The new best TDEE calculator in the game.

Most online TDEE calculators suffer from the exact same user-input bottleneck: they force you to pick between four vague, highly subjective activity checkboxes (e.g., "Lightly Active" vs. "Moderately Active"). This forces everyone to guess their baseline, which fundamentally corrupts the downstream calculations before they even begin.

To fix this, I built an adaptive TDEE calculator that replaces those generic checkboxes entirely with an integrated AI engine. Instead of picking a static multiplier, you describe your regular daily movement, training protocols, and lifestyle factors in natural language. The AI parses this qualitative description to map out a precise, granular activity profile.

Once the AI establishes those input parameters, they are processed through exact, deterministic mathematical formulas rather than static population-wide averages like a default Mifflin-St Jeor equation. The core calculation logic:

• Prioritizes lean body mass over raw scale weight to establish a highly accurate foundational baseline.

• Dynamically models ongoing metabolic adaptation over time.

• Accounts for specific biological variables that carry sharp energetic costs, such as the direct metabolic impact of regular plasma donation.

Every formula, modifier, and calculation used under the hood is strictly research-grounded and mapped back to peer-reviewed nutritional science literature, which I have cited transparently right in the application's footer.

The site is launching tomorrow, but the infrastructure is completely live at https://www.thetdee.com/

I would love to gather some early feedback from the community here. What are your thoughts on using an LLM input parser to replace legacy categorical checkboxes? Are there any specific hidden metabolic variables or tracking metrics you would want to see integrated into the core formula next?