RIR Calculator
Estimate how many reps you had left in reserve from the weight used, reps performed, and your known or estimated one-rep max. The result also shows the equivalent RPE and the percentage of your 1RM used for the set.
Enter between 1 and 30 reps.
lb
Use your tested 1RM or a reliable estimated 1RM.
Estimated reps in reserve
— RIR
Enter your set details to calculate RIR.
Equivalent RPE
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% of 1RM
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Effective reps
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Estimated max reps
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How this estimate works:
% of 1RM = weight ÷ 1RM × 100
Effective reps = 1 + ln(100 ÷ % of 1RM) ÷ ln(1.025)
RIR = effective reps − reps performed
% of 1RM = weight ÷ 1RM × 100
Effective reps = 1 + ln(100 ÷ % of 1RM) ÷ ln(1.025)
RIR = effective reps − reps performed
Nearby RIR estimates
| RIR | RPE | Rep capacity | Estimated 1RM |
|---|