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Blood pressure calculator — ESH/ESC classification
Enter your systolic and diastolic blood pressure in mmHg and the calculator will classify them according to the 2018 European Society of Hypertension (ESH) and European Society of Cardiology (ESC) guidelines. Also calculate your mean arterial pressure (MAP). IMPORTANT: This result is for informational and educational purposes only. Diagnosis and treatment of hypertension requires a consultation with a doctor.
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How blood pressure is classified by ESH/ESC 2018
The ESH/ESC 2018 classification defines the following categories: - Optimal: < 120/80 mmHg - Normal: 120-129 / 80-84 mmHg - High normal: 130-139 / 85-89 mmHg - Grade 1 hypertension: 140-159 / 90-99 mmHg - Grade 2 hypertension: 160-179 / 100-109 mmHg - Grade 3 hypertension: >= 180/110 mmHg Mean arterial pressure (MAP) is calculated as: MAP = diastolic + (systolic - diastolic) / 3. The classification uses the worse of the two values (systolic or diastolic).
Example: blood pressure 120/80 mmHg
Blood pressure of 120/80 mmHg sits at the boundary of optimal and normal (systolic < 120 means optimal). MAP = 80 + (120-80)/3 = 93.33 mmHg. Blood pressure of 150/95 mmHg is Grade 1 hypertension — requires medical consultation and possible lifestyle changes or pharmacotherapy.
Frequently asked questions
What is blood pressure and how is it measured?
Blood pressure is the force exerted by blood on artery walls. It is expressed in mmHg as two numbers: systolic (during heart contraction) and diastolic (during relaxation). Measured with a blood pressure cuff. NOTE: This calculator is informational — diagnosis and treatment must be carried out by a doctor.
What is normal blood pressure according to ESH/ESC 2018?
Optimal: < 120/80 mmHg. Normal: 120-129 / 80-84 mmHg. High normal: 130-139 / 85-89 mmHg. Grade 1 hypertension: 140-159 / 90-99 mmHg. Grade 2: 160-179 / 100-109 mmHg. Grade 3: >= 180/110 mmHg.
What is hypertension?
Hypertension is chronically elevated blood pressure (>= 140/90 mmHg per ESH/ESC). It is the leading risk factor for stroke, heart attack and kidney disease. Diagnosis requires multiple measurements in different conditions and medical evaluation.
What is mean arterial pressure (MAP)?
MAP is the average pressure in the circulatory system during one cardiac cycle. Formula: MAP = diastolic + (systolic - diastolic) / 3. Normal range is approximately 70-100 mmHg.
When should I see a doctor about blood pressure?
Consult a doctor if your blood pressure regularly exceeds 140/90 mmHg, if you have symptoms (headache, dizziness, tinnitus) or if the calculator shows Grade 2 or 3 hypertension. Do not self-medicate. DISCLAIMER: This calculator does not replace medical advice.
How can I lower blood pressure without medication?
Lifestyle changes can effectively lower blood pressure: weight loss, DASH diet (rich in fruits, vegetables and low-fat dairy), limiting salt to < 5g/day, regular physical activity, quitting smoking and alcohol, and stress reduction.
What causes high systolic blood pressure?
Isolated systolic hypertension (high systolic, normal diastolic) is common in older people due to arterial stiffening. Other causes include stress, caffeine, medications, kidney or thyroid disease. Requires medical evaluation.
What is the difference between systolic and diastolic pressure?
Systolic pressure (upper number) is the pressure during heart contraction when blood is pumped into arteries. Diastolic (lower number) is pressure during relaxation. Pulse pressure is the difference between them.
Does stress raise blood pressure?
Yes — stress causes a temporary rise through adrenaline release. Chronic stress may contribute to persistently elevated blood pressure. Relaxation techniques, meditation and exercise help regulate it.
Does the calculator replace a doctor's measurement?
No. The calculator classifies the entered values according to ESH/ESC 2018 guidelines, but diagnosing hypertension requires multiple measurements under different conditions and medical evaluation. The result is for informational purposes only — it is not medical advice.
IMPORTANT DISCLAIMER (YMYL): This calculator is for informational and educational purposes only. It is not a diagnostic or medical tool. The result does not replace measurement by qualified medical personnel, a doctor's advice or treatment. If you are concerned about your blood pressure, please consult a doctor.
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