Work out bone density t score instantly with clear inputs, formula shown and shareable results.
Expresses measured bone mineral density as standard deviations from the young adult reference mean, the WHO definition of the T-score.
T-score
T-score = (measured BMD - young adult mean BMD) / reference standard deviation; osteoporosis at -2.5 or below
Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
The Z-score compares with age-matched peers and is preferred in children, premenopausal women and men under 50.
Lumbar spine, femoral neck or total hip; the lowest of the valid sites determines the diagnosis.