Understanding the FRAX Score US Calculator
This calculator estimates ten year fracture risk for adults in the United States. It uses age, sex, body size, femoral neck bone data, and clinical risk flags. The tool is for education. It does not replace the official FRAX service or medical care.
Why fracture risk matters
Osteoporosis can stay silent until a fracture occurs. A simple risk review helps patients prepare better questions for a visit. It also helps clinicians decide when bone density results need closer attention. Hip fractures carry major recovery burdens. Major osteoporotic fractures include hip, clinical spine, forearm, and shoulder sites.
Formula used
This page uses a transparent proxy model. It starts with an age and sex baseline. The baseline is adjusted by BMI, ethnicity, prior fracture, parent hip fracture, smoking, steroid exposure, rheumatoid arthritis, secondary osteoporosis, alcohol intake, femoral neck T-score, and recent falls. BMD can be converted to an approximate T-score by comparing it with a reference mean. The final risk is capped to keep results within practical percentage limits. Because the official method uses country calibrated hazards and mortality data, this estimate should be checked with the official tool.
How to use this calculator
Enter age between forty and ninety years. Choose sex and a U.S. reference group. Enter height and weight in your preferred unit system. Add femoral neck BMD or T-score when available. Then check each risk factor that applies. Press calculate. Read the hip fracture result, the major fracture result, and the interpretation note. Use the CSV or PDF button to save a simple record.
Reading the result
A low estimate does not mean no risk. A high estimate does not confirm osteoporosis. The result is a screening discussion aid. Many U.S. guidelines use hip risk of three percent, or major fracture risk of twenty percent, as common treatment discussion thresholds for people with osteopenia. A prior hip or spine fracture, or a T-score at or below minus two point five, may also support urgent clinical review.
Helpful next steps
Bring the report to a clinician. Confirm medications and medical history. Ask about calcium, vitamin D, exercise, fall prevention, and bone density testing. Review results whenever health status changes or new fractures occur.