It turns guesswork into load targets
A usable max estimate gives you a base for programming. Even if you never test a true single, percentages make it easier to progress your top sets and back-off work on purpose.
1 Rep Max Calculator
Find YourTrue Strength
Enter a hard working set, pick your lift, and get an instant 1RM estimate plus training percentages you can actually use in the gym.
Bench, squat, deadlift, OHP, row
Epley + Brzycki + Lander
Instant strength percentages
Epley is shown as the headline number. The average across all three formulas is included so you can gauge the estimate against a wider formula band.
Set Input
Turn one hard set into a usable max estimate
Enter the weight you lifted, the reps you completed, and the lift you want to anchor. The result updates instantly.
Weight unit
Quick rep picks
Optional, but useful if you want the page copy to stay aligned with the lift you are testing.
Primary output
Epley stays front and center as the lead 1RM estimate.
Consensus check
Average all three formulas to see whether the estimate clusters tightly.
Use the table
Pull exact working weights for strength, hypertrophy, and conditioning blocks.
Your estimate will appear here
Plug in a hard set
Example: 100 kg for 5 reps on bench press or 225 lb for 8 reps on squat. Once the set is entered, this panel fills with your estimated max and training percentages.
Lower-rep sets produce tighter estimates
The formulas still work higher up the rep ladder, but the estimate gets wider as fatigue, pacing, and exercise technique start to drive the set more than raw strength.
Pair the number with progressive overload
Once you have a clean 1RM anchor, the real value comes from a plan that tells you how often to push, when to wave volume, and how to keep the lift moving month after month.