Repetitive Strain Risk Calculator

RSI risk scoring from task frequency and force.

Repetitions per minute

Force level (1-5)

Posture deviation (1-4)

Hours of exposure

Recovery time (%)

Tab to move between fields

Strain Index

Risk level (1-3)3

Daily repetitions7,200

Recovery adequate (0/1)0

Max safe reps/min7

Intervention priority (0-100)100

How to Use This Calculator

Enter repetitions per minute and force level (1 = light to 5 = near-maximal).
Score posture deviation (1 = neutral to 4 = severe) and enter hours of daily exposure.
Enter recovery time (% of work time) available between repetitive tasks.
Read the composite RSI risk score and risk classification.
Use results to prioritize job rotation, workstation redesign, or ergonomic tool selection.

How the result changes with Hours of exposure

Repetitions per minute: Number of task repetitions per minute.
Force level (1-5): 1 = light, 2 = somewhat hard, 3 = hard, 4 = very hard, 5 = near maximal.
Posture deviation (1-4): 1 = neutral, 2 = mild deviation, 3 = moderate, 4 = severe.
Hours of exposure: Daily hours performing the repetitive task.
Recovery time (%): Percentage of work time available for recovery.

Strain Index: Moore-Garg Strain Index score (>7 = hazardous).
Risk level (1-3): 1=safe (<3), 2=borderline (3-7), 3=hazardous (>7).
Daily repetitions: Total cumulative repetitions per day.
Recovery adequate (0/1): 1 = adequate recovery time (>=15% of work time).
Max safe reps/min: Maximum recommended repetitions per minute at this force level.
Intervention priority (0-100): Urgency of ergonomic intervention.

Identify Input Parameters
4 parameters
Repetitions per minute = 15, Force level (1-5) = 2, Posture deviation (1-4) = 2, Hours of exposure = 8 = 5 input(s) provided
Calculate Strain Index
Strain Index
18 = 18
Calculate Risk level
Risk level
3 = 3
Calculate Daily repetitions
Daily repetitions
7200 = 7200