How to Measure Blood Pressure at Home: Technique, Thresholds and When to Seek Care

Short answer: For an accurate home blood-pressure reading, use a validated automatic upper-arm cuff, sit quietly for at least five minutes, keep your back supported and feet on the floor, support the bare arm at heart level, and take two readings about one minute apart. A single reading is only a snapshot; diagnosis and treatment decisions are based on repeated measurements and clinical context.

Blood-pressure thresholds also depend on which guideline you are using. The United States and Europe currently use different diagnostic categories, so numbers should always be interpreted with the measurement setting and guideline in mind. Scope note: home readings can support monitoring, but this page does not diagnose hypertension or set an individual treatment target.

How to measure blood pressure correctly at home

The American Heart Association recommends an automatic, validated upper-arm cuff monitor. Wrist and finger monitors are less reliable and are not recommended as the default choice.

For a useful home measurement:

1. Avoid short-term BP raisers. Do not smoke, exercise or drink caffeinated beverages for at least 30 minutes before measuring. Empty your bladder.

2. Rest first. Sit quietly for at least five minutes. Do not talk, text or use the phone during the rest period or measurement.

3. Sit correctly. Keep your back supported, feet on the floor and legs uncrossed.

4. Use the right cuff size. An undersized or oversized cuff can produce misleading readings.

5. Put the cuff on bare skin. Do not measure over clothing.

6. Support the arm at heart level. The arm should rest on a table or other surface rather than being held up by muscle effort.

7. Take two readings. Wait about one minute between them and record both.

8. Look at averages, not isolated numbers. When home monitoring is being used to confirm hypertension, the 2024 European patient guideline recommends two readings in the morning and two in the evening for at least three days and ideally seven days, then using the average.

American Heart Association: Home Blood Pressure Monitoring.

Upper-arm cuff vs wrist monitor

The older version of this article suggested that a wrist monitor was acceptable as long as it was held at heart level. Position does matter, but this missed the more important point: major guidelines prefer validated upper-arm cuffs because wrist measurements are more vulnerable to positioning and technique errors.

If a standard upper-arm cuff cannot be used because of body size, anatomy or another practical limitation, the choice of device should be discussed with a clinician or pharmacist and the device should be validated for that use.

What counts as high blood pressure in the United States?

The 2025 ACC/AHA guideline retains the American classification based on average blood pressure:

Normal: less than 120/80 mm Hg.

Elevated: systolic 120–129 with diastolic below 80.

Stage 1 hypertension: systolic 130–139 or diastolic 80–89.

Stage 2 hypertension: systolic at least 140 or diastolic at least 90.

The 2025 guideline generally uses a treatment goal of below 130/80 mm Hg for adults receiving blood-pressure treatment, while decisions about starting medication below 140/90 depend on cardiovascular risk, comorbidities and response to lifestyle measures.

2025 ACC/AHA High Blood Pressure Guideline: key recommendations.

What counts as hypertension in Europe?

The 2024 European Society of Cardiology guideline uses a different classification.

For office blood pressure:

Not elevated: below 120/70 mm Hg.

Elevated BP: 120–139 systolic or 70–89 diastolic.

Hypertension: at least 140/90 mm Hg.

For home blood pressure, the ESC patient guideline uses an average of 135/85 mm Hg or higher as the hypertension threshold.

This difference is one reason a person can read that “hypertension starts at 130/80” on an American site and “hypertension starts at 140/90” on a European site without either source necessarily being wrong. They are using different guideline systems.

2024 ESC Guidelines for Elevated Blood Pressure and Hypertension.

What is the current European treatment target?

This is where the old article was most out of date.

The 2018 ESC/ESH guideline used different systolic targets for younger and older groups. The 2024 ESC guideline simplified the main treatment goal: for most adults receiving BP-lowering treatment, the target is 120–129/70–79 mm Hg, provided it is well tolerated.

There are important exceptions. Frailty, orthostatic symptoms, very advanced age, limited life expectancy and certain comorbidities may require individualized targets. A target is not a command to push every person’s pressure down regardless of symptoms.

ESC 2024 essential messages.

Why home and office readings can differ

Some people have higher readings in a medical setting than at home, known as white-coat hypertension. Others have normal office readings but elevated pressure outside the clinic, known as masked hypertension.

That is why both European and American guidance place increasing emphasis on home or ambulatory measurements when confirming a diagnosis and monitoring treatment.

A home series taken with a validated device and consistent technique is usually much more informative than one unusually high or low measurement.

What if one reading is very high?

One unexpected high reading is not automatically an emergency. Sit quietly and repeat the measurement using correct technique.

The American Heart Association advises that if blood pressure is still above 180/120 mm Hg after repeating it, prompt medical contact is warranted.

If a reading above 180/120 mm Hg occurs together with symptoms such as chest pain, shortness of breath, weakness or numbness, vision change, back pain or difficulty speaking, this can represent a hypertensive emergency and requires emergency medical care.

What about low blood pressure?

There is no single number that defines dangerously low blood pressure for everyone. A reading that is normal for one person can be symptomatic for another.

The clinically important question is whether low readings are accompanied by dizziness, fainting, weakness, confusion, chest symptoms, dehydration or other signs of impaired circulation. Recurrent symptoms deserve medical assessment even if the number does not look dramatically low.

Bottom line

For home measurements, technique matters enough to change the result by clinically meaningful amounts. Use a validated upper-arm device, the correct cuff size, five minutes of rest, a supported arm at heart level and repeated readings.

Do not interpret a blood-pressure number without context:

United States: hypertension categories begin at 130/80 mm Hg under ACC/AHA definitions.

Europe: office hypertension remains at 140/90 mm Hg, while a home average of 135/85 mm Hg or higher meets the ESC home threshold.

Treatment targets: the current U.S. goal is generally below 130/80 mm Hg; the 2024 ESC target for most treated adults is 120–129/70–79 mm Hg if tolerated.

Those differences are guideline differences, not measurement errors. Your own treatment target can be different because age, cardiovascular risk, kidney disease, pregnancy, orthostatic symptoms and medication tolerance matter.

Sources

1. American Heart Association. Home Blood Pressure Monitoring. Reviewed August 2025.

2. ACC/AHA et al. 2025 High Blood Pressure Guideline.

3. European Society of Cardiology. 2024 ESC Guidelines for the Management of Elevated Blood Pressure and Hypertension.

4. European Society of Cardiology. Patient Guidelines: Elevated Blood Pressure and Hypertension.