One-rep max (1RM)

Epley + Brzycki → percentage table

Input

%kg
100%100,3
95%95,3
90%90,3
85%85,3
80%80,3
75%75,2
70%70,2
65%65,2
60%60,2

1RM

Epley 101,3 / Brzycki 99,3

100,3 кг

average of two formulas

Formulas: Epley = w×(1+r/30), Brzycki = w×36/(37−r). Formula divergence <3% up to 10 reps; beyond 12 reps accuracy drops. Working percentages: strength 85–95%×3–5, hypertrophy 65–80%×8–12, endurance <65%×15+.