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Galaxy Watch3 LTE (45mm)

Galaxy Watch3

A close-up of a 45mm Galaxy Watch3 in Mystic Black with a Sporty Classic watch face appears from the left. Then a close-up of a 41mm Galaxy Watch3 in Mystic Bronze appears from the right with the Blood Oxygen GUI showing on its watch face. As it goes toward the center of the screen, the watch face GUI changes to show the ECG measurement feature.

The most advanced health monitor on a smartwatch

The watch that watches out for you. Galaxy Watch3 combines smartphone-level productivity and leading health technology in one premium and classic device. Our most advanced Galaxy watch yet, Galaxy Watch3 helps you effortlessly manage your life and health — putting your well-being in your hands.1, 2, 3, 4

As the 45mm Galaxy Watch3 in Mystic Black rotates, it turns into a 45mm Galaxy Watch3 in Mystic Silver with an Analog Modular watch face. It continues rotating and turns into the 41mm in Mystic Bronze with the Female Classic watch face. Once it stops, multiple Galaxy Watch3’s with different watch faces appear to show all the different combinations.

CLASSIC AND PREMIUM

The only smartwatch with precision rotating bezel for app navigation

Take your pick of two sizes, 45mm or 41mm, each with a face you won't soon forget. Available in premium Mystic Black, Mystic Silver, and Mystic Bronze hues, the elegant design is outlined in a unique rotating bezel for a look that works around the clock.5

45mm Galaxy Watch3 in Mystic Black with a Sporty Classic Watch Face seen from an angle
45mm Galaxy Watch3 in Mystic Silver with an Analog Modular Watch Face seen from an angle
41mm Galaxy Watch3 in Mystic Bronze with a Female Classic Watch Face seen from an angle
41mm Galaxy Watch3 in Mystic Silver with an Analog Modular Watch Face seen from an angle

DIGNIFIED DESIGN

Bigger display, Yet lighter and slimmer for comfort wear

Outlined in a subtle rotating bezel, it's easier to see and focus on what matters with an even bigger screen. Galaxy Watch3 is thinner and smaller, yet about 15% lighter with a sophisticated look that's ideal for your wrist with its slimmed down frame.6

Man stretches his arms behind his back, showing off a 45mm Galaxy Watch3 in Mystic Black on his wrist with a Sporty Classic Watch Face.

LEATHER STRAP

Premium quality, down to the strap

Galaxy Watch3's design is polished off with a premium genuine leather strap. Aged leather creates a natural look, and when you turn it over, see strengthened leather that protects against discoloration.

An underside view of the 41mm Galaxy Watch3 in Mystic Bronze and 45mm Galaxy Watch3 in Mystic black, highlighting the premium leather strap.

WATCH FACE

Beauty with smarts to match

Complete Galaxy Watch3's signature look with the largest number of watch faces to choose from, all matching its sleek body. Make your own combination with over 40 complications, and see the useful information you need at a glance while easily accessing your favorite apps.

Front view of 45mm Galaxy Watch3 in Mystic Black surrounded by various watch faces, including Analog Modular, Digital Modular, Pattern Classic Watch Faces and weather, My Style, and Off center classic GUIs.

Take your health into your own hands, with your wrist

BLOOD PRESSURE

Monitor and track your blood pressure

Check your blood pressure via the Samsung Health Monitor App without regularly needing a cuff. Before first use simply calibrate with a cuff, then smart sensors measure your blood pressure through pulse wave analysis as you wear it. Check it daily to track trends and get reports right on your phone.7, 8, 9, 10, 11

Partial front view of a 45mm Galaxy Watch3 in Mystic Black, showing blood pressure measurement GUI on its watch face.

ECG

Follow your heart rhythm with ECG monitoring

Touch the watch's back button for up to 30 seconds to have its built-in electrode sensor measure your heart rhythm. This ECG on the go tests for atrial fibrillation (Afib), then shows your measurements at a glance. See results over time from your phone, get the report, and share for more insights.12, 13, 14

A view of an arm wearing the 45mm Galaxy Watch3 in Mystic Black. A hand presses a button on the side of the watch to measure ECG, with its GUI seen on the watch face.

