Danis-Weber Ankle Classification
Danis-Weber ankle classification (A/B/C) of a distal-fibula fracture by its level relative to the syndesmosis; higher fracture, higher type.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Fracture level relative to the syndesmosis
- Above the syndesmosis — suprasyndesmotic (C)
Result: Danis-Weber Type C — suprasyndesmotic (above the syndesmosis); syndesmosis disrupted, an unstable injury usually needing fixation.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Type
- set solely by the distal-fibula fracture level vs the syndesmosis: A below (infrasyndesmotic), B at the level (transsyndesmotic), C above (suprasyndesmotic).
- Stability
- A intact/stable; B variable — assess the medial side / stress films before declaring stability; C disrupted/unstable, usually ORIF with syndesmotic fixation.
What you enter
- Fracture level relative to the syndesmosis
How this is calculated
Weber BG. Die Verletzungen des oberen Sprunggelenkes. Bern: Hans Huber; 1972 (Danis-Weber classification; pathologic-anatomic basis Danis 1949; adopted by the AO Foundation as 44-A/B/C). Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.