Samsung Galaxy Watch Blood Pressure: How It Works, Which Models, US Status

How Samsung Galaxy Watch blood pressure monitoring works

Samsung Galaxy Watch blood pressure monitoring relies on photoplethysmography (PPG), the same optical sensor technology used for heart rate tracking. PPG sensors emit green LED light into the skin and measure how much light is reflected back. When blood pulses through your wrist arteries with each heartbeat, the blood volume in the vessels changes, which changes the amount of light absorbed.

Samsung's implementation analyzes the shape and timing of these pulse waveforms (specifically, the pulse wave velocity and pulse arrival time) to estimate systolic and diastolic blood pressure. The faster the pulse wave travels, the stiffer the arteries, which correlates with higher blood pressure.

This approach is fundamentally different from traditional cuff-based monitors, which physically compress the artery and listen for Korotkoff sounds or oscillometric pulses. PPG-based estimation is indirect and depends on algorithmic correlation between waveform characteristics and actual pressure. This is why calibration is required.

The calibration requirement

Before your Samsung Galaxy Watch can measure blood pressure, you must calibrate it against a traditional cuff monitor. The calibration process involves:

• Taking three blood pressure readings within 30 minutes with an upper-arm cuff on one arm while wearing the Galaxy Watch on the wrist of the other arm
• Manually entering each cuff reading into the Samsung Health Monitor app on your phone
• The watch algorithm uses these reference readings to personalize its PPG-based estimation model for your specific physiology

Samsung requires recalibration every 28 days. After 28 days, the blood pressure measurement feature disables itself until you complete another calibration. This mandatory recalibration window reflects the reality that PPG-based blood pressure estimation degrades over time as your vascular properties change with hydration, temperature, activity, and other factors.

Which Samsung Galaxy Watch models support blood pressure monitoring

Blood pressure monitoring is available on all Samsung Galaxy Watch models released since the Galaxy Watch Active 2, which gained the feature in South Korea in 2020. All recent models use the BioActive Sensor, a unified chip that combines PPG, ECG, and bioelectrical impedance analysis sensors.

All of these models have the hardware capability for blood pressure monitoring. Whether the feature works on yours depends on where you bought it, because Samsung says the Samsung Health Monitor app only works on watches and phones bought in a country or region where the service is available. In the US, Samsung supports it on the Galaxy Watch 4 and later, running Wear OS 4.0 or later and paired with a Samsung Galaxy phone running Android 12 or later.

Country availability: where Samsung blood pressure works

Samsung Galaxy Watch blood pressure monitoring is officially available in over 30 countries, and since March 31, 2026 the United States has been one of them. The feature first launched in South Korea in 2020, then expanded to select markets in Europe, Asia, and Latin America as Samsung obtained regulatory clearances. In the US, Samsung offers it as a wellness feature without FDA clearance.

In supported countries, the feature works through the official Samsung Health Monitor app, which you download from the Galaxy Store once your watch is connected to a Galaxy phone. Samsung says the app only works on watches and phones bought in a country or region where the service is available, and it may stop working if you reset your phone or reinstall the app while traveling somewhere the service is not offered.

Is Samsung blood pressure FDA-cleared in the US?

No. The US Food and Drug Administration (FDA) reviews blood pressure monitors sold as medical devices, and its device database lists no clearance for the Galaxy Watch feature (checked October 2026). Samsung offers it in the US as a wellness feature instead. Its US pages say blood pressure monitoring is for wellness only and is not intended to diagnose or treat any medical condition.

Apple received FDA clearance in 2025 for hypertension detection on Apple Watch Series 9/10/11 and Ultra 2/3, but Apple's feature is fundamentally different. Apple Watch does not provide actual blood pressure readings. Instead, it analyzes patterns over 30-day periods and alerts users if signs of hypertension are detected. Apple's alert went through FDA review, while Samsung offers its readings in the US without FDA clearance.

That difference matters for how you use the numbers. Samsung gives you specific systolic and diastolic readings, which are easy to treat as diagnostic, and the FDA has not reviewed how accurate they are. The 2025 American Heart Association and American College of Cardiology guideline also says people should avoid relying on cuffless devices, including smartwatches, for accurate blood pressure readings until those devices show greater precision and reliability. Treat Galaxy Watch readings as a guide, and check anything surprising with a validated upper-arm cuff.

How to set up blood pressure monitoring on Samsung Galaxy Watch

The supported way to turn on blood pressure monitoring is Samsung's own Samsung Health Monitor app, in a country or region where Samsung offers the feature. In the US, Samsung began a phased rollout on March 31, 2026, so the option may take a while to reach your watch.