BLOOD OXYGEN

Breathe easier with built-in oxygen measurement

Galaxy Watch3 uses red LED and infrared rays to estimate your SpO2 levels, or the amount of oxygen in your bloodstream. Because this oxygen saturation is directly linked to physical performance, you can use Galaxy Watch3 to push your routine to the next level.15, 16, 17

Angled view of a 45mm Galaxy Watch3 in Mystic Black with Blood Oxygen measurement GUI.

Side view of a 45mm Galaxy Watch3 in Mystic Black with fall detection GUI.

Front view of a 45mm Galaxy Watch3 in Mystic Black with sleep score measurement GUI.

Angled view of a 45mm Galaxy Watch3 in Mystic Black with Blood Oxygen measurement GUI.

FALL DETECTION

Fall detection that won't fall down on the job

Explore fearlessly. Galaxy Watch3 automatically detects hard falls with its enhanced accelerometer, sending an SOS to your emergency contact with your location.18, 19, 20, 21

SLEEP SCORE

Get a better night's sleep

Galaxy Watch3 records your REM cycles, deep sleep, and total sleep time to score and help improve the quality of your rest. Samsung partnered with the National Sleep Foundation to include educational content and sleep tips right on your device, to help you understand and improve your sleep.22

Front view of a 45mm Galaxy Watch3 in Mystic Black with sleep score measurement GUI.

HOME WORKOUT

Hit your best, then do it again

Equipped with over 120 home workout programs to choose from, Galaxy Watch3 helps you get your body moving on your time. Pick from your phone and cast to your TV – as you work out, it'll display your heart rate in real time. Use the Ridge Sport Band for even more accurate stats.23, 24, 25, 26, 27

Woman in plank position, following a home workout program that is cast from a Galaxy smartphone onto the TV. The 45mm Galaxy Watch3 in Mystic Black is connected to measure her heart rate.

RUNNING ANALYSIS

Improve every stride

Galaxy Watch3's running guide lets you keep pace as you get tips on the go. The advanced algorithm analyzes how you move to help improve your form and prevent injuries. You can even measure VO2 max values and keep up with your daily, weekly, and monthly performance right from your phone.28

Front view of 45mm Galaxy Watch3 in Mystic Black with Running Analysis GUI. It’s next to a Galaxy smartphone showing levels of running asymmetry.

Smartphone-level power is now within reach

AUTO CHAT HISTORY

Keep the conversation going

When you get a new text, Galaxy Watch3 shows your chat history so you can effortlessly follow the conversation. You can also see images without an extra tap, making it even easier to keep the mood going while on a run.29, 30

Messages show the sending and receiving messages. A selfie is received, zooming out to show the 45mm Galaxy Watch3 in Mystic Black with Smart Reply GUI.

SMART REPLY

Add a little context with smart reply

Stay connected with others even on the go – and without fumbling to reply. Galaxy Watch3's smart reply analyzes texts and photos you receive and gives you suggested replies, supporting different categories that include food, celebrations, selfies, and more.31, 32

45mm Galaxy Watch3 in Mystic Black with Smart Reply GUI.

BITMOJI

More fun in your messages

Bitmoji stickers open up fun new ways to communicate. Personalize your Bitmoji to look just like you and use Bitmoji stickers to jazz up the way you talk to family and friends.33, 34, 35, 36, 37

Angled view of 45mm Galaxy Watch3 in Mystic Black and 41mm Galaxy Watch3 in Mystic Bronze. The two show the sending and receiving of Bitmoji emojis through the Message app.

SPOTIFY

The beat goes on and on

Your music doesn't stop as you go from one device to another. Play Spotify on your Galaxy Note20, then open it with the Spotify app icon on your watch face to easily switch songs from your Galaxy Watch3. Or you can even touch and hold Galaxy Buds Live to get lost in the music.38, 39, 40, 41

spotify
Front view of 45mm Galaxy Watch3 in Mystic Black next to a Galaxy smartphone and Galaxy Buds Live. The watch and smartphone display the same Spotify GUI, showing how you can play music on Galaxy Buds Live and seamlessly control it through Galaxy Watch3.

