VBT-to-1RM Calculator
Enter your lift weight and bar velocity to get a research-backed estimate of your one-rep max. No maxing out required — just one good set.
Your Lift Data
Estimated 1-Rep Max
315 lbs
That lift was ~71% of your estimated 1RM
% of 1RM
71.4%
Training Zone
Strength-Speed
Load-Velocity Profile
☝️ Drag across the chart to explore different velocities
Force-Velocity Spectrum
Strength-Speed Zone
Want to know what to do with this number?
Brad reviews these metrics with clients every session. If you want a coach who actually uses your data — not just sends a program — book a free intro session.
Book Your Free Intro Session!What is VBT?
Velocity-Based Training (VBT) uses bar speed to measure how hard a lift actually is — in real time. Instead of guessing based on RPE or percentage charts, you get objective data on every rep.
Each exercise has a Minimum Velocity Threshold (MVT) — the slowest speed at which you can still complete a rep. By measuring your bar speed on a submaximal set, we can estimate your true 1RM without ever maxing out.
This calculator uses research-backed load-velocity equations from González-Badillo, García-Ramos, and other published studies to convert your velocity reading into an estimated one-rep max.