Blood Pressure Average Calculator

By CalculatorBolt Team • Published: • Updated: • Reviewed by: Medical & Health Editor

Calculate the average of multiple blood pressure readings. Enter systolic and diastolic measurements to get average BP, Mean Arterial Pressure (MAP), and classification based on AHA/ACC guidelines. This is for informational purposes only and not a substitute for medical advice. Explore more tools on free calculators on CalculatorBolt.

Blood Pressure Average Calculator

# Date Time Systolic
(mmHg)		 Diastolic
(mmHg)		 Pulse
(bpm)		 Action

How It Works

This calculator computes the average of multiple blood pressure readings using the following formulas:

Average Systolic = Σ(Systolic) / Number of Readings

Average Diastolic = Σ(Diastolic) / Number of Readings

Mean Arterial Pressure (MAP) = (Average Diastolic × 2 + Average Systolic) / 3

We then classify the average blood pressure based on American Heart Association (AHA) and American College of Cardiology (ACC) guidelines:

  • Normal: < 120/< 80 mmHg
  • Elevated: 120-129 / < 80 mmHg
  • Hypertension Stage 1: 130-139 / 80-89 mmHg
  • Hypertension Stage 2: ≥ 140 / ≥ 90 mmHg
  • Hypertensive Crisis: > 180 / > 120 mmHg

Inputs Explained

Date & Time
Record when each blood pressure measurement was taken. This helps track trends and identify patterns throughout the day.
Systolic Pressure
The higher number in a blood pressure reading, measured in mmHg. It represents the pressure in your arteries when your heart beats.
Diastolic Pressure
The lower number in a blood pressure reading, measured in mmHg. It represents the pressure in your arteries when your heart rests between beats.
Pulse Rate
Heart rate in beats per minute (bpm). While not used in blood pressure classification, it provides additional cardiovascular information.

Example Calculation

Three Blood Pressure Readings

  • Reading 1: 120/80 mmHg
  • Reading 2: 125/82 mmHg
  • Reading 3: 118/78 mmHg

Calculation:

Average Systolic = (120 + 125 + 118) / 3 = 121 mmHg

Average Diastolic = (80 + 82 + 78) / 3 = 80 mmHg

MAP = (80 × 2 + 121) / 3 = 93.7 mmHg

Classification: Elevated (121/80 mmHg)

Tips & Notes

  • Consistency is Key: Take multiple readings at the same time of day for the most accurate average. Morning and evening measurements are recommended.
  • Rest Before Measuring: Sit quietly for 5 minutes before taking a blood pressure reading. Avoid caffeine, exercise, and smoking for 30 minutes beforehand.
  • Proper Positioning: Sit with your back supported, feet flat on the floor, and arm at heart level. Don't cross your legs.
  • Record Date and Time: Tracking when measurements are taken helps identify patterns and trends over time.
  • Multiple Readings: Healthcare professionals often average 2-3 readings taken 1-2 minutes apart for the most accurate assessment.
  • White Coat Syndrome: Blood pressure can be higher in medical settings due to anxiety. Home monitoring provides a more accurate picture.
  • Monitor Regularly: If you have hypertension or are at risk, monitor your blood pressure regularly as advised by your healthcare provider.
  • Calibrate Your Device: Ensure your home blood pressure monitor is validated and calibrated. Bring it to your doctor's office to compare readings.

Frequently Asked Questions

According to the American Heart Association (AHA) and American College of Cardiology (ACC) guidelines, normal blood pressure is less than 120/80 mmHg. This means systolic pressure below 120 and diastolic pressure below 80. Normal blood pressure is associated with the lowest risk of cardiovascular disease.

MAP is calculated using the formula: MAP = (Diastolic × 2 + Systolic) / 3. It represents the average arterial pressure during one cardiac cycle and is an important indicator of tissue perfusion. A MAP of 70-100 mmHg is generally considered normal for adequate organ perfusion.

Averaging multiple readings provides a more accurate representation of your typical blood pressure. Single readings can be affected by stress, recent physical activity, time of day, or white coat syndrome (elevated readings in medical settings). Healthcare professionals often average multiple readings taken over several visits for diagnosis.

No. This calculator provides an estimate based on standard blood pressure guidelines. It is informational only and not a substitute for medical advice, diagnosis, or treatment. Always consult a healthcare professional for proper blood pressure assessment and management.

High blood pressure (hypertension) is defined as Stage 1 (130-139/80-89 mmHg) or Stage 2 (≥140/≥90 mmHg). A hypertensive crisis occurs when readings exceed 180/120 mmHg and requires immediate medical attention. Elevated blood pressure (120-129/<80) indicates you're at risk for developing hypertension.

No. All calculations run entirely in your browser. No data is sent to any server or stored online. Your health information remains completely private. Use the Export or Share Link features to save your readings locally for your own records.

Measure blood pressure at the same time each day, typically in the morning before eating or taking medications, and in the evening before dinner. Avoid caffeine, exercise, and smoking for 30 minutes before measuring. Rest for 5 minutes in a quiet place before taking a reading. Consistency in timing helps identify true patterns.

Elevated blood pressure is a systolic reading between 120-129 mmHg with a diastolic reading below 80 mmHg. This category indicates you're at risk for developing high blood pressure (hypertension) and should adopt lifestyle changes such as diet modification, exercise, stress reduction, and weight management to prevent progression.

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