Blood pressure calculator

General wellness information, not medical advice. Results are estimates based on published formulas and ranges; they are not a diagnosis. Read more.

How to use the blood pressure calculator

1. Measure correctly first. Sit quietly for five minutes, back supported, feet flat, arm at heart level, cuff on bare upper arm. No caffeine or exercise for 30 minutes.
2. Enter systolic and diastolic. The top and bottom numbers from the cuff display, in mmHg.
3. Read the category. Categories follow the 2017 ACC/AHA guideline. Your category is set by whichever number is higher.
4. Note pulse pressure and MAP. Pulse pressure above about 60 mmHg in older adults, or MAP outside 70 to 100, are worth mentioning to a clinician.

What the categories mean

Normal is below 120/80. Elevated is 120 to 129 with diastolic below 80. Stage 1 hypertension is 130 to 139 or 80 to 89. Stage 2 is 140 or higher, or 90 or higher. A reading above 180/120 is a hypertensive crisis. One reading never makes a diagnosis; clinicians average several readings over days.

Pulse pressure and MAP, briefly

Pulse pressure is systolic minus diastolic. Around 40 mmHg is typical; a widening gap with age reflects stiffer arteries. Mean arterial pressure approximates the average pressure during one heartbeat and is calculated as diastolic plus one third of pulse pressure. Clinicians consider roughly 70 to 100 mmHg normal.

Logging beats calculating

A single calculation tells you where one reading sits. The pattern across mornings and evenings over weeks is what your doctor actually wants. Pulse Tracker logs each cuff reading with its category and charts the trend, and it can show a clearly labeled estimate between cuff readings after calibration.

Wellness disclaimer. Pulse Tracker is intended for general wellness use only. It is not a medical device, is not FDA cleared or approved, and is not intended to diagnose, treat, cure or prevent any disease or condition. Blood pressure shown in the app is either a value you entered from your own cuff or an estimate derived from the pulse signal after cuff calibration; it is not a measurement and must not be used to make medical decisions. Read the full wellness disclaimer. Camera readings, estimates and classifications are for general information only and can be affected by movement, lighting, skin temperature and other factors. Do not use them to diagnose, treat or make decisions about a medical condition. Always consult a qualified healthcare professional, and call emergency services if you have chest pain, shortness of breath, fainting or other urgent symptoms.