Blood Pressure Calculator — Normal vs High BP Ranges
Check your blood pressure reading against medical guidelines. Understand what your systolic and diastolic numbers mean and when to see a doctor.
Blood pressure is measured as two numbers: systolic (pressure when heart beats) over diastolic (pressure between beats). Normal blood pressure is below 120/80 mmHg. Elevated is 120-129 systolic with diastolic below 80. Stage 1 hypertension is 130-139 systolic or 80-89 diastolic. Stage 2 is 140+ systolic or 90+ diastolic. Hypertensive crisis requiring immediate medical attention is above 180/120.
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Key Information
| Parameter | Details |
|---|---|
| Normal BP | Below 120/80 mmHg |
| Elevated | 120-129 / below 80 |
| Stage 1 Hypertension | 130-139 / 80-89 |
| Stage 2 Hypertension | 140+ / 90+ |
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Use Calculator NowFrequently Asked Questions
What is a good blood pressure reading?
A healthy blood pressure is below 120/80 mmHg. Optimal is around 110/70. If your reading consistently shows 120-129 systolic you have elevated blood pressure and should make lifestyle changes. Regular monitoring is important because high blood pressure usually has no symptoms until serious damage has occurred.
Does blood pressure change during the day?
Yes blood pressure naturally fluctuates throughout the day. It is typically lowest during sleep and rises upon waking. Stress exercise caffeine and meals can temporarily raise it. For accurate monitoring measure at the same time daily while sitting quietly for 5 minutes. Take 2-3 readings one minute apart and average them.
How to lower blood pressure naturally?
Reduce sodium intake to under 2300mg daily (ideally 1500mg). Exercise 150 minutes per week of moderate activity. Maintain a healthy weight as losing even 5 kg can significantly reduce BP. Limit alcohol to 1-2 drinks daily. Follow the DASH diet rich in fruits vegetables and whole grains. Manage stress through meditation or deep breathing. These changes can reduce systolic BP by 5-20 points.
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Last updated: March 2026