What is the approximate ratio of systolic to diastolic blood pressure in normal range?

In a healthy adult, the normal blood pressure range is typically considered to be between 90/60 mmHg and 120/80 mmHg. This means that the systolic blood pressure (the pressure when the heart beats) should be between 90 and 120 mmHg, while the diastolic blood pressure (the pressure when the heart rests between beats) should be between 60 and 80 mmHg.

Therefore, the approximate ratio of systolic to diastolic blood pressure in a normal range is around 3:2 or 1.5.