STRENGTH · VELOCITY
Velocity-Based 1RM Estimator
Estimate one-rep max from mean concentric bar speed using published load-velocity profiles for squat, bench, deadlift, and overhead press.
Result
Estimated 1RM Confidence Band
Mean estimate with the ±5% load-velocity prediction interval.
Recommended velocity zone
Strength-speed (80-90% 1RM)
Velocity bands
- Max strength (90-100% 1RM): 0.15–0.45 m/s · absolute strength
- Strength-speed (80-90% 1RM): 0.45–0.65 m/s · strength under speed
- Speed-strength (60-80% 1RM): 0.65–0.95 m/s · explosive intent
- Starting strength (<60% 1RM): 0.95–1.50 m/s · speed development
How to use it
- Open Velocity-Based 1RM Estimator and enter your current baseline accurately.
- Adjust one variable at a time so changes are easy to interpret.
- Review the headline output first, then inspect supporting metrics.
- Run at least one conservative and one aggressive scenario.
- Use outputs to set your next training or nutrition action for the week.
- Save or share this setup if you want to revisit it later, then check one easier and one harder version before you change your plan.
Questions people usually ask
What is Velocity-Based 1RM Estimator best used for?
Velocity-Based 1RM Estimator helps you estimate one-rep max from concentric bar velocity using published load-velocity profiles. so you can turn estimates into practical next steps.
How do I avoid misleading results?
Use realistic baseline inputs, run multiple scenarios, and update assumptions as your training, recovery, or nutrition changes.
Is this medical advice?
No. Outputs are general planning estimates and do not replace professional medical guidance.
Is this free and private?
Yes. Tools run client-side in your browser with no signup.
Formula
See the math
The underlying formula with variables defined, derivation shown, and a worked example with units.
Related Resources
Learn the decision before you act
Every link here is tied directly to Velocity-Based 1RM Estimator. Use the explanation, formula, examples, and benchmarks to pressure-test the calculator output from first principles.
How To Use
4 STEPSHow to Use Velocity-Based 1RM Estimator
Step-by-step guide for the Velocity-Based 1RM Estimator: inputs, interpretation, and reproducibility tips.
ReadFormula
3 VARIABLESRPE to Percentage Formula (Tuchscherer)
RPE to % 1RM (Tuchscherer table). RPE 10 = 100% 1RM. Each RPE point ≈ 2-3% drop. Powerlifting autoregulation standard.
ReadFormula
4 VARIABLESVelocity-Based 1RM Formula
Velocity-based 1RM: load-velocity profile, MVT (minimum velocity threshold) per lift. González-Badillo 2010 method. Bench 0.17 m/s, squat 0.30 m/s, deadlift 0.15 m/s.
ReadRelated deep dive
All articles →Read further
Long-form context behind the calculator output.
- Article·7 min
How to Estimate a 1RM Without Testing for One
Estimate a 1RM without testing: Epley, Brzycki, Lombardi, O'Conner, Wathan, and Mayhew — error bands, rep-range fit, and safety.
Read - Pillar·13 min
Velocity-Based Training: 1RM From Bar Speed
Gonzalez-Badillo and Sanchez-Medina built a load-velocity profile that estimates 1RM from sub-maximal bar speed. The math, the citations, and a worked.
Read - Article·8 min
Epley, Brzycki, Lombardi, Lander: A Methodology Deep-Dive on 1RM Math
Epley, Brzycki, Lombardi, and Lander 1RM formulas: where each comes from, how the constants were chosen, and where they break above eight reps.
Read
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