Blood Pressure Checker & Tracker
Check your blood pressure reading, see your classification, and log readings over time to track trends.
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📘 What is the Blood Pressure Checker & Tracker?
This calculator classifies a blood pressure reading using the standard categories (Normal, Elevated, Stage 1, Stage 2) and also calculates two values rarely shown on a home BP monitor: pulse pressure and mean arterial pressure, both of which carry additional clinical meaning beyond the headline systolic/diastolic numbers.
⚙️ How Blood Pressure is calculated
How the four categories are defined
Normal is below 120/80. Elevated is systolic 120–129 with diastolic still below 80. Stage 1 hypertension is systolic 130–139 or diastolic 80–89. Stage 2 is 140/90 or higher. Crossing either threshold (systolic or diastolic) is enough to move into the higher category.
Pulse pressure — the gap between the two numbers
Pulse pressure is simply systolic minus diastolic. A persistently wide pulse pressure (over roughly 60mmHg) can indicate reduced arterial flexibility, and is increasingly used as an additional risk indicator alongside the standard category.
Mean arterial pressure (MAP)
MAP estimates the average pressure in the arteries across a full cardiac cycle, weighted toward diastolic since the heart spends more time in that phase.
Mean arterial pressure
MAP = diastolic + (systolic − diastolic) ÷ 3
🧮 Worked examples
Example — Stage 1 reading
A reading of 135/85 mmHg.
→ Classified as Stage 1 hypertension. Pulse pressure = 50 mmHg, MAP ≈102 mmHg
Example — normal reading
A reading of 115/75 mmHg.
→ Classified as Normal. Pulse pressure = 40 mmHg, MAP ≈88 mmHg
💡 Original insights & how to use this calculator
Why a single reading is less useful than a tracked average
Blood pressure fluctuates throughout the day and reacts to stress, caffeine, and recent activity. Tracking multiple readings over days or weeks and averaging them gives a far more reliable picture than reacting to any single number.
Understanding why doctors care about the diastolic number too
Many people focus only on the systolic (top) number, but a normal systolic reading with an elevated diastolic number still indicates a real category shift.
When a single high reading warrants immediate attention
A reading above 180/120 mmHg is considered a hypertensive crisis and warrants prompt medical attention regardless of how you feel.
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💡 Expert tips
Measure at the same time daily — morning is most consistent.
Sit quietly for 5 minutes before measuring.
Avoid caffeine, exercise, and smoking 30 minutes before.
Take 3 readings, 1 minute apart, and average them.
📖 Learn more on WellFiLab
Visit ↗❓ Common questions
What is a normal blood pressure?
Below 120/80 mmHg is normal. 120–129/<80 is elevated. 130–139/80–89 is Stage 1 hypertension.
When is blood pressure an emergency?
Above 180/120 mmHg is a hypertensive crisis. Seek emergency care immediately.
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