WATCH APPS

Team up with other apps

Put together a team of Galaxy Apps to join you and your phone in your day-to-day. Find your phone and see your phone's photos from your watch, or switch between devices to control your music and check reminders. The perfect partners are all on your wrist.42

  • 45mm Galaxy Watch3 in Mystic Black is connected to a Galaxy smartphone showing Find my phone GUI.
  • 45mm Galaxy Watch3 in Mystic Black is connected to a Galaxy smartphone showing Gallery GUI.
  • 45mm Galaxy Watch3 in Mystic Black is connected to a Galaxy smartphone showing Reminder GUI.
Previous slide Next slide

LTE

Leave your phone at home

Go out for new experiences without the weight of your phone. You can still call, stream, and check your steps — all from your watch. Disconnect from your phone, while staying connected with life.43

Front view of 45mm Galaxy Watch3 in Mystic Black with LTE function GUIs to show how you can call, message right from your watch.

A powerful experience enhanced with Galaxy favorites

  • 5ATM / IP68 A water and dust rating that shows Galaxy Watch3 can handle a little water or dirt.44, 45
  • Military-grade durability You're ready for extreme weather and temperatures with durability made for an active lifestyle.46
  • GPS Know your location and handle detours with ease, together with a built-in barometer sensor.47

WHAT'S IN THE BOX

Ready for action right out of the box

A flat lay of the items included in box with Galaxy Watch3. The packaging, device, and charger with charging dock.

GALAXY ECO SYSTEM

More ways to power up your work and play

Simply connect Galaxy Watch3 to your compatible Galaxy devices through your Samsung Cloud account. As you go to work or workout, it's quick and easy to go from watch to Galaxy Note20, or from watch to Galaxy Buds Live via Bluetooth.48

Front view of Galaxy Watch3 next to Galaxy Buds Live and rear view of Galaxy Note20.

COMPATIBILITY

Gets along with other devices

Galaxy Watch3 is compatible and can easily connect with a range of Galaxy and non-Galaxy devices.

