1RM Calculator
Estimate your one-rep max from a recent working set and use the output to plan strength percentages more clearly.
Estimate your one-rep max
Use a recent working set to estimate 1RM and get quick training percentages for strength work.
Best practice
This estimate works best from controlled sets in roughly the 1 to 10 rep range.
If the set was rushed, partial, or highly fatigued, use the result as a rough anchor and not an exact testing number.
Result
Estimated one-rep max
Training percentages
Why this tool helps
A one-rep max estimate helps you anchor training loads for strength work. It is most useful when based on a solid, controlled set rather than a rushed grinder rep.
Best use cases
Strength cycle planning
Training percentage work
Bench, squat, deadlift, and press estimates
How to use it
Step 1
Enter the weight you lifted.
Step 2
Add the reps completed with good form.
Step 3
Review the estimated 1RM and the suggested training percentages.
Planning note
Use the result as a starting number, not a final prescription. Real-world adjustments still depend on performance, recovery, appetite, schedule, and consistency over time.
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