Samsung's setup guide lists these steps:

• Check that your watch is supported. In the US, that means a Galaxy Watch 4 or later running Wear OS 4.0 or later (Samsung excludes the Galaxy Fit), paired by Bluetooth with a Samsung Galaxy phone running Android 12 or later
• Update the watch to the latest software through the Galaxy Wearable app on your phone
• Open Samsung Health Monitor on the watch and follow the prompt to download the phone app from the Galaxy Store
• Open the app on your phone, agree to the terms and set up your profile (you must be at least 22)
• Tap Blood pressure, then Calibrate the watch, and complete the calibration with an upper-arm cuff

If blood pressure does not appear after you update, check again later while the US rollout continues. Samsung also says the app only works on watches and phones bought in a country or region where the service is available.

Blood pressure accuracy: Samsung Galaxy Watch vs cuff monitors

Studies published by Samsung and independent researchers report that, after proper calibration, Samsung Galaxy Watch blood pressure readings are usually within about 5-8 mmHg of a reference cuff for most users. That makes the watch less precise than a validated upper-arm cuff, which is why the guideline above says not to rely on it for accurate readings. Use it to spot trends, and check anything surprising with a cuff.

However, accuracy varies depending on:

• How recently you calibrated (accuracy degrades between calibrations)
• How still you sit during measurement (movement introduces noise)
• Wrist position and watch fit (the watch must be snug and positioned correctly)
• Individual physiology (people with irregular heartbeats, very low or very high BP, or peripheral artery disease see larger errors)

For comparison, continuous wearable BP monitors like Aktiia and RingConn use similar PPG-based approaches but with different calibration and algorithm strategies. Samsung's approach is more user-friendly (you can take a reading on demand) but requires frequent recalibration to maintain accuracy.

How to measure blood pressure using Samsung Galaxy Watch

Once your Galaxy Watch is calibrated, taking a blood pressure reading is straightforward:

• Sit in a relaxed position with your wrist supported at heart level
• Make sure the watch is snugly fitted on the wrist you used during calibration (not too loose, not cutting off circulation)
• Open the Samsung Health Monitor app on the watch and navigate to the Blood Pressure widget
• Tap "Measure" and remain completely still for 30-40 seconds while the watch analyzes pulse waveforms
• The watch displays systolic, diastolic, and pulse rate on the screen and syncs the reading to your phone

Results automatically sync to the Samsung Health app on your phone, where you can view history, add notes, and export data. Some users also sync their Samsung Health data to Google Fit or other platforms, though dedicated blood pressure tracking apps often provide better visualization and reporting for BP trends.

Samsung Galaxy Watch blood pressure vs Apple Watch approach

Apple and Samsung take fundamentally different approaches to wrist-based blood pressure monitoring:

Apple's approach sacrifices specificity (no actual BP numbers) for regulatory simplicity and user safety. By only alerting users to potential hypertension rather than giving readings, Apple avoids the risk of users self-diagnosing or self-treating based on potentially inaccurate numbers.

Samsung's approach is more useful for people who already know they have hypertension and want to track it daily, but it requires more user discipline (calibration every 28 days) and has not achieved FDA approval in the United States.

Limitations and who should not rely on Samsung Watch BP monitoring

Samsung explicitly states that Galaxy Watch blood pressure monitoring is designed for wellness and fitness tracking, not for diagnosing medical conditions. The feature should not be used:

• As a substitute for regular medical checkups or prescribed blood pressure monitoring
• To adjust blood pressure medication dosage without consulting your doctor
• In medical emergencies (if you suspect dangerously high or low blood pressure, use a validated cuff monitor and seek medical attention)
• In people under 22 years old (not validated for pediatric or young adult populations)
• In people with arrhythmias like atrial fibrillation (irregular heartbeats reduce PPG accuracy)

If you have diagnosed hypertension, your doctor will still want you to use a traditional cuff-based monitor for clinical decision-making. Samsung Galaxy Watch readings can supplement your tracking but should not replace the measurements your doctor reviews when adjusting medication or evaluating treatment effectiveness.

The bottom line

Samsung Galaxy Watch blood pressure monitoring is one of the most advanced consumer wearable BP tracking features available globally, and since March 31, 2026 Samsung has been rolling it out to users in the United States. If you are in a supported country like Canada, the UK, South Korea or the US, the feature provides a convenient way to track blood pressure trends as long as you calibrate every 28 days and understand the accuracy limitations.

In the US it is a wellness feature without FDA clearance, so treat the readings as a guide and turn it on only through the official Samsung Health Monitor app. If you would like to compare it with other wearable BP monitors, see our guide.

Regardless of device, remember that wearable blood pressure monitoring complements but does not replace traditional measurement. Keep a validated home cuff monitor for calibration and verification, track your readings consistently, and share the data with your doctor to make informed decisions about your cardiovascular health.