How to use the One Rep Max Calculator
Estimate estimated one-rep max from lifted weight, repetitions with the One Rep Max Calculator. It includes Epley, Brzycki, Lander, Lombardi workflows, so choose the one that matches the values you actually know. Use it to understand an educational estimate and the inputs behind it, not as a diagnosis or treatment decision.
Step by step
- For the One Rep Max example, select Epley and enter lifted weight, repetitions. Keep each value in the unit displayed beside its field.
- Review the selected One Rep Max workflow and inputs, then read estimated one-rep max in the result panel.
- Change one One Rep Max assumption at a time to compare scenarios. Use Reset to restore this tool's worked example values.
How the calculation works
Selectable Epley, Brzycki, Lander, and Lombardi one-repetition maximum estimates.
Worked example
To reproduce the One Rep Max worked example, reset the calculator. Select the Epley workflow. Use lifted weight 100 kg; repetitions 5. The result is estimated one-rep max of 116.66666667 kg. Epley equation. Review the displayed units before comparing the result.
Understanding the result
The One Rep Max reports estimated one-rep max. Use it to understand an educational estimate and the inputs behind it, not as a diagnosis or treatment decision. Educational estimate only; it cannot diagnose a condition or replace advice from a qualified health professional.
How to check the answer
Check the One Rep Max estimate by confirming the units and supported ranges for lifted weight, repetitions. Compare estimated one-rep max with another published method or direct measurement when available, and ask a clinician before using it for a health decision.
Common questions
What does the One Rep Max calculate?
Estimate estimated one-rep max from lifted weight, repetitions with the One Rep Max Calculator.
Which inputs does the One Rep Max example use?
The worked example uses lifted weight, repetitions in the Epley workflow. Other workflows can show different fields. Keep the chosen workflow and units with the result when comparing calculations.
Is the One Rep Max result exact?
Educational estimate only; it cannot diagnose a condition or replace advice from a qualified health professional. Recheck lifted weight, repetitions and use estimated one-rep max only for a decision where that level of precision is appropriate.