ATHLETE TOOLS
ONE-REP MAX CALCULATOR
Weight and reps in, estimated 1RM and training loads out.
ESTIMATED ONE-REP MAX (AVERAGE)
92.4 kg
Epley 93.3 · Brzycki 90 · Lombardi 94
% OF 1RM
LOAD (KG)
95%
87.8
90%
83.2
85%
78.6
80%
73.9
75%
69.3
70%
64.7
65%
60.1
60%
55.5
50%
46.2
Estimates are most reliable for sets of about 2–10 reps. This is a general guide, not coaching or medical advice — build up to heavy lifts gradually.
QUICK ANSWERS
QUESTIONS & ANSWERS
How is the one-rep max estimated?
The calculator applies the Epley, Brzycki and Lombardi formulas to your weight and reps and shows each result plus their average.
How accurate is a one-rep max estimate?
Estimates are most reliable for sets of about 2 to 10 reps and get less reliable at higher reps. Treat the result as a guide, not a tested max.
Is the calculator safe to rely on for heavy lifts?
It is a general estimate, not coaching or medical advice. Build up to heavy singles gradually and use proper spotting.