How to use this leg alignment gap tracker
Two measurements are easy to repeat at home: the gap between your knees when you stand with your feet together, and the gap between your ankles when you stand with your knees together. Enter the latest and previous readings plus the days between them, and you get each gap's change and a weekly figure. Leave the two previous boxes blank and the page simply records the latest values.
Bow legs usually refers to a shape with a gap between the knees, and knock knees to one where the knees meet and the ankles stay apart. This page does not decide which, if either, applies, and includes no normal gap: no authoritative standard for reading a home-measured gap as an alignment state is published (reviewed October 2026).
Because both readings are gaps between the two sides, left-right asymmetry cannot be derived from them and that calculation is not supported. Keep foot position and weight distribution the same, since the value drifts easily, and compare repeat readings taken the same way. This page is not a medical assessment. If a knee hurts, your gait has changed, or a child's leg shape is changing on one side only, see an orthopaedic clinician.
Frequently Asked Questions
This page gives no threshold. No authoritative standard for reading a home-measured gap as an alignment state is published, so only your values and their change are calculated.
No. Both readings are gaps between the two sides, so neither produces a value for one leg alone. Left-right comparison is not supported.
Yes. Leave the two previous boxes blank and the latest values are recorded, with a note that the change and weekly figures were not calculated.