One Rep Max (1RM) Calculator - Epley & Brzycki Strength Formula
Calculate your one-rep max (1RM) for bench press, squat, and deadlift using proven Epley and Brzycki strength equations with training percentages.
Average of Epley and Brzycki strength equations
Percentage of 1RM Training Weights
About One Rep Max (1RM) Calculator - Epley & Brzycki Strength Formula
Scientific, 100% client-side calculator for one rep max calculator. Calculations execute strictly inside your browser sandbox with zero telemetry or network calls.
Supported Health & Fitness Queries
- +one rep max calculator
- +1rm calculator bench press
- +epley formula 1rm
- +brzycki 1rm formula
- +strength percentage chart
- +max lift calculator
Architecture & Privacy Guarantees
✓ 100% Private & Client-Side Sandbox
Your personal health metrics (weight, age, body dimensions) never leave your device. Complete medical confidentiality guaranteed.
⚡ Zero Latency & Science-Backed Formulas
Uses validated physiological equations (Mifflin-St Jeor, US Navy, Epley & Brzycki) rendered in sub-millisecond execution.