// multi-utility computation suite · offline · instant · precise
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sport.one-rep-max Calculator
Estimates one-rep max (1RM) for any lift from a submaximal set using the Epley formula (weight × (1 + reps/30)), and generates a percentage table for programming sets at 50–95% of 1RM. Avoiding true 1RM attempts reduces injury risk while still tracking strength progress.
Inputs
Weight Lifted
Body or object weight. For health calculators, usually in kg or lbs.
Reps
Reference formula or conversion factor shown for context.
Formula
Reference formula or conversion factor shown for context.
Results
1RM estimate
The value at the specified point or condition.
Epley
Reference formula or conversion factor shown for context.
Brzycki
Reference formula or conversion factor shown for context.
Lombardi
Reference formula or conversion factor shown for context.
65% 1RM (hypertrophy)
pH of the solution. Below 7: acidic. 7: neutral. Above 7: basic (alkaline).