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FRAX Fracture Risk Calculator

Estimate your 10-year probability of a major osteoporotic and hip fracture from age, sex, BMI, clinical risk factors, and an optional T-score.

FRAX Fracture Risk Calculator

FRAX is defined for ages 40 to 90.

Body mass index: enter weight and height

Clinical risk factors
Bone density (optional)

Without a T-score, body mass index is used as a rough proxy for bone strength, so the estimate is less precise.

Enter age, sex, weight, and height (ages 40 to 90) to estimate your 10-year fracture probability.

Medical disclaimer

This is a simplified educational estimate, not the official FRAX tool and not medical advice. The real FRAX algorithm uses country-specific, unpublished coefficients; this calculator combines published baseline probabilities with published relative risks, so the result will differ from an official FRAX score. It cannot diagnose osteoporosis or decide treatment. For an actual fracture-risk assessment, see a clinician and use the validated FRAX tool with a DXA bone density scan.

Frequently Asked Questions about the FRAX Fracture Risk Calculator

What does the FRAX fracture risk calculator estimate?
It produces an unofficial 10-year estimate for major osteoporotic fracture and hip fracture from age, sex, BMI, and selected risk factors. A femoral-neck T-score changes the simplified result but does not turn it into an official FRAX calculation.
How is the 10-year risk calculated here?
This tool starts from published baseline 10-year fracture probabilities for each age and sex (from the FRAX UK reference cohort), then multiplies that baseline by a published relative risk for each clinical risk factor you check. When you supply a T-score, it applies the bone density gradient of risk, about 1.5 per standard deviation for major fractures and 2.6 per standard deviation for hip fractures. Without a T-score, your BMI is used as a rough stand-in for bone strength.
Why does my result differ from the official FRAX tool?
This is an unofficial simplified model that multiplies published baseline values and relative risks. It can differ materially from the validated country-specific FRAX calculation, especially when several risk factors interact. Do not interpret numerical proximity as guaranteed; use the official tool with a clinician for an assessment.
What is a major osteoporotic fracture versus a hip fracture?
A major osteoporotic fracture means a clinical fracture of the hip, spine, forearm, or upper arm, the sites most linked to fragility. A hip fracture is one specific and serious type of major osteoporotic fracture, so the calculator reports it separately. The hip number is always equal to or lower than the major osteoporotic number, since hip fractures are a subset of that group.
What counts as high risk, and what should I do about it?
Do not apply treatment thresholds to this unofficial simplified result. Clinical thresholds depend on a validated country-specific assessment, bone density, fracture history, guidelines, and individual risks. Review an official FRAX result with a clinician before making a screening or treatment decision.
Is this a substitute for medical advice?
No. This calculator is for education and general orientation only and is not a diagnosis or a treatment plan. It cannot tell you whether you have osteoporosis or whether you need medication. Talk to a qualified clinician and use the validated FRAX tool together with a DXA bone density scan for any real decision about your bone health.

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