Calculadora de Pressão Arterial (MAP)
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
MAP = (2·PAD + PAS) / 3
About this calculator
The Mean Arterial Pressure (MAP) calculator is a practical tool to estimate the average pressure in the arteries during a cardiac cycle. It uses the systolic (SBP) and diastolic (DBP) blood pressure values entered by the user, applying the standard formula: MAP = (2 * DBP + SBP) / 3. The result is displayed in mmHg, the standard unit for blood pressure. This calculator is useful for healthcare professionals and patients who want to quickly assess tissue perfusion.
MAP calculation is essential to evaluate blood flow to vital organs such as the brain and kidneys. Normal values range from 70 to 100 mmHg. Below 60 mmHg may indicate hypoperfusion (risk of organ damage), while above 100 mmHg suggests hypertension. The formula gives more weight to DBP because the heart spends more time in diastole than systole. Thus, DBP has a greater influence on the average.
Use this calculator during routine medical check-ups, critical patient monitoring, or to adjust antihypertensive medications. Remember that MAP is an estimate; exact values require invasive monitoring. Also, accuracy depends on proper blood pressure measurement: avoid talking or moving during measurement, and use an appropriately sized cuff.
Precautions: the calculator does not replace medical evaluation. Abnormal results should be interpreted by a professional. In emergencies (syncope, chest pain), seek immediate care. MAP may vary with exercise, stress, or medications; always measure under standardized conditions (5-minute rest, arm supported at heart level).
Frequently asked questions
What does a MAP value below 60 mmHg mean?
It indicates risk of hypoperfusion, meaning insufficient blood flow to vital organs. It can lead to kidney, brain, or heart damage. Seek urgent medical attention.
Can I use this calculator to diagnose hypertension?
No. MAP is a complementary parameter. Hypertension diagnosis is based on multiple resting systolic and diastolic measurements, according to medical guidelines.
Does the formula work for children and pregnant women?
Yes, the formula is the same. However, reference values vary by age, weight, and condition. Consult a pediatrician or obstetrician for proper interpretation.
What is the difference between MAP and office blood pressure?
Office blood pressure gives SBP and DBP at a specific moment. MAP is a calculated average reflecting pressure throughout the entire cardiac cycle, being more representative of tissue perfusion.
Should I measure blood pressure before or after taking medication?
Ideally, measure before medication to assess blood pressure control. Follow your doctor's guidance on the best time for measurement.