Blood Pressure Chart
Blood Pressure Chart — Instant checker with a full reference table
| Category | Systolic (mmHg) | Diastolic (mmHg) | |
|---|---|---|---|
Low |
Below 90 | or | Below 60 |
Normal |
Below 120 | and | Below 80 |
Elevated |
120 – 129 | and | Below 80 |
High (Stage 1) |
130 – 139 | or | 80 – 89 |
High (Stage 2) |
140 and above | or | 90 and above |
Hypertensive Crisis |
Above 180 | and/or | Above 120 |
Introduction:
Blood pressure is one of the most frequently checked health metrics in the world — and for good reason. It’s a simple, painless measurement that tells you how hard your heart is working to pump blood through your arteries, and it’s one of the earliest warning signs of cardiovascular risk.
A blood pressure reading is written as two numbers, like 120/80. The first number (systolic) measures the pressure in your arteries when your heart beats. The second number (diastolic) measures the pressure when your heart rests between beats. Together, these two numbers tell doctors a lot about your cardiovascular health — but only if you know how to read them correctly.
The MyHealthChart Blood Pressure Chart combines an instant checker with a full reference table, using the same American Heart Association (AHA) guidelines your doctor uses — so you can see exactly where your reading falls and what it means, in seconds.
The Method Behind the Categories:
The tool compares your two numbers against AHA-published thresholds. Because systolic and diastolic pressure are evaluated independently, your category is always determined by whichever number is higher on the scale — even if only one of the two numbers is elevated.
| Category | Systolic (mmHg) | Diastolic (mmHg) | |
|---|---|---|---|
| Low | Below 90 | or | Below 60 |
| Normal | Below 120 | and | Below 80 |
| Elevated | 120 – 129 | and | Below 80 |
| High Blood Pressure (Stage 1) | 130 – 139 | or | 80 – 89 |
| High Blood Pressure (Stage 2) | 140 and above | or | 90 and above |
| Hypertensive Crisis | Above 180 | and/or | Above 120 |
For example, a reading of 132/78 falls into Stage 1 High Blood Pressure — even though the diastolic number (78) is in the normal range — because the systolic number (132) is high enough on its own to determine the category.
Tips for Getting an Accurate Reading:
- Sit quietly for 5 minutes before measuring. Activity, stress, or rushing into a reading can temporarily raise your numbers.
- Keep your feet flat on the floor and your back supported — don’t cross your legs while measuring.
- Support your arm at heart level, resting on a table or armrest, rather than letting it hang down.
- Avoid caffeine, exercise, and smoking for at least 30 minutes before checking, as all three can temporarily elevate blood pressure.
- Take two or three readings, a minute apart, and use the average — a single reading can be affected by momentary stress or “white coat syndrome” (anxiety from being measured, especially in a clinical setting).
- Measure at the same time each day if you’re tracking trends, since blood pressure naturally fluctuates throughout the day.
- Use a validated home monitor with a properly sized cuff — a cuff that’s too small or too large can distort your reading significantly.
Reading Your Results & Chart Guide:
After checking your reading, you’ll see a colour-coded badge along with the matching row highlighted in the reference chart below:
🔵 Low Blood Pressure
Readings below 90/60 may cause dizziness, fatigue, or fainting in some people, though many people naturally run low without symptoms. If you experience symptoms alongside a low reading, it’s worth discussing with a doctor.
🟢 Normal
Readings below 120/80 represent the healthiest range, associated with the lowest long-term cardiovascular risk. Maintaining this range through diet, activity, and stress management supports long-term heart and kidney health.
🟡 Elevated
A systolic reading of 120–129 with a normal diastolic number is considered an early warning sign. This stage often responds well to lifestyle changes alone — without needing medication — if addressed early.
🟠 High Blood Pressure (Stage 1)
This range typically prompts a doctor to recommend lifestyle changes, and sometimes medication, depending on your overall cardiovascular risk factors like age, weight, and family history.
🔴 High Blood Pressure (Stage 2)
This range usually requires both lifestyle changes and medication, as the risk of complications like heart attack, stroke, and kidney damage increases significantly at this level.
⚫ Hypertensive Crisis
A reading above 180/120 is a medical emergency, regardless of how you feel. Seek immediate medical attention — this level of blood pressure can cause organ damage if not addressed urgently.
Important Limitations to Keep in Mind:
This tool is a screening aid, not a diagnostic device. Blood pressure naturally fluctuates throughout the day based on activity, stress, hydration, temperature, and even the time since your last meal or cup of coffee. A single high or low reading doesn’t automatically confirm a diagnosis of hypertension or hypotension.
Doctors typically diagnose high blood pressure based on the average of multiple readings taken on separate occasions, sometimes using 24-hour ambulatory monitoring for a complete picture. If your reading consistently falls outside the normal range — or if you experience symptoms like chest pain, severe headache, vision changes, or shortness of breath alongside a high reading — seek medical attention promptly.
Frequently Asked Questions:
Blood Pressure Chart FAQs
1. What is considered normal blood pressure on My Health Chart?
According to MyHealthChart‘s Blood Pressure Chart, a normal reading is below 120/80 mmHg — meaning your systolic number is below 120 and your diastolic number is below 80. This range is based on American Heart Association guidelines and is associated with the lowest long-term cardiovascular risk.
2. How does the My Health Chart Blood Pressure Chart decide my category?
My Health Chart determines your category based on whichever number — systolic or diastolic — falls into the higher risk range. For example, if your systolic reading is high but your diastolic reading is normal, My Health Chart will still place you in the higher category, since either number on its own can indicate elevated risk.
3. Can one high reading on My Health Chart mean I have hypertension?
No. My Health Chart’s Blood Pressure Chart is a screening tool, not a diagnostic device. A single high reading can be caused by stress, recent activity, caffeine, or anxiety from being measured. Doctors typically diagnose hypertension based on the average of multiple readings taken on separate occasions, not a single number.
4. What should I do if My Health Chart shows a Hypertensive Crisis result?
If My Health Chart shows a reading above 180/120, this is flagged as a medical emergency. You should seek immediate medical attention rather than waiting to see if the reading improves on its own, as this level of blood pressure can cause organ damage if left untreated.
5. Why does MyHealthChart highlight a row in the reference chart after I check my reading?
MyHealthChart automatically highlights the matching row in the reference table so you can instantly see how your personal result compares to every other blood pressure category, without having to manually search through the chart yourself.
6. Does MyHealthChart account for low blood pressure as well as high?
Yes. The MyHealthChart Blood Pressure Chart includes a Low Blood Pressure category for readings below 90/60 mmHg, in addition to Normal, Elevated, and the two stages of High Blood Pressure, giving you a complete picture rather than only flagging high readings.
7. Is my data saved when I use the MyHealthChart Blood Pressure Chart?
No. My Health Chart calculates your category instantly in your browser and does not store, save, or share any of the numbers you enter. You can use the MyHealthChart Blood Pressure Chart as many times as you like with no sign-up required.
8. How often should I check my blood pressure using MyHealthChart?
If you’re monitoring your blood pressure regularly, checking once a day at a consistent time using My HealthChart is generally sufficient for spotting trends. If you’ve received a Stage 1, Stage 2, or Hypertensive Crisis result, MyHealthChart recommends following up with a doctor, who may suggest more frequent monitoring.