Background: Postoperative hypoparathyroidism manifesting as hypocalcaemia is still one of the most common complications seen in patients undergoing total thyroidectomy, despite every effort by the surgeon to preserve the parathyroid glands during surgery. Incidence varies from 0.5 to 65%(1). In the present study, we aimed to evaluate the role of serum Parathormone level as a reliable indicator of hypocalcaemia following total thyroidectomy. Material and Methods: Present study was a cross-sectional, observational study conducted in all the patients undergoing Total thyroidectomy at a tertiary hospital.