The P365 Toolbox
Most training programs ask for your 1RM. POWERBUILDING 365 doesn't. Your 1RM is a one-rep maximum pulled on your best day with everything right. It's a terrible number to program from because you can't repeat it week after week without burning out or stalling. The Calibrated Max is different. It's your top set of 3 at RPE 8. A clean triple with two reps left in the tank. Reproducible. Programmable. The working number that governs every top set in the block. Enter yours below. Every week calculates from this one input. 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.
Jump To A Tool
1. TDEE Data Point One & P365 Macro Generator
This is Data Point One of the two-modality method: the formula estimate. The book's full method requires Data Point Two, a seven-day tracking week with daily weigh-ins, then averaging the two. The formula alone is a starting estimate, not your confirmed TDEE.
2. U.S. Navy Body Fat Calculator
3. 7-Point Caliper (Jackson-Pollock)
4. FFMI (Fat-Free Mass Index)
5. P365 Calibrated Max & Working Percentages
Pick your block first. The Strength Block calculates an estimated 1RM from your RPE 8 calibration triple and sets that as the Training Max. The Recomp and Fat Loss Blocks run their percentages directly against your tested 3RM weight, not against a calculated 1RM. These are different systems by design. Mixing them wrecks both.
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.