1RM to Training Max & Target Weight Planner

First, the calculator determines the estimated 1RM (E1RM). If you choose a top set source, it estimates 1RM using Epley: E1RM = TopSetWeight × (1 + TopSetReps/30). Then it applies your selected intensity style to compute a Training Max (TM), and finally multiplies TM by a rep-to-percent mapping to produce target weights for 3, 5, 8, and 10 reps.

Depending on your style, the calculator may apply a TM haircut (commonly TM = 0.90 × E1RM) before computing working weights, which makes results more conservative. The rep targets use a fixed example percent mapping (different for Classic 5/3/1 vs. RPE-style vs. direct % of 1RM), so two lifters with the same 1RM can still get different bar weights if they select different styles.

If using a top set estimate, very low reps or invalid values (e.g., reps < 1) will trigger an “invalid/verify” warning because the 1RM projection becomes unreliable. If your computed TM differs a lot from your E1RM, it’s usually because the selected TM convention is doing the heavy lifting—so the tool will label the plan as TM-based vs. direct projection accordingly.

This planner converts max estimates into working weights, but it doesn’t account for fatigue, sleep, technique changes, or how the day feels. Top-set based 1RM estimates assume your top set was close to true maximal effort; longer or less-hard top sets can skew the projection, especially if you then apply a TM haircut.