RepMax: 1RM Calculator & PR

RepMax is the essential strength training tool for athletes who need precision and focus. It's a powerful,
offline-first 1RM calculator designed to help you accurately estimate your strength potential and track
your personal records without the bloat of complex workout loggers. Get the data you need, when you
need it, and get back to lifting.
Accurate Strength Calculation
• Estimate your one-rep max using a selection of proven formulas like Epley, Brzycki, and Lombardi,
ensuring you get a reliable projection of your true strength potential for any major lift.
• Go beyond simple rep counts by factoring in your daily readiness with integrated Reps in Reserve (RIR)
and Rate of Perceived Exertion (RPE) scales, providing a more nuanced and accurate 1RM estimate.
• Instantly generate comprehensive working weight tables, breaking down percentages from 50% to 95%
of your calculated max, which is crucial for structuring effective percentage-based training programs.
• See your estimated rep maxes for different rep ranges (e.g., your estimated 3RM, 5RM, 8RM) to help
you plan your sets, push your limits safely, and understand your strength curve across various intensities.
• Our core function is a robust and flexible 1RM calculator you can trust for every session, whether you're
finding your starting numbers or an advanced lifter testing your peak strength.
Barbell & Plate Math Simplified
• Visualize the exact combination of Olympic plates needed on each side of the barbell to hit your target
weight, removing all guesswork and preventing loading errors that can disrupt your focus.
• Eliminate slow, distracting mental math between heavy sets. Instead of fumbling with your phone's
calculator, get an instant visual breakdown so you can stay in the zone and manage your rest periods
effectively.
• Spend less time calculating and more time training. This tool is designed for speed and clarity in the
gym environment, ensuring your workflow from one set to the next is as efficient as possible.
• The PRO version allows you to create and save custom plate inventories, perfect for lifters who train
at gyms with non-standard plates or have a specific set of equipment in their home gym.
Track & Share Your Progress
• Save your successful sets by exercise to build a complete, detailed history of your personal records
(PRs) over time. See how far you've come and pinpoint exactly when you hit your biggest numbers.
• Tap any entry in your history log to instantly reload the weight and reps back into the calculator. This
is perfect for warm-up calculations or for attempting to break a previous record.
• Generate clean, minimalist, and branded share cards of your PRs with a single tap. Post them on social
media to celebrate your milestones with your friends, coach, or training partners.
• This is more than a simple 1RM calculator; it’s a dedicated record of your achievements, helping you
stay motivated by making your progress tangible and easy to review.
Tools For Competitive Powerlifters
Beyond its function as a 1RM calculator, RepMax PRO offers specialized tools for serious athletes
preparing for competition or just wanting to measure their strength by official standards.
• Calculate official powerlifting scores including DOTS, Wilks, and IPF GL points to accurately gauge
your performance relative to your bodyweight and see how you would rank in a competition.
• Use the included strength standards to contextualize your performance, see where you stand, and set
meaningful long-term goals for your training.
• Monitor your bodyweight with the integrated tracker, which uses visual charts to show trends over time.
This is essential for managing weight classes and understanding how body composition impacts your
strength.
Private & Focused By Design
• Works 100% offline with no account, registration, or login required.