Health

Blood Pressure Calculator

Interpret your blood pressure by guideline, calculate MAP and pulse pressure, average multiple readings, and identify common red-flag patterns.

BP Category MAP & Pulse Home Average Risk Flags

Blood Pressure Category, MAP, Pulse Pressure & Average Estimator

Use guideline-based categories, compute MAP and pulse pressure, and average home readings to get a clearer picture than a single measurement.

This tool helps you interpret numbers and averages. It does not diagnose disease. If your readings are consistently high or you have concerning symptoms, seek medical advice.
MAP here uses a common estimate: DBP + 1/3(SBP − DBP). Pulse pressure is SBP − DBP. These are supportive metrics, not a replacement for clinical assessment.
Averages are more meaningful than single readings. If your home average is consistently above guideline thresholds, consider discussing it with a clinician, especially if you have other risk factors.
This tab highlights patterns that commonly deserve attention, but it cannot account for your full medical situation. If you feel unwell, follow local emergency guidance.

How to interpret a blood-pressure calculation cautiously

Blood-pressure readings are expressed in millimetres of mercury (mmHg), with systolic pressure recorded before diastolic pressure. If you enter a reading such as 120/80, the two values represent different phases of the heart’s pumping cycle; they are not interchangeable. Some calculators additionally show pulse pressure, which is systolic minus diastolic, or mean arterial pressure, which can be approximated from the same values under certain conditions.

A single home measurement does not establish a diagnosis. Reading conditions matter: cuff size, body position, recent activity, speaking during measurement, and device calibration can all affect the result. Taking repeat measurements with a validated monitor and recording the circumstances is generally more informative than acting on one calculated value.

Health interpretation depends on age, medical history, pregnancy status, treatment, symptoms, and clinical guidance. If a measurement is very high or accompanied by chest pain, severe headache, weakness, breathing difficulty, or confusion, seek urgent medical care rather than relying on an online category label. The calculator is informational and does not replace professional assessment.