEE).
- •The Nutrition Gap: You have a calorie number, but you don't know what groceries to buy to hit it.
Our ecosystem—from the Advanced TDEE Calculator to our new Nutrition Dashboard—closes these gaps. We don't just tell you how much to eat; we show you what to eat.
Our Methodology: Science First
We do not invent numbers. Our tools are built on peer-reviewed, medically validated research (read more about our accuracy in our FAQ).
Accuracy
We utilize the Mifflin-St Jeor Equation and the Harris-Benedict Equation (Revised), which are the gold standards in clinical dietetics.
Personalization
We recognize that a 25-year-old athlete and a 50-year-old office worker have vastly different needs. Our algorithms adjust for activity multipliers, body fat percentage, and specific goals like muscle hypertrophy or maintenance.
Transparency
We believe you own your data. That is why we offer features like PDF Downloads and Shareable Results, so you can take your health data to your doctor, trainer, or nutritionist.
Why Is This Free?
We believe that basic health information is a human right. Understanding your body's energy requirements shouldn't be locked behind a paywall. While we may introduce premium features in the future, our core calculator and meal planning tools remain free to ensure everyone has access to the tools they need to live a healthier life.
Join Us on Your Journey
Whether you are stepping into a gym for the first time, preparing for a bodybuilding competition, or simply trying to feel better in your daily life, we are honored to be a part of your journey.
Trust the math. Trust the process. Still have questions? Visit our Frequently Asked Questions page to learn more.
The TDEE Calculator Online Team