Strength1RM

Strength 1RM is a focused one-rep max (1RM) calculator for strength training. Enter your weight and reps to quickly estimate your 1RM and get practical training load guidance. You can compare multiple proven formulas in one place, including Brzycki, Epley, O'Conner, Lombardi, and Mayhew. Each method includes context on use cases and references to help you interpret results more confidently. Great for: Strength and hypertrophy training Lifters who want safer load planning Anyone tracking progress with evidence-based estimates Key features: Fast 1RM estimation (kg / lb) Multi-formula comparison for transparency Training suggestions based on your estimated 1RM Easy result sharing Disclaimer: This app provides training guidance only and is not medical advice. Train according to your readiness, recovery, and movement quality.