Blood pressure
Blood pressure chart explained
Blood pressure chart searches are huge, but the useful answer is not a single perfect number. It is knowing what systolic and diastolic readings mean, when to recheck, and when a reading is urgent.
Start with the two numbers
A blood pressure reading is written as systolic over diastolic. The top number reflects pressure when the heart beats. The bottom number reflects pressure when the heart rests between beats. People often search for a chart because they want a quick label, but a safer habit is to write down the reading, time, cuff location, symptoms and whether the reading was repeated after a few quiet minutes.
- Use the same arm and cuff size when possible.
- Avoid interpreting one unusual reading without repeating it as instructed.
- Bring repeated high or low readings to a clinician who knows your medical history.
The common adult categories
The American Heart Association chart lists normal blood pressure as below 120 systolic and below 80 diastolic, elevated as 120-129 systolic and below 80 diastolic, stage 1 hypertension as 130-139 or 80-89, and stage 2 hypertension as 140 or higher or 90 or higher. Severe readings require special caution, especially if symptoms are present.
- Normal: below 120 and below 80.
- Elevated: 120-129 and below 80.
- Stage 1 or stage 2 hypertension: repeated readings in higher ranges need clinical follow-up.
What a chart cannot decide for you
CDC notes that high blood pressure is common and increases risk for heart disease and stroke, but diagnosis and treatment decisions are not made from a blog chart alone. Age, pregnancy, diabetes, kidney disease, medications, symptoms and home-monitoring technique can change what your next step should be. Use the chart as a conversation starter, not a self-treatment plan.
- Ask your clinician how often to measure if you are starting weight-loss treatment.
- Do not stop, start or change blood-pressure medication based on an online chart.
- Seek urgent help for severe readings with concerning symptoms such as chest pain, shortness of breath, weakness or confusion.
Educational content only. This post is not medical advice, diagnosis, treatment guidance or a substitute for a licensed clinician.
Video companion
Blood pressure chart in 45 seconds
Here is what the top and bottom numbers mean, and what a chart cannot decide for you.
- Systolic
- Diastolic
- AHA categories
- When to call