ToolGrid AIEstimated One Rep Max
Estimate a one-repetition maximum using the Epley formula for 1–10 repetitions.
Runs entirely in your browser — your selected files are not uploaded by this tool. Device-provided speech voices may use online services.
About this free estimated one rep max tool
Estimate a one-repetition maximum using the Epley formula for 1–10 repetitions. Calculators answer a defined arithmetic question using the values you supply. Keep units and currencies consistent, choose the correct starting amount and inspect the assumptions before using a result. Estimates do not replace a lender quotation, an official tax rate, a medical assessment or a jurisdiction-specific deadline rule.
A practical example
A concrete example uses lifted weight (kg): 60; completed repetitions: 5. The result is Estimated one-rep max (kg): 70.
Before you rely on the result
A planning estimate, not medical advice or a prescribed exercise or nutrition target. Individual needs and measured results vary. Do not attempt a maximum solely on this estimate; technique and supervision matter.