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About TDEE.TECH

Our Mission

TDEE.TECH was built with a single mission: make evidence-based fitness science accessible to everyone, completely free, with no signup required and no personal data collected beyond what's needed to display anonymous usage statistics.

Too many fitness apps hide basic calorie calculations behind a paywall or harvest your personal data to serve targeted ads. We believe knowing how many calories your body needs is fundamental health literacy — it should be as easy and free as checking the weather.

Who We Are

We are a small team of fitness enthusiasts and software developers passionate about translating peer-reviewed nutrition science into practical, easy-to-use web tools. Our calculators are used daily by people in the United States, United Kingdom, Canada, and Australia who are working toward fat loss, muscle gain, or long-term health maintenance.

What We Build

Every formula we implement is sourced from published clinical studies and validated medical literature:

  • TDEE Calculator — Mifflin-St Jeor equation (1990), the most validated BMR formula for modern adults
  • BMI Calculator — World Health Organization (WHO) standard
  • Calorie Deficit Calculator — Based on the 3,500 kcal/lb of fat research
  • Macro Calculator — ISSN and ACSM protein/carb/fat guidelines
  • Ideal Weight Calculator — Hamwi (1964) and Devine (1974) formulas
  • Body Fat Calculator — U.S. Navy circumference method

Our Commitment to Accuracy

All calculators provide population-level estimates. Individual metabolic rates vary due to genetics, hormonal status, medications, and lifestyle. We always recommend using our results as a starting point and adjusting based on 2–4 weeks of real-world tracking.

Advertising

TDEE.TECH displays advertisements through Google AdSense to support the cost of hosting and ongoing development. All ads are clearly labeled and separated from content. We comply fully with Google AdSense publisher policies and never place ads in ways that could result in accidental clicks.

Contact

Have a question, feedback, or found a bug? Visit our Contact page and we'll get back to you as soon as possible.