Blood Pressure Calculator
See your blood pressure category from systolic and diastolic readings.
This calculator is informational only and does not replace medical evaluation.
Blood pressure calculator
Enter systolic and diastolic readings. Pulse is optional.
Top number. Pressure during heartbeats. 60–300 mmHg.
Bottom number. Pressure between beats. 40–200 mmHg.
Resting heartbeats per minute. 30–220 bpm.
Pulse
72 bpm
120/80 mmHg: Stage 1 hypertension range. Pulse 72 bpm, within the typical resting range.
Blood pressure category
Stage 1 hypertension range
Systolic pressure is 130–139 or diastolic pressure is 80–89.
Category set by: Diastolic (bottom number)
Systolic reading
120 mmHg
Diastolic reading
80 mmHg
Pulse interpretation
72 bpm — Within the typical resting range
This is within the commonly quoted adult resting range of 60–100 bpm. The 60–100 bpm range is a general reference for adults at rest, not a diagnosis.
Personalized interpretation
Your reading falls in the stage 1 hypertension range.
A single reading does not diagnose hypertension. Discuss repeated readings in this range with a healthcare professional.
Blood pressure and pulse can change due to posture, activity, stress, sleep, caffeine, hydration, medication, illness, and measurement technique.
Blood pressure category guide
Hypertension categories follow the 2025 AHA/ACC guideline for adults. The highest category reached by either number applies. The low blood pressure range is a separate general convention, not an AHA/ACC category. See the AHA blood pressure chart.
Normal
< 120 and < 80
Both numbers are below the elevated range.
Elevated
120–129 and < 80
Systolic pressure is above normal while diastolic remains below 80.
Stage 1 Hypertension
Your reading130–139 or 80–89
Either number in this range is enough to place a reading in stage 1.
Stage 2 Hypertension
≥ 140 or ≥ 90
Either number in this range is enough to place a reading in stage 2.
Severe Hypertension
> 180 or > 120
Repeat the reading. Symptoms alongside it need emergency care.
Low Blood Pressure
< 90 or < 60
A general convention, not an AHA/ACC category. Used only when no higher category applies.
What the numbers mean
How to measure accurately
Use a properly fitted cuff, sit with your back supported, keep your feet flat, and rest quietly before measuring.
Avoid caffeine, nicotine, exercise, or stress immediately before a reading when possible.
Multiple readings over time are usually more useful than one isolated reading.
Factors that affect blood pressure and pulse
Blood pressure and pulse can fluctuate throughout the day.
Healthy lifestyle considerations
Limitations and medical disclaimer
This tool is for education only. It does not diagnose a condition or account for your health history. Home readings vary, and a diagnosis of high blood pressure is based on repeated measurements reviewed by a qualified healthcare professional.
The categories are general adult ranges. They do not replace pregnancy-specific assessment or individual targets set by your clinician, and they are not intended for children.
Contact your local emergency services for chest pain, severe shortness of breath, stroke symptoms, confusion or fainting, whatever the reading. Discuss persistent abnormal readings, or low readings with dizziness or weakness, with a healthcare professional.
How to read a blood pressure result
Blood pressure is written as systolic over diastolic in mmHg. Pulse is a separate measurement in beats per minute and does not change the blood pressure category.
Example: 120/80 mmHg with a pulse of 72 bpm means 120 systolic, 80 diastolic, and 72 heartbeats per minute. Because the diastolic value is 80, this reading falls in the stage 1 hypertension range.
Frequently Asked Questions
Low blood pressure is commonly considered below 90 systolic or below 60 diastolic. Some people naturally have lower readings, but dizziness, fainting, weakness, confusion, or chest pain should be discussed urgently with a healthcare professional.
For many adults, a resting pulse is commonly between 60 and 100 beats per minute. Athletes and very active people may have lower resting pulse rates.
Normal blood pressure is commonly categorized as below 120 systolic and below 80 diastolic.
Systolic pressure is the top number and reflects pressure when the heart contracts. Diastolic pressure is the bottom number and reflects pressure between heartbeats.
Yes. Stress, anxiety, exercise, caffeine, nicotine, poor sleep, and some medications can temporarily affect blood pressure readings.
Seek emergency medical attention for chest pain, stroke symptoms, severe shortness of breath, fainting, confusion, or severe neurological symptoms.
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Estimate only. This calculator is for general education and planning. It is not medical advice, and not medical, nutrition, fitness, diagnosis, treatment, or emergency advice. Personal factors can change results. This tool does not diagnose blood pressure conditions or replace clinical measurement. If you have concerning symptoms or unusual readings, seek medical help. Speak with a qualified professional for personal guidance.