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What the 28-day interval means
Samsung’s US support guidance requires calibration every 28 days. Samsung Australia says the watch cannot take blood-pressure measurements once 28 days have passed since the last calibration. Follow the calibration status and prompts shown in your Samsung Health Monitor app; labels and prompts can vary by region and app version. Samsung US support and Samsung Australia support describe the interval and measurement limit.
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What you need to calibrate
Use a separate upper-arm cuff-based blood pressure monitor. Samsung’s US instructions specify three cuff readings, entered into Samsung Health Monitor within 30 minutes. The cuff is sold separately. Samsung does not identify a preferred retail model in its instructions, so choose a cuff that fits your arm and meets the applicable validation requirements in your location. Samsung Health Monitor explains the calibration requirement.
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Prepare for consistent readings
Samsung recommends the following before calibration:
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- Avoid smoking, bathing, exercise, alcohol, and caffeine for at least 30 minutes beforehand.
- Make sure your arm and wrist are dry and free of perspiration or lotion.
- Measure indoors in a quiet place. Sit with your back supported, feet flat, legs uncrossed, and forearms resting on a table.
- Rest in that position for at least five minutes before starting.
- Wear the watch snugly on the same wrist used for calibration.
For each cuff reading, stay still, do not move the arm or talk, and breathe normally. Follow the app’s on-screen instructions.
Calibrate or recalibrate the watch
- Open Samsung Health Monitor on your phone and choose Blood pressure.
- Select Calibrate the watch and follow the prompts to connect the cuff reading process.
- Take three readings with the upper-arm cuff and enter each one in the app within 30 minutes, as instructed.
To recalibrate before the 28-day interval expires, Samsung’s UK route is Blood Pressure History > More > Recalibrate > Recalibrate the watch. The option is also described as available at any time on Samsung’s US app page. If the labels differ, use the current prompts in your local app. Samsung UK support gives the menu path.
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Check that the feature is available in your region
Availability depends on country, device, and software. Samsung’s US support page lists a Galaxy smartwatch running Wear OS 4.0 or later and a phone running Android 12 or later. Samsung says the feature is available on Galaxy Watch4 and later released models, excluding Galaxy Fit, subject to software conditions. Its US rollout announcement said a phased rollout began March 31, 2026, and notes that service may be restricted in unsupported regions. Check Samsung’s local support information and your app rather than assuming the feature is available everywhere. Samsung US support and the Samsung Newsroom US announcement provide these conditions.
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Samsung says the blood-pressure function is not intended to diagnose disease or other conditions, or to cure, mitigate, treat, or prevent disease. Treat its readings as wellness information, not a replacement for a clinical blood pressure monitor or professional care. Contact a physician about health concerns or treatment decisions. Samsung’s US support page states this limitation.
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- WHY GALAXY WATCH8: Advanced health and sleep tracking features.* A lighter, more snug design for all day comfort.* Improved user interface.* Personal AI assistant for hands free help.⁴* 2-Year Warranty.
- SLEEP SMARTER. LIVE BETTER: Energize your days with a great night’s rest using Advanced Sleep Coaching¹ - improved with even more ways to keep your nights on track. Plus, Bedtime Guidance² helps you find your optimal bedtime.
- YOUR RUN, YOUR COACH: Step up your running routine with a Running Coach³ that analyzes your performance and gives you real-time feedback. Training for an event? Try specific programs built for 5Ks, marathons and more.
- NEW DESIGN. LIGHTWEIGHT FEEL: Maximize your days with a minimalist design. The sleek, thinner-than-ever silhouette makes Galaxy Watch8 look as good as it functions. With a snug fit and sporty style, it gives you readings without getting in your way.
- A PERSONAL ASSISTANT, RIGHT ON YOUR WRIST: Your Watch just became your personal assistant.⁴ Stay one step ahead of your day with a watch that helps you navigate your tasks and to-do lists.
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