One-rep max · Epley estimate
One-rep max · Epley estimate: use lifted load, completed repetitions. Review the formula, worked example and calculation steps.
Inputs
Use the units shown—
Enter your values and select Calculate.
Formula & explanation
Estimated1RM = load ×(1+repetitions/30)
Variables & units
- Lifted load
- kg · minimum 0, maximum 1000000000000
- Completed repetitions
- Numeric value · minimum 1, maximum 10
Worked example
Use the example inputs to explore this model; the solution shows each supplied quantity.
Assumptions
Epley estimate for2–10 repetitions; one completed rep returns its actual load. An estimate does not establish a safe training load.
Formula version 1.0.0. JavaScript floating-point arithmetic applies. Results display up to 6 decimal places; stored values retain available precision. Use the units shown.
Practice with an example
Use the default input values to find the answer. The reset icon restores those values.
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