Yes—supported Samsung Galaxy Watches can measure blood oxygen (SpO₂) in Samsung Health, either as an on-demand reading or, on supported Wear OS models, during sleep. Availability depends on the watch model, regional variant, and configuration. Samsung describes this as a fitness and wellness feature, not a medical test.
Which Samsung watches can measure blood oxygen?
Samsung Australia’s support guide, last updated August 20, 2026, lists the Galaxy Watch3, Watch4, Watch4 Classic, Watch5, Watch5 Pro, Watch6, Watch6 Classic, Watch7, Watch FE, Watch8, Watch8 Classic, Watch Ultra, Watch9, and Watch Ultra2. The list also includes Galaxy Fit3. This is a list for Australian-variant devices, not a guaranteed worldwide compatibility list. If you have an international model, consult Samsung support for your region and check whether Blood Oxygen appears in Samsung Health. Samsung Australia’s compatibility and measurement guide
As an Amazon Associate I earn from qualifying purchases.
Samsung’s developer documentation covers a different scope: its Health Sensor SDK supports Galaxy Watch4 series and later devices running Wear OS powered by Samsung, and includes SpO₂ as a sensor data type. That information is for developers and should not be treated as a complete consumer compatibility list. Samsung Health Sensor SDK overview
How to take an on-demand reading
- Open Samsung Health on the watch.
- Scroll to and select Blood Oxygen.
- Follow the on-screen instructions and tap Measure.
- Stay still while the watch takes the reading. Samsung recommends resting for at least five minutes first and placing your hand on a table near heart level.
- View the blood oxygen level and beats per minute when the measurement finishes.
For a more reliable attempt, wear the watch securely on top of your wrist—not on the underside or directly over the wrist bone—and avoid moving or talking. If your hands or arms are cold, gently warm the skin and try again. Samsung’s developer guidance also emphasizes wrist position, pose, and avoiding movement. Samsung Health Sensor SDK measurement guidance
#1 Best Overall
![Samsung Galaxy Watch 8 40mm Bluetooth Smartwatch, Cushion Design, Quick Button, Sleep Coaching, Now Bar, Running Coach, Energy Score, Graphite [US Version, Amazon Exclusive 2Yr Warranty]](https://m.media-amazon.com/images/I/41pVUmtVzHL._SL160_.jpg)
- 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.
How to record blood oxygen during sleep
- Open Samsung Health on a supported Wear OS Galaxy Watch.
- Go to Settings.
- Turn on Blood oxygen during sleep.
- Wear the watch securely overnight. The next morning, check the Sleep tile on the watch or Samsung Health on the connected phone for the blood oxygen percentage.
These steps follow Samsung’s US support instructions; menus and availability can vary by device and region. Samsung US: measure blood oxygen with a Galaxy Watch
What the reading can—and cannot—tell you
Samsung Australia describes 95% to 100% as a “typically healthy range,” while noting that exercise, elevation, and health conditions can affect results. This is general support guidance, not an individualized threshold or a diagnosis. Samsung says the Galaxy Watch is not a medical or therapeutic device and that its blood oxygen feature is intended for fitness and wellness, not for diagnosing, treating, curing, mitigating, or preventing disease. Samsung Australia’s blood oxygen guidance
Rank #2
![Samsung Galaxy Watch9, Graphite, 40mm Bluetooth Smartwatch | AI Assistant, Fitness Tracker, Sleep Coaching and Running Coaching with Heart Rate Tracking [US Version, 2 Yr Warranty]](https://m.media-amazon.com/images/I/31Q6G58gP9L._SL160_.jpg)
- TRACK HEALTH PATTERNS¹ IN YOUR SLEEP WITH VITALS²: Stay aware of the subtle changes in your body with Vitals¹–it tracks health metrics while you sleep, catches shifts from your usual patterns, and provides tailored guidance based on the insights.²
- A PERSONALIZED COACH FOR YOUR FITNESS GOALS: Whether you're building endurance for a long trek or training to build muscle, Fitness Index³ delivers tailored guidance based on your fitness level goals. Finally, train smarter with your fitness watch.
- EVERYDAY AI ASSISTANCE, SIMPLIFIED: With the Galaxy Watch9, you can just raise your wrist, start talking naturally and get instant AI assistance⁴—no wake phrase needed. This smart watch won’t slow you down.
