Category Systolic (top number) Diastolic (bottom number) Normal Less than 120 mm Hg Less than 80 mm hg Prehypertension 120–139 80–89 Stage 1 hypertension 140–159 90–99 Stage 2 hypertension 160 or higher 100 or higher There is an exception to the above definition of high blood pressure. A blood pressure of 130/80 mmHg or higher…