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Blood Pressure Checker

Check blood pressure readings against AHA guidelines.

Upper number

Lower number

Blood pressure categories (AHA guidelines)
CategorySystolicand/orDiastolic
Low (Hypotension)< 90and/or< 60
Normal< 120and/or< 80
Elevated120–129and/or< 80
High Stage 1130–139and/or80–89
High Stage 2≥ 140and/or≥ 90
Hypertensive Crisis> 180and/or> 120

ℹ️ This tool is for informational purposes only. Always consult a healthcare provider for diagnosis and treatment of blood pressure conditions.

Understanding your blood pressure numbers

Blood pressure is expressed as two numbers: systolic over diastolic (e.g., 120/80 mmHg). Regular monitoring helps you and your doctor track trends and catch hypertension early — before it leads to heart disease or stroke.

AHA blood pressure categories

The American Heart Association defines six categories: Low (Hypotension), Normal, Elevated, High Stage 1, High Stage 2, and Hypertensive Crisis. This tool instantly classifies your reading and highlights any cause for concern.

Frequently asked questions

What is a normal blood pressure reading?
According to the American Heart Association (AHA), a normal blood pressure is less than 120/80 mmHg. Readings between 120–129 systolic (with diastolic below 80) are considered Elevated.
What is systolic vs diastolic pressure?
Systolic pressure (the top number) measures the force when your heart beats. Diastolic pressure (the bottom number) measures the pressure between beats when your heart is resting.
When is blood pressure considered a hypertensive crisis?
A hypertensive crisis is when systolic pressure exceeds 180 mmHg or diastolic exceeds 120 mmHg. This requires immediate medical attention.
How does the reading log work?
Click 'Save to log' after entering a reading to add it to your session log. The log shows up to 20 recent readings along with the average systolic/diastolic values.
Is this tool a medical device?
No. This tool is for informational and educational purposes only. Always use a calibrated sphygmomanometer for clinical measurements, and consult a healthcare provider for diagnosis or treatment.

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