Calculate Your Lifts With Precision
Professional barbell calculators for powerlifters and athletes. Determine plate loading, estimate your one-rep max, and plan your training progression—all with science-backed formulas.
Core Tools
Essential Calculators
The most used tools for strength training. Fast, accurate, and free.
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Why Use These Tools
Built for Serious Training
Every calculator is designed with accuracy and usability in mind. No clutter, no distractions—just the tools you need.
Science-Based Formulas
All calculators use peer-reviewed research and validated equations from strength science.
Free, No Sign-up
Access all tools instantly. No account required, no hidden costs.
Works Offline
Calculators work in your browser. Use them anywhere, even without internet.
Remembers Your Settings
Your preferences (kg/lb, bar weight) are saved for next time.
1RM Formulas Used
Epley: 1RM = W × (1 + r/30)
Brzycki: 1RM = W × (36/(37-r))
Lombardi: 1RM = W × r^0.10
Example Calculation
From 275 lbs × 5 reps
Start Calculating Now
All calculators are free to use with no sign-up required. Get accurate results in seconds.