SYNCT tools
1RM Calculator
Frequently asked questions
Epley (weight × (1 + reps/30)) and Brzycki (weight × 36 / (37 − reps)). We show both and the average. Reps are capped at 12 because estimates beyond that are unreliable.
ExRx.net weightlifting performance standards for ages 18–39, provided by Dr. Lon Kilgore, PhD. They are absolute 1RM targets by bodyweight class, not SYNCT user data. We interpolate between published classes for your exact bodyweight.
Bench press, squat, deadlift, overhead press, power clean, and power snatch — the lifts covered by the ExRx absolute tables.
No. Estimates only. If you test a true max, use a spotter and sensible loading.
Your 1RM for every lift, without the maths.
SYNCT works this out automatically from every set you log, estimated maxes for every exercise, how they’re trending, and exactly how far off your next PB you are.
