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Blood Pressure Calculator - High and Low Blood Pressure Numbers

Last Updated on Apr 25, 2023

Unsure about what your blood pressure numbers mean? Don't know if they indicate high blood pressure or low blood pressure?
If you have recently checked your blood pressure and know the top and bottom numbers, we suggest that you key the numbers in the box below and instantly get an idea whether it is normal or abnormal. The calculator evaluates your blood pressure by comparing it to the standard range for your age group, identifying any deviations from the norm. The final result will help you understand why it is important to regularly keep track of your blood pressure readings and gives tips on how to maintain a normal blood pressure.
The American Heart Association (AHA) and other medical organizations recommend that people with high blood pressure or hypertension monitor their blood pressure at home. Home monitoring(1 Trusted Source
Home monitoring confirms clinic diagnosis of high blood pressure

Go to source
) is easy and saves both time and money and at the same time avoids white coat hypertension(2 Trusted Source
Mallion JM. Clinical significance and treatment requirements in white coat and masked hypertension. Special Issues in Hypertension. 2012;13-24. DOI:10.1007/978-88-470-2601-8_2

Go to source
) Blood pressure is a 'mathematical representation' of two forces(3 Trusted Source
Mathematical Modeling of Noninvasive Blood Pressure Estimation Techniques-Part II: Brachial Hemodynamics. Mauro Ursino, Cristina Cristalli. J Biomech Eng. Feb 1995, 117(1): 117-126 (10 pages)

Go to source
). The top number (systolic) is the force applied against the walls of the arteries when the heart beats and the bottom number (diastolic) is the force applied against the walls between the two beats of the heart (i.e. when heart is in a relaxed state). A blood pressure range of 110/70 to 120/80 is considered normal.

Calculate your Blood Pressure Numbers

Gender *
Age *
Systolic pressure (Top number) /
Diastolic pressure (Bottom number) *
(mm Hg)
Are you taking any blood pressure tablets? *   
* Required

Note: This calculator is only for people over 15 years of age
The readings should be taken when a person is in a relaxed and resting state. The test should be repeated at different intervals of the day or over a few days until similar values are consistently obtained. Measurement should be avoided immediately after exercise or a meal, as blood pressure may be high at these times.
Beware also of the White Coat Syndrome! It is a condition in which some people blood pressure is high in a doctor’s office but normal at home. This may be because of anxiety and stress. White Coat Syndrome may lead to misdiagnosis and unnecessary treatment.

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Foods that Can Lower Your High Blood Pressure - Slideshow


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Do remember that it is important to measure the blood pressure (BP) properly for the management of hypertension(4 Trusted Source
Measurement of Blood Pressure in Humans: A Scientific Statement From the American Heart Association | Hypertension 2019; 73:e35-e66. DOI: 10.1161/HYP.0000000000000087.

Go to source
) and this may require more than one reading with the right cuff size, its correct positioning on the arm, remaining still and avoiding caffeinated drinks or smoking(5 Trusted Source
Monitoring Your Blood Pressure at Home

Go to source
). Both manual or automated blood pressure measurement requires the same precautions.

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Monitoring Blood Pressure at Home

High blood pressure or hypertension  is a silent disease and is a major cause of death (6 Trusted Source
High Blood Pressure

Go to source
). There maybe no symptoms or very subtle indicators like anxiety, excessive sweating, palpitation, fatigue, dizziness or ringing in the ear. Monitoring the blood pressure at home can prevent the complications such as heart attack and stroke associated with high blood pressure(7 Trusted Source
Health Threats From High Blood Pressure

Go to source
).  Home blood pressure devices usually use automatic blood pressure cuff and gauge. Buy one that is authenticated by validated by a reputable medical association. The following instructions can help with the home monitoring of your blood pressure-

  • Preparation for reading – Avoid caffeinated drinks and smoking. Empty your bladder and you should not have done any exercise for at least 30 minutes prior to the reading. Also avoid looking at your cell phones or watch TV during it measurement.(8 Trusted Source
    8 steps to ensure your patients get their BP right

    Go to source
    )
  • Timing of the Reading -Take the reading at the same time everyday – either in morning or evening or at both time.(9 Trusted Source
    Monitoring Your Blood Pressure at Home

