FRAX is a fracture risk assessment tool developed by the WHO Collaborating Centre for Metabolic Bone Diseases at the University of Sheffield. It calculates a 10-year probability of major osteoporotic fractures (hip, spine, shoulder, or forearm) and hip fracture alone, based on clinical risk factors.

Is this calculator a replacement for medical advice?

No. This tool is for educational and informational purposes only. Results should be discussed with a qualified healthcare provider who can order bone density testing and recommend treatment if needed.

Why does age matter so much?

Fracture risk increases substantially with age. After 65, bone loss accelerates, balance declines, and recovery from falls worsens, all of which raise both the probability and severity of fractures.

What counts as a prior fracture?

A fracture in adult life that occurred spontaneously or as a result of trauma that would not cause fracture in a healthy person (fragility fracture). Common examples include wrist, spine, hip, and shoulder fractures after minor falls.

What is a major osteoporotic fracture?

Major osteoporotic fractures include fractures of the spine (vertebral), hip, forearm (wrist/radius), and shoulder (proximal humerus). These are the four fracture sites most associated with osteoporosis.

When should I consider bone density testing (DXA)?

Many guidelines recommend DXA testing if your 10-year major fracture probability exceeds 10–15%, or your hip fracture risk exceeds 3%. However, thresholds vary by country and guideline — consult your doctor.

FRAX Fracture Risk Calculator

Name: FRAX Fracture Risk Calculator
Availability: InStock
Author: Nham Vu

Enter age, sex, BMI, and clinical risk factors to estimate your 10-year probability of major osteoporotic and hip fracture.

Patient Information

Age (years)

Biological Sex

Female Male

Height (cm)

Weight (kg)

Clinical Risk Factors

Previous fragility fracture Parent had hip fracture Current smoker Glucocorticoid (steroid) use Rheumatoid arthritis Alcohol 3+ units/day Secondary osteoporosis cause

Fill in the form and click Calculate Risk

Summary

Enter age, sex, BMI, and clinical risk factors to estimate your 10-year probability of major osteoporotic and hip fracture.

How it works

Enter your age (40–90) and select your biological sex.
Input your height and weight so BMI can be calculated automatically.
Select any applicable clinical risk factors (prior fracture, parental hip fracture, smoking, steroids, rheumatoid arthritis, alcohol use).
Choose whether you have a secondary cause of osteoporosis.
Click "Calculate Risk" to see estimated 10-year fracture probabilities.
Review the risk category and discuss results with your healthcare provider.

Use cases

Screen patients aged 40+ for osteoporosis treatment need.
Educate patients about fracture risk before DXA bone density testing.
Compare risk levels before and after lifestyle changes.
Support clinical decisions about starting bisphosphonate therapy.
Understand how individual risk factors contribute to overall fracture probability.
Evaluate risk for postmenopausal women or older men.

Frequently Asked Questions

Last updated: 2026-06-09 · Reviewed by Nham Vu