Nutrition & Training Tools

Numbers Beat Guesses.

Seven calculators built for athletes and lifters who want to know their numbers.

  • TDEE and macros to set your nutrition baseline

  • Two body fat estimation methods to track composition

  • FFMI to measure where your physique stacks against natural genetic potential

  • 1RM, RPE, and Wilks for the strength side of the house.

  • Every formula is research validated. Every output is a starting point you verify against the only thing that matters, which is what your body and your bar are doing over the next three weeks.

The P365 Toolbox

Every number in this system traces back to something you measured. Use the tools below to establish your baselines, set your working loads, and track your body composition.

1. TDEE & P365 Macro Generator

2. U.S. Navy Body Fat Calculator

3. 7-Point Caliper (Jackson-Pollock)

4. FFMI (Fat-Free Mass Index)

5. Epley 1RM & P365 Training Max (TM)

6. RPE / RIR Target Locator

7. Wilks Score (Relative Strength - Classic)

Disclaimer: The calculators provided on this site are for educational purposes. Formulas used (Mifflin-St Jeor, Epley, Jackson-Pollock, Siri, Wilks, Kouri FFMI) are scientific models but provide estimates. Individual biology varies. Always consult a healthcare professional before making significant diet or training changes.