FRAX Fracture Risk Calculator
Estimate the 10-year probability of a major osteoporotic fracture using key skeletal risk factors.
Input Parameters
Enter details for calculation.
Major Fracture Risk
Expert Tip
FRAX guides treatment choices: a 10-year major osteoporotic risk ≥ 20% or hip fracture risk ≥ 3% warrants pharmacotherapy.
Calculation Methodology & Details
Formula
Integrates clinical risk factors (prior fracture, smoking, glucocorticoids) and bone density.
Important Disclaimer
The calculations provided are for educational and general informational purposes only. They do not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider.
How FRAX is Scored
Follow these steps to use this calculator:
Input Age & Bone Density
T-score is obtained from a DEXA bone scan.
Select Clinical Risks
Identify history of fractures or family indicators.
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ℹ️ About this Calculation
This orthopaedics and musculoskeletal clinical calculator evaluates joint replacement outcomes, osteoporotic fracture risk, spinal deformity severity, and physical mobility benchmarks based on AAOS clinical protocols.
Variable Glossary
Biomechanical Data
DXA T-score, Cobb angle degrees, gait velocity (m/s), dynamometer grip strength (kg), or functional survey items.
Functional Index
10-year major osteoporotic fracture probability (FRAX %), Oxford joint score (0-48), or spinal curvature classification.
How to Calculate Step-by-Step
Step 1
Input patient bone density BMD values, spinal radiograph degrees, or physical test performance numbers.
Step 2
Select patient age, gender, and secondary clinical risk factors (prior fracture history, steroid use).
Step 3
Review calculated joint function impairment tiers, sarcopenia risk categories, or fracture intervention thresholds.