How to use this wall test gap tracker
Standing with your back and hips against a wall and measuring the distance from the wall to the back of your head is easy to repeat under the same conditions at home. Enter the spacing between measurements and the gap for each round, and you get the latest value, the change from the first measurement, that change converted to a weekly figure, and the average of the values used. There are six boxes; blanks are excluded and the screen names which boxes were skipped.
The maths is subtraction and division. The change is the last value minus the first, and the weekly figure divides that by the elapsed days and scales to seven. No reference gap or normal range is included: no authoritative standard for reading a wall gap as a posture state is published, and height, shoulder depth and head shape move the number for the same person (reviewed October 2026).
This page is not a medical assessment. It does not judge a state or severity, predict how long correction takes, or prescribe exercises. Unless your shoes, head position and breathing are the same each time, the value easily drifts by around an inch. If your neck or shoulder hurts, or an arm feels numb or weak, see a clinician regardless of what the numbers show.
Frequently Asked Questions
This page gives no threshold. No authoritative standard for reading a wall gap as a posture state is published, so only your measurements and their change are calculated.
No. Blanks are dropped and only the filled values are used. Elapsed days come from the round number, so skipping a round keeps the spacing correct.
Identical values give a change of zero. Small differences in how you stand move the number, so if you have pain or numbness, see a clinician regardless of the figure.