basic

Rep Weight from 1RM Calculator

Working weight for a target rep range from your 1RM.

Compute the working weight at a chosen number of reps from your 1-rep max using a standard percentage table (e.g., 5 reps ≈ 87 % 1RM, 10 reps ≈ 75 % 1RM).

Marcus Laurent By Marcus Laurent
Published Last reviewed 1 min read

Inputs

lb

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Weight = 1RM · pct/100. Default percentages from common strength-training tables.

In depth

Compute the working weight at a chosen number of reps from your 1-rep max using a standard percentage table (e.g., 5 reps ≈ 87 % 1RM, 10 reps ≈ 75 % 1RM).