How to use the Complete Guide to Blood Pressure
Blood Pressure (BP) is the force of circulating blood against the walls of your arteries. It is a vital indicator of cardiovascular health. High blood pressure (Hypertension) is often called the "Silent Killer" because it typically has no symptoms until significant damage is done.
Consistent home monitoring allows you to track your trends over time, which is far more valuable than a single snapshot at a doctor's office. This calculator helps you categorize your readings according to the latest AHA/ACC guidelines.
💓 Systolic vs Diastolic
Systolic (top number) measures pressure when the heart beats. Diastolic (bottom number) measures pressure between beats. Both are critical, but Systolic is given more attention as a major risk factor for cardiovascular disease in people over 50.
📉 The Silent Damage
Uncontrolled high BP can damage your arteries, making them less elastic. This decreases the flow of blood and oxygen to your heart and leads to heart disease. It can also cause stroke, kidney failure, and vision loss.
The Formula
BP Categories (AHA/ACC)
| Category | Systolic | Diastolic |
|---|---|---|
| Normal | < 120 | and < 80 |
| Elevated | 120-129 | and < 80 |
| Stage 1 | 130-139 | or 80-89 |
| Stage 2 | 140+ | or 90+ |
| Crisis | 180+ | or 120+ |
Frequently Asked Questions
What is 'White Coat Hypertension'?
This is when blood pressure readings are higher in a clinical setting due to anxiety but normal at home. Home monitoring is often recommended to verify results.
When is the best time to measure BP?
Measure at the same times each day, usually morning and evening. Avoid caffeine or exercise 30 minutes before, and rest for 5 minutes.
What does the bottom number mean?
The bottom number (Diastolic) measures pressure between heartbeats when the heart fills with blood. A high Diastolic indicates your arteries can't relax properly.