One rep max calculator.
Your estimated 1RM from any set, without risking your neck under a barbell. The Epley formula, a Brzycki cross-check and the load table to program your training.
The estimate is reliable with sets of 2 to 8 reps taken close to failure (RPE 8+). Beyond 12 reps the math overestimates: this calculator, like DAWT, stops there.
Your load table
Percentages of your 1RM are the language of programming: each load zone trains a different quality. This table updates with your max:
| % 1RM | Load | Typical reps | Quality trained |
|---|
How to estimate your max without testing it
Do a set with a weight you can handle for 3-8 clean reps, close to your limit but without breaking technique. The Epley formula, 1RM = weight × (1 + reps/30), converts that performance into your theoretical max. The Brzycki formula, weight × 36 / (37 − reps), is the cross-check: if the two estimates are close, the number is solid.
A direct max test only makes sense if you compete: for everyone else it's risk without reward, because the estimate drives your programming exactly the same way. Inside DAWT your estimated 1RM updates itself with every set you log: the progress charts show you how it grows over time, exercise by exercise.
Want to sharpen your technique before loading up? The DAWT guides to the big lifts:
DAWT calculates your 1RM on every set. And decides the next load.
You log weight, reps and effort: the AI coach auto-regulates your loads, alerts you to records and rewrites your plan around your real numbers. Download the app and start free.
