Frax Calculator

As we age, maintaining bone health becomes increasingly important. Osteoporotic fractures can severely impact quality of life, and early risk detection is key to prevention. That’s where our FRAX Calculator comes in.

This tool helps users assess their 10-year probability of a major osteoporotic fracture, including hip, spine, forearm, and shoulder fractures. Based on the World Health Organization’s FRAX® model, our online version simplifies the risk estimation using readily available personal and lifestyle information.

In this article, you’ll learn exactly how to use the calculator, view examples of common risk scenarios, and find answers to frequently asked questions related to FRAX and osteoporosis risk.

What Is the FRAX Calculator?

The FRAX (Fracture Risk Assessment Tool) is a clinical algorithm developed by the University of Sheffield with backing from the WHO. It estimates the 10-year risk of bone fractures based on key risk factors—without needing a bone mineral density (BMD) test.

Healthcare professionals use FRAX worldwide to guide decisions about further diagnostic testing or preventive treatment.

Our online FRAX Calculator simplifies this process and allows you to get a quick, reasonably accurate estimate of your fracture risk in just a few clicks.

How to Use the FRAX Calculator: Step-by-Step Guide

Follow these steps to estimate your fracture risk using the tool:

  1. Enter your Age
    Input your current age (between 40–90 years old). Age is one of the strongest predictors of fracture risk.
  2. Select your Gender
    Choose either “Male” or “Female”. Women, especially postmenopausal, are at higher risk.
  3. Enter your BMI
    Enter your Body Mass Index (BMI) to one decimal point. You can use a BMI calculator beforehand if needed.
  4. Answer Yes/No to the Following Risk Factors:
    • Previous Fracture: Have you broken a bone since age 50?
    • Parent Hip Fracture: Has a parent suffered a hip fracture?
    • Smoking Status: Are you a current smoker?
    • Steroid Use: Are you using oral glucocorticoids (e.g., prednisone)?
    • Rheumatoid Arthritis (RA): Have you been diagnosed with RA?
    • Secondary Osteoporosis: Do you have a condition contributing to osteoporosis (e.g., type 1 diabetes, early menopause)?
    • Alcohol Intake: Do you consume 3 or more units of alcohol daily?
  5. Click “Calculate”
    The tool instantly provides your estimated 10-year fracture risk as a percentage.
  6. View and Interpret the Result
    A result of 10% or higher may warrant further testing or medical consultation, depending on clinical guidelines.

Practical Example

Example 1: Moderate Risk Scenario

  • Age: 68
  • Gender: Female
  • BMI: 20.5
  • Prior Fracture: Yes
  • Parent Fracture: No
  • Smoking: No
  • Steroid Use: Yes
  • RA: No
  • Secondary Osteoporosis: No
  • Alcohol: Yes

Calculation:

  • Base risk: 5%
  • Age ≥ 65: +3%
  • Prior fracture: +4%
  • Steroid use: +3%
  • Alcohol: +2%
  • Total: 17% estimated fracture risk

Interpretation: This user has a moderate-to-high risk and should speak with a healthcare provider.

Why Estimating Fracture Risk Matters

Fractures due to osteoporosis are not just painful—they’re life-altering. In older adults, hip fractures can lead to loss of mobility, independence, or even premature death. By understanding your risk early, you can:

  • Take preventive measures (like exercise or supplements)
  • Modify lifestyle choices (e.g., stop smoking, reduce alcohol)
  • Discuss medication options with your doctor
  • Decide whether you need bone density testing

Frequently Asked Questions (FAQs)

1. What is considered a high FRAX score?

A 10-year risk of 20% or more is typically considered high for major osteoporotic fractures.

2. Do I need a bone density (BMD) scan for this calculator to work?

No. This version of the FRAX calculator estimates risk without a BMD input.

3. What if I’m under 40 or over 90?

The FRAX model is validated for individuals aged 40–90. Results outside this range may not be accurate.

4. Can men use this calculator?

Yes. FRAX includes gender-specific risk models for both males and females.

5. What if I’ve had more than one fracture?

This calculator only considers whether you’ve had at least one prior fracture. Multiple fractures may indicate even higher risk.

6. How is BMI used in the calculation?

Lower BMI (especially under 19) increases risk due to lower bone and muscle mass.

7. Does the calculator factor in physical activity?

Not directly. However, physical activity can influence fracture risk and bone strength long-term.

8. What are glucocorticoids and why do they matter?

They are medications like prednisone, often used for inflammation. Long-term use weakens bones.

9. How often should I use this calculator?

Generally, once per year or after any major health changes (like a fracture, new medication, or menopause).

10. Is this calculator accurate without a BMD test?

It’s reasonably accurate but less precise than FRAX with BMD. Always consult your doctor for confirmation.

11. Should I worry if my score is below 10%?

Probably not urgently, but maintaining bone health is still essential. Talk to your doctor if you’re unsure.

12. Does rheumatoid arthritis increase fracture risk?

Yes. RA causes systemic inflammation and often requires medications that weaken bone.

13. What counts as ‘secondary osteoporosis’?

Conditions like type 1 diabetes, hyperthyroidism, early menopause, and chronic liver disease fall under this category.

14. Why is alcohol consumption included?

Excessive alcohol weakens bone structure and increases fall risk, both contributing to fractures.

15. How accurate is the FRAX tool overall?

It’s one of the most widely used and validated tools globally, especially for primary care screening.

16. Can I reduce my fracture risk if I’m high-risk?

Yes. Through lifestyle changes, medications, and exercise, many people lower their risk substantially.

17. Will the calculator suggest treatment?

No, it only provides a risk percentage. You’ll need to discuss results with a healthcare provider.

18. Does the calculator consider race or ethnicity?

This simplified version doesn’t, but some FRAX models do include ethnicity adjustments.

19. What happens after I get my result?

Use it as a conversation starter with your doctor to decide whether further tests or treatment are needed.

20. Is this calculator a substitute for a medical evaluation?

Absolutely not. It’s an educational tool, not a diagnostic device.

Final Thoughts

The FRAX Calculator on our website is a fast, accessible tool for estimating your 10-year fracture risk using essential lifestyle and health inputs. It empowers users with data-driven insights and supports proactive health choices.

If your result shows moderate or high risk, consult a healthcare provider for further assessment and possibly a bone density test. Preventing fractures starts with awareness—and this calculator is your first step.