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Ottawa Ankle Rules Fracture Risk Calculator

X-ray needed? Ottawa rules for ankle injury.

Applies the Ottawa Ankle Rules to determine if an X-ray is needed after ankle injury: pain in malleolar zone + bone tenderness at posterior fibula/tibia tip or inability to weight-bear.

Marcus Laurent By Marcus Laurent
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Any positive criterion → X-ray indicated; all negative → clinically clear.

In depth

Applies the Ottawa Ankle Rules to determine if an X-ray is needed after ankle injury: pain in malleolar zone + bone tenderness at posterior fibula/tibia tip or inability to weight-bear.