    Go to source
    )
  • Be still when taking the reading – Take rest for 5 minutes before the reading and be still as moving can affect the reading.(10 Trusted Source
    How to use a blood pressure monitor

    Go to source
    )
  • Take the right posture by sitting correctly – Sit on a dining chair rather than sofa with your back straight and supported. Keep you feet flat on the floor and not crossed. Your elbow should be supported flat on the table and the cuff should be where your mid- chest is so that it is t the same level as your heart.(11 Trusted Source
    Home Blood Pressure Monitoring Explained

    Go to source
    )
  • Bare the Arm for the Reading – Tie the cuff on the bare arm, so either take of the shirt or pull up your sleeves.
  • Choose the right cuff & Tying the cuff-  Depending on your arm size you could choose between small, medium and large cuff. It is best to ask the nurse or doctor what cuff size is best for your arm. The cuff should be tied snugly around your arm and two finger breadths above your elbow.(12 Trusted Source
    Blood Pressure Monitoring at Home

    Go to source
    )
  • Number of Readings– Take two to three readings at least one to two minutes apart. Use the same arm every day
  • Measure at the same time every day. It’s important to take the readings at the same time each day, such as morning and evening. It is best to take the readings daily for a week and jot it all down in the dairy. Show it to your doctor or nurse on your next visit to the doctor.(13 Trusted Source
    Self-Measurement of Blood Pressure at Home in the Management of Hypertension

    Go to source
    )

  • 1. Home monitoring confirms clinic diagnosis of high blood pressure
    (https://newsroom.heart.org/news/home-monitoring-confirms-clinic-diagnosis-of-high-blood-pressure?preview=3656)
  • 2. Mallion JM. Clinical significance and treatment requirements in white coat and masked hypertension. Special Issues in Hypertension. 2012;13-24. DOI:10.1007/978-88-470-2601-8_2
    (https://www.semanticscholar.org/paper/Clinical-Significance-and-Treatment-Requirements-in-Mallion/699c7d4ade259acf4755cdb54d93037c29de569d)
  • 3. Mathematical Modeling of Noninvasive Blood Pressure Estimation Techniques-Part II: Brachial Hemodynamics. Mauro Ursino, Cristina Cristalli. J Biomech Eng. Feb 1995, 117(1): 117-126 (10 pages)
    (https://doi.org/10.1115/1.2792259)
  • 4. Measurement of Blood Pressure in Humans: A Scientific Statement From the American Heart Association | Hypertension 2019; 73:e35-e66. DOI: 10.1161/HYP.0000000000000087.
    (https://www.ahajournals.org/doi/full/10.1161/HYP.0000000000000087)
  • 5. Monitoring Your Blood Pressure at Home
    (https://www.heart.org/en/health-topics/high-blood-pressure/understanding-blood-pressure-readings/monitoring-your-blood-pressure-at-home)
  • 6. High Blood Pressure
    (https://www.cdc.gov/bloodpressure/index.htm)
  • 7. Health Threats From High Blood Pressure
    (https://www.heart.org/en/health-topics/high-blood-pressure/health-threats-from-high-blood-pressure)
  • 8. 8 steps to ensure your patients get their BP right
    (https://www.ama-assn.org/delivering-care/hypertension/8-steps-ensure-your-patients-get-their-bp-right)
  • 9. Monitoring Your Blood Pressure at Home
    (https://www.heart.org/en/health-topics/high-blood-pressure/understanding-blood-pressure-readings/monitoring-your-blood-pressure-at-home)
  • 10. How to use a blood pressure monitor
    (http://www.bloodpressureuk.org/BloodPressureandyou/Homemonitoring/Howtomeasure)
  • 11. Home Blood Pressure Monitoring Explained
    (https://bihsoc.org/wp-content/uploads/2017/09/Home_blood_pressure_monitoring_explained.pdf)
  • 12. Blood Pressure Monitoring at Home
    (https://familydoctor.org/blood-pressure-monitoring-at-home/)
  • 13. Self-Measurement of Blood Pressure at Home in the Management of Hypertension
    (http://www.clinmedres.org/content/3/1/19.long)

Post a Comment

Comments should be on the topic and should not be abusive. The editorial team reserves the right to review and moderate the comments posted on the site.

Comments

leanne-

Great. Easy to understand the info and calculator

Ole70, Denmark

What is the source of the equations behind the blood pressure calculator?

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