1RM Calculator · TACTICAL FWN

Estimate Your One-Rep Max

Weight Lifted

Reps Performed

Formula

Estimated 1RM

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Estimated 1RM

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5RM (≈85%)

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10RM (≈70%)

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Training Percent Table

%1RM	Load (lb)	Load (kg)	Est. Reps @ Failure*

*Epley-based estimate of reps @ selected %.

Hypertrophy

~65–80% · 6–12 reps

Strength

~80–90% · 3–6 reps

Power/Max

~90–100% · 1–3 reps

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What is 1RM?

One-Rep Max (1RM) is the heaviest load you can lift once with solid form. We estimate it from a submax set using well-known formulas, so you don’t have to max out.

How to use this

Enter the heaviest weight and reps you actually completed.
Pick the formula you prefer (Epley is a solid default).
Use the percent table to build sets (e.g., 3×5 @ 85%).

Always prioritize form and recovery—percentages are guides, not rules.