Best Free One Rep Max Calculator Maximize your Training

Discover the most common three methods to calculate your one rep max (1RM) for optimal strength training and performance.
The StrengthLab360 Head Coach demonstrating proper squat technique, focusing on form, depth, and muscle engagement, to inspire optimal performance in strength training.

Your one rep max (1RM) is the gold standard for measuring maximum strength in any lift. Whether you’re a competitive athlete or training for personal goals, knowing your 1RM is crucial for designing effective, personalized workout plans. Our one rep max calculator uses the three most common formulars, helping you optimize your training intensity and track progress with confidence. Ready to take your training to the next level? Calculate your 1RM now.

Screenshots of the StrengthLab360 app displayed on iPhone and iPad, showcasing the periodization feature with detailed training plans and progress tracking for optimized strength development.

Transform Your Training

At StrengthLab360, we understand that every athlete is unique. That’s why our strength training app delivers personalized, science-backed plans that dynamically adapt to your needs, guiding you toward peak performance. Whether you’re focused on hypertrophy, powerlifting, or hybrid training, our specialized programs and algorithms are designed to help you excel. The auto-regulating algorithm based on your feedback, ensures your progress is always optimized for maximum results.

Cutting-Edge Workout Algorithm
Backed by cutting-edge science, our system adapts in real-time, keeping you on track for consistent, measurable progress. Take your performance to the next level with personalized insights and smarter programming.
Cross-Platform Accessibility
Access your training platform on iPhone, Android, tablet, or desktop—online or offline. Plan, optimize, and track your progress effortlessly, wherever your journey takes you.
Real-Time Performance Analytics
Get actionable insights into your training with real-time metrics. Monitor your progress, optimize performance, and stay on track to achieve your strength goals with precision.
Elite CompetitionPrep Tools
Design your mesocycles and macrocycles with ease using our cutting-edge competition prep algorithm. Whether you’re a powerlifter or bodybuilder, our science-backed system dynamically adjusts your progress throughout the season, ensuring you peak exactly when it matters most. Take control of your training and dominate your competition.
Get the App