- ONE PERSONALIZED SCORE TO KNOW YOUR HEART BETTER: Instead of checking multiple metrics separately, track the single Heart Health Score⁵ based on sleep time, BMI, activity and vascular load to stay aware of your wellness.
- TRACK YOUR NIGHTS. OWN YOUR DAYS: Galaxy Watch9 gives you personalized recommendations and habit-building guidance with Advanced Sleep Coaching.⁶ Plus, Bedtime Guidance⁷ helps you find your optimal bedtime so you can wake up feeling refreshed.
A watch reading should not be treated as a substitute for medical advice or a clinical pulse oximeter. The available Samsung material does not establish an independent clinical accuracy comparison or a device-validation statistic, so no accuracy percentage can be inferred from it.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Blood oxygen tracking is not the same as Samsung’s sleep apnea feature
Samsung’s separate sleep apnea feature uses overnight blood oxygen saturation patterns to estimate an apnea-hypopnea index and inform users about potential symptoms. Samsung’s June 5, 2025 announcement says it is intended for adults aged 22 and older over a two-night monitoring period, is not intended for people previously diagnosed with sleep apnea, and is available only in certain markets. It is a distinct Samsung Health Monitor feature—not a spot oxygen check or a general-purpose diagnosis. Samsung announcement on sleep apnea feature availability
Quick Recap
Best Value
![SAMSUNG Galaxy FIT 3 [2024] 1.6' AMOLED Display | 14 Days Battery Life | 100+ Watchfaces | 100+ Exercise Modes | International Model - (Gray)](https://m.media-amazon.com/images/I/31JyN7HkB8L._SL160_.jpg)
- Vibrant 1.6” AMOLED Display – Large, high-res screen with smooth touch for easy navigation
- 5ATM & IP68 Water Resistance – Swim-ready and dust-resistant for active lifestyles
- Up to 14 Days Battery Life – Powerful 208mAh battery for long-lasting performance
- 101+ Workout Modes with Auto Detection – Automatically tracks common workouts for seamless fitness tracking. Advanced Health Tracking – Includes sleep coaching, SpO2, heart rate, and snore detection
- International Model No Warranty in the US. ONLY compatible with Android devices. Samsung Pay - Not Supported. NOT compatible with iPhone or iOS devices.
Rank #4
![Samsung Galaxy Watch 8 Classic 46mm Bluetooth Smartwatch, Cushion Design, Rotating Bezel, Quick Button, Sleep Coaching, Running Coach, Energy Score, Black [US Version, Amazon Exclusive 2Yr Warranty]](https://m.media-amazon.com/images/I/51Vc6CWcxAL._SL160_.jpg)
- WHY GALAXY WATCH8 CLASSIC: Timeless design.* New lug system for easy band detachment & replacement.* Advanced health & sleep tracking features for total body wellness.* Improved user interface.* Personal AI assistant for hands free help.¹* 2-Yr Warranty
- BUILT TO PERFORM. DESIGNED TO IMPRESS: Show off your style with an iconic design that blends tradition with cutting-edge innovation.¹ A brighter screen makes everything easy to see, and a rotating bezel gives you access to your favorite apps
- YOUR EVERY COMMAND, RIGHT ON YOUR WRIST: Get a little extra help with day-to-day tasks. Galaxy Watch 8 Classic features a personal AI assistant¹ that helps you get things done hands-free. Simply speak the command and your Watch makes it happen
- UNLOCK THE SECRETS TO BETTER SLEEP: When you get good sleep, it feels like anything is possible. Start each day with more energy and better focus using Advanced Sleep Coaching² - improved with even more ways to help you sleep smarter
- QUICK UPDATES, AT A GLANCE: Get updates, select apps and more with Now Bar³,⁴ and an improved user experience. Now Bar conveniently puts the info you use the most - like weather, news and more - right on your main Watch screen
Rank #3
![Samsung Galaxy Watch 8 40mm Bluetooth Smartwatch, Cushion Design, Quick Button, Sleep Coaching, Now Bar, Running Coach, Energy Score, Silver [US Version, Amazon Exclusive 2Yr Warranty]](https://m.media-amazon.com/images/I/31LaWf6wVqL._SL160_.jpg)
- 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.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