  • *Compatible with Android 5.0 (L OS) or higher, RAM 1.5GB above.
  • *Compatible with iPhone 5 and above, iOS 9.0 or above.
  • *Compatible smartphones and available features may vary by region, carrier and device.
  • *Activation feature for Mobile Network of Galaxy Watch3 with non-Samsung smartphones may not be available in some countries.
A line drawing showing a front-facing Galaxy Watch3 next to a smartphone, demonstrating its compatibility with different devices.
  • *Compatible with Android 5.0 (L OS) or higher, RAM 1.5GB above.
  • *Compatible with iPhone 5 and above, iOS 9.0 or above.
  • *Compatible smartphones and available features may vary by region, carrier and device.
  • *Activation feature for Mobile Network of Galaxy Watch3 with non-Samsung smartphones may not be available in some countries.
  1. Availability of colors, sizes, and models may vary by country or region.
  2. Available strap models may vary country.
  3. Image simulated for illustrative purposes.
  4. UI is subject to change.
  5. Availability of colors and sizes may vary by country or region.
  6. Figures compare the Galaxy Watch3 45mm Stainless Steel and Galaxy Watch 46mm Stainless Steel models. There may be differences in measurements based on the position measured.
  7. To ensure accuracy, users should calibrate their device at least once every four weeks.
  8. Users should measure their blood pressure when at rest, as they would do with a traditional cuff, and refrain from measuring when they are working out, smoking, or drinking.
  9. Availability may vary by market. (Currently available in Korea. Will be available in the USA and other countries after obtaining regulatory clearance/approval/grant.)
  10. Measured blood pressure history can be reviewed within the Samsung Health Monitor app on a paired smartphone.
  11. Requires Galaxy smartphone, running Android 7.0 OS or above, and Galaxy Watch Active2 or upcoming Galaxy Watch device(s) to be paired.
  12. Requires Galaxy smartphone, running Android 7.0 OS or above, and Galaxy Watch Active2 or upcoming Galaxy Watch device(s) to be paired.
  13. THE ECG RECORDING OR SAMSUNG HEALTH MONITOR APP IS NOT INTENDED TO DETECT A HEART ATTACK. IT IS NOT INTENDED TO REPLACE TRADITIONAL METHODS OF DIAGNOSIS OR TREATMENT.
  14. Availability may vary by market. (Currently available in Korea. Will be available in the USA and other countries after obtaining regulatory clearance/approval/grant.)
  15. Feature not supported in Japan, Angola, South Africa, Thailand, Iran, Libya, France, Algeria, and Brazil.
  16. Availability may vary by country or region.
  17. SpO2 is defined as saturation of percutaneous oxygen. Normal levels in humans are measured at approximately 95-100%. Factors like vigorous exercise, the amount of oxygen in the air, your elevation, and various health conditions can all result in lower readings.
  18. Galaxy Watch3 can initiate Emergency call and message if you take a hard fall and don't seem to move.
  19. Galaxy Watch3 cannot detect all falls.
  20. The more physically active you are, the more likely you are to trigger Fall Detection due to high impact activity that can appear to be a fall.
  21. Sending SOS calls and messages requires network connection and smartphone pairing.
  22. Sleep management functions (REM cycles, deep sleep, and total sleep time) on the watch can be used as standalone, but smartphone pairing is recommended in order to see sleep score. Insight only available on paired smartphone.
  23. Fitness tracking on the watch can be used as standalone, but data stored in the watch may only be partially displayed after a certain period of time. Smartphone pairing is recommended in order to keep all data stored.
  24. Intended for general wellness and fitness purposes only.
  25. Feature requires Samsung SmartThings app and Bluetooth connection.
  26. Smartphone, TV, and Ridge Sport Band sold separately. Availability may vary by country or region.
  27. Workout program availability may differ by country or region.
  28. Detailed chart only available on paired smartphone.
  29. Supported messaging apps may vary by country or region.
  30. Wi-Fi/LTE connection is required on Galaxy Watch3 and feature requires pairing with smartphone.
  31. Feature supports nine languages: Korean, English, German, Spanish, Italian, French, Russian, Ukrainian, and Polish.
  32. Wi-Fi/LTE connection is required on Galaxy Watch3 and feature requires pairing with smartphone.
  33. Bitmoji is a trademark of Snap Inc.
  34. Sending Bitmoji stickers requires Bitmoji app version 10.84 or later.
  35. Bitmoji feature is only supported on the Message app.
  36. Service availability may vary by country or region.
  37. Wi-Fi/LTE connection is required on Galaxy Watch3 and feature requires pairing with smartphone.
  38. Must be logged into Spotify. Subscription required.
  39. Availability of Spotify service may vary by country.
  40. Spotify is only supported on devices running version 8.5.56 and later. Requires configuring touchpad settings through the Galaxy Wearables app.
  41. Galaxy Note20 and Galaxy Buds Live sold separately. Availability of Galaxy Note20 and Galaxy Buds Live may vary by country or region.
  42. Available apps may vary by carrier or country.
  43. LTE feature only available on LTE models. Availability of LTE model may vary by carrier or country.
  44. Galaxy Watch3 has a water resistance rating of 50 meters under the ISO standard 22810:2010. It is not suitable for diving or high-pressure water activities. If the device or your hands are wet, they must be dried thoroughly prior to handling.
  45. IP68 is based on test conditions for submersion in up to 1.5 meters of freshwater for up to 30 minutes. Not advised for beach use.
  46. US Military Standard Compliant (MIL-STD-810G)
  47. Using GPS may increase battery consumption.
  48. Galaxy Note20 and Galaxy Buds Live sold separately. Availability of Galaxy Note20 and Galaxy Buds Live may vary by country or region.
  • The only smartwatch with precision rotating bezel for app navigation
    CLASSIC AND PREMIUM
  • Bigger display, Yet lighter and slimmer for comfort wear
    DIGNIFIED DESIGN
  • Take your health into your own hands, with your wrist
    BLOOD PRESSURE

Specifications

  • Size (Main Display) 1.4" (34.5mm)
  • Body Weight (g) 53.8 g
  • Bluetooth Version Bluetooth v5.0
  • Sensors Accelerometer,Barometer,Gyro Sensor,Light Sensor,Optical Heart Rate Sensor
  • Storage (GB) 8
  • CPU Speed 1.15GHz
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Support

