Understanding Blood Pressure Readings and Hypertension Charts
Learn about blood pressure categories, what the numbers mean, and how to interpret hypertensive charts. This guide helps you understand the risks of high blood pressure and the importance of monitoring your readings to prevent serious health issues.

Guide to Blood Pressure Readings and Classification Charts
Hypertension, commonly called high blood pressure, is a condition where blood moves through arteries at increased pressure over time. It can result from poor lifestyle habits, genetics, kidney issues, or hormonal imbalances. Persistent hypertension raises the risk of heart disease, stroke, kidney damage, and cognitive decline.
Deciphering Blood Pressure Numbers
Blood pressure is expressed as two figures, for example, 125/75 mm Hg. The systolic (upper number) measures pressure during heartbeats, while the diastolic (lower number) indicates pressure when the heart rests between beats.

Blood Pressure Classifications
- Normal – Readings below 120/80 mm Hg are deemed normal. Maintaining a healthy weight, balanced diet, and regular exercise is advised.
- Elevated – When systolic ranges from 120 to 129 mm Hg with diastolic below 80 mm Hg, it’s classified as elevated blood pressure.
Nearly half of adults over 20 have high blood pressure, many unaware of their condition. If untreated, it can cause severe health complications, including heart attacks and strokes.