Constant-Murley Shoulder Score Calculator
Enter each section score to calculate the total Constant score (0 to 100).
What is the Constant score?
The Constant-Murley score is a widely used clinical outcome measure for shoulder function. It combines symptoms and performance into one number from 0 (worst) to 100 (best). Clinicians use it to track recovery after rotator cuff injury, shoulder surgery, arthritis treatment, and rehabilitation.
How this calculator works
This calculator adds four parts:
- Pain: 0-15 points
- Activities of daily living (ADL): 0-20 points
- Range of motion (ROM): 0-40 points
- Strength: 0-25 points
The total is the sum of these components. If you enter the opposite shoulder score, the tool also computes a relative Constant score as a percentage.
Interpreting your score
General interpretation bands
- 0-55: Poor shoulder function
- 56-70: Fair shoulder function
- 71-85: Good shoulder function
- 86-100: Excellent shoulder function
These bands are practical reference points. Different studies and clinics may use slightly different thresholds.
Why the same score can mean different things
A raw Constant score should be interpreted in context: age, baseline activity level, dominant arm, type of injury, and time since surgery or therapy. A score of 75 at week 6 can be excellent progress, while the same score at month 18 may indicate room for further treatment.
Component breakdown tips
Pain (15 points)
Pain is usually patient-reported. Lower pain intensity generally drives faster gains in function and strength.
ADL / function (20 points)
This reflects practical life impact: sleep, work, sport/recreation, and ability to position the arm for daily tasks.
Range of motion (40 points)
ROM captures active shoulder movement and often includes flexion, abduction, and rotational movements.
Strength (25 points)
Strength is often measured under standardized conditions. Consistent technique is essential for valid comparisons over time.
Best practices when tracking progress
- Use the same measurement method at every follow-up.
- Record date, pain level, and treatment stage with each score.
- Compare trends, not just single values.
- Combine Constant score with imaging and physical exam findings.
Important: This calculator is for educational and tracking use only. It does not replace diagnosis or treatment advice from a qualified clinician.