Find answers the question you have about the product

Product Support See More Content
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User manual & Downloads
  • Safety Guide
    ENGLISH, SIMPLIFIED CHINESE(S.E Asia), THAI, VIETNAMESE
    Download
  • User Manual
    ENGLISH
    Download
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FAQ

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* Key feature may different from Key Spec

* Battery: Typical value tested under Samsung laboratory condition. Typical value is the estimated average value considering the deviation in battery capacity among the battery samples tested under IEC 61960 standard. Rated (minimum) capacity is 330mAh for Galaxy Watch3 45mm, 240mAh for Galaxy Watch3 41mm. Actual battery life may vary depending on network environment, usage patterns, and other factors. Memory: Actual storage available may vary depending on pre-installed software. RAM capacity may vary depending on model, color, and country.

* Availability of colors, sizes, and models may vary by country or region.

* Available strap models may vary country.

* Image simulated for illustrative purposes.

* UI is subject to change.

* Availability of colors and sizes may vary by country or region.

* Figures compare the Galaxy Watch3 45mm Stainless Steel and Galaxy Watch 46mm Stainless Steel models. There may be differences in measurements based on the position measured.

* Availability may vary by country or region.

* SpO2 is defined as saturation of percutaneous oxygen. Normal levels in humans are measured at approximately 95-100%. Factors like vigorous exercise, the amount of oxygen in the air, your elevation, and various health conditions can all result in lower readings.

* Galaxy Watch3 can initiate Emergency call and message if you take a hard fall and don't seem to move.

* Galaxy Watch3 cannot detect all falls.

* The more physically active you are, the more likely you are to trigger Fall Detection due to high impact activity that can appear to be a fall.

* Sending SOS calls and messages requires network connection and smartphone pairing.

* Sleep management functions (REM cycles, deep sleep, and total sleep time) on the watch can be used as standalone, but smartphone pairing is recommended in order to see sleep score. Insight only available on paired smartphone.

* Fitness tracking on the watch can be used as standalone, but data stored in the watch may only be partially displayed after a certain period of time. Smartphone pairing is recommended in order to keep all data stored.

* Intended for general wellness and fitness purposes only.

* Feature requires Samsung SmartThings app and Bluetooth connection.

* Smartphone, TV, and Ridge Sport Band sold separately. Availability may vary by country or region.

* Workout program availability may differ by country or region.

* Detailed chart only available on paired smartphone.

* Supported messaging apps may vary by country or region.

* Wi-Fi/LTE connection is required on Galaxy Watch3 and feature requires pairing with smartphone.

* Feature supports nine languages: Korean, English, German, Spanish, Italian, French, Russian, Ukrainian, and Polish.

* Wi-Fi/LTE connection is required on Galaxy Watch3 and feature requires pairing with smartphone.

* Bitmoji is a trademark of Snap Inc.

* Sending Bitmoji stickers requires Bitmoji app version 10.84 or later.

* Bitmoji feature is only supported on the Message app.

* Service availability may vary by country or region.

* Wi-Fi/LTE connection is required on Galaxy Watch3 and feature requires pairing with smartphone.

* Must be logged into Spotify. Subscription required.

* Availability of Spotify service may vary by country.

* Spotify is only supported on devices running version 8.5.56 and later. Requires configuring touchpad settings through the Galaxy Wearables app.

* Galaxy Note20 and Galaxy Buds Live sold separately. Availability of Galaxy Note20 and Galaxy Buds Live may vary by country or region.

* Available apps may vary by carrier or country.

* LTE feature only available on LTE models. Availability of LTE model may vary by carrier or country.

* Galaxy Watch3 has a water resistance rating of 50 meters under the ISO standard 22810:2010. It is not suitable for diving or high-pressure water activities. If the device or your hands are wet, they must be dried thoroughly prior to handling.

* IP68 is based on test conditions for submersion in up to 1.5 meters of freshwater for up to 30 minutes. Not advised for beach use.

* US Military Standard Compliant (MIL-STD-810G)

* Using GPS may increase battery consumption.

* Galaxy Note20 and Galaxy Buds Live sold separately. Availability of Galaxy Note20 and Galaxy Buds Live may vary by country or region.