Normal ranges for blood pressure in adult humans are:
- Systolic: 120 mmHg (Top number)
- Diastolic: 80 mmHg (Bottom number)
For children, it will be lower due to the elasticity of arteries.
The problem with blood pressure readings is that the ranges for both systolic and diastolic pressures are so varied that there is no true range for diagnostic comparability. Hypertension therefore is only diagnosed if secondary signs of high blood pressure are present, along with a prolonged high systolic pressure reading over several visits.1