Enter the percentage of one rep max (%) and the relative intensity of the rep (%) into the Calculator. The calculator will evaluate the Relative Intensity. 

Relative Intensity Formula

RI = 1RM / RIR

Variables:

  • RI is the Relative Intensity (%)
  • 1RM is the percentage of one rep max (%)
  • RIR is the relative intensity of the rep (%)

To calculate Relative Intensity, divide the percentage of your one rep max by the percentage intensity of the rep.

How to Calculate Relative Intensity?

The following steps outline how to calculate the Relative Intensity.


  • First, determine the percentage of one rep max (%). 
  • Next, determine the relative intensity of the rep (%). 
  • Next, gather the formula from above = RI = %1RM / RIR.
  • Finally, calculate the Relative Intensity.
  • After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

percentage of one rep max (%) = 50

relative intensity of the rep (%) = 85