How the shoulder angle comparison works
How far a shoulder lifts is hard to read from one side alone; you need something to compare it with. This page takes both of today angles and reports the gap between them, and if you add your previous angles it reports the change on each side and, with the weeks elapsed, the average change per week.
The arithmetic is subtraction and division only. The gap is the absolute difference between left and right, with a note saying which side is higher, and when the difference is zero the page says the sides are equal. Previous angles have to be entered for both sides for the comparison to stand, so entering one side alone brings up a message instead.
This page offers no table of normal range of motion and makes no finding that movement is restricted. Those thresholds are not confirmed in an authoritative source, and no score or grade is produced. An angle measured at home without a goniometer shifts easily with elbow position and trunk lean, so use it only to compare your own measurements taken the same way. Current as of October 2026, and not a medical diagnosis. Worsening shoulder pain, pain that wakes you at night, or lasting difficulty lifting the arm should be seen by a clinician.
Frequently Asked Questions
This page does not name that threshold. Range-of-motion cut-offs shift with the measurement method and posture and are not confirmed in an authoritative source. An angle alone cannot sort out the cause, so get an examination.
Stand side-on to a wall, raise the arm slowly and photograph the highest point, or use the angle tool on a phone. What matters is measuring the same way every time. If the method changes, a change in the number may be the method rather than the shoulder.
This page does not say fine or not fine. No threshold for how many degrees of difference matters is confirmed in an authoritative source. If the gap is widening, use that trend as something to describe at an appointment.