Samsung Galaxy Watch 9 vs Samsung Galaxy Watch Ultra 2 Specs Comparison
Galaxy Watch 9 is the better everyday choice for most people, with a lighter design, two case sizes and most of Samsung’s health features. Galaxy Watch Ultra 2 makes more sense if you want much longer battery life, tougher hardware and something better suited to outdoor use.
Key differences
Feature
Samsung Galaxy Watch 9
Samsung Galaxy Watch Ultra 2
Physical size
44 mm: 46.0 x 43.7 x 8.6 mm; 40 mm: 42.7 x 40.4 x 8.6 mm
47.4 x 47.1 x 10.7 mm
Weight
44 mm: 34.0 g; 40 mm: 31.5 g
61.5 g
Material
Armor Aluminum case; sapphire crystal
Titanium case; sapphire crystal
Water resistance
5 ATM; IP68; MIL-STD-810H
10 ATM; IP69K; MIL-STD-810H; EN13319
Display size
44 mm: 1.47 inches (37.3 mm); 40 mm: 1.34 inches (34 mm)
1.5 inches (38.5 mm)
Display resolution
44 mm: 480 x 480 pixels; 40 mm: 438 x 438 pixels
498 x 498 pixels
Display brightness
Up to 3,000 nits
Up to 5,000 nits
Battery life
Up to 40 hours with AOD off; up to 30 hours with AOD on
Up to 80 hours with AOD off; up to 60 hours with AOD on
Full specs comparison
Use the full table below for the complete side-by-side specification breakdown.
| Specification | | |
|---|---|---|
| General | ||
| Release date | 2026-07 | 2026-07 |
| Physical size | 44 mm: 46.0 x 43.7 x 8.6 mm; 40 mm: 42.7 x 40.4 x 8.6 mm | 47.4 x 47.1 x 10.7 mm |
| Weight | 44 mm: 34.0 g; 40 mm: 31.5 g | 61.5 g |
| Material | Armor Aluminum case; sapphire crystal | Titanium case; sapphire crystal |
| Water resistance | 5 ATM; IP68; MIL-STD-810H | 10 ATM; IP69K; MIL-STD-810H; EN13319 |
| Color options | Graphite, Silver, Cream | Titanium Gray, Titanium Silver |
| Display type | Super AMOLED, full-colour Always On Display | Super AMOLED, full-colour Always On Display |
| Display size | 44 mm: 1.47 inches (37.3 mm); 40 mm: 1.34 inches (34 mm) | 1.5 inches (38.5 mm) |
| Display resolution | 44 mm: 480 x 480 pixels; 40 mm: 438 x 438 pixels | 498 x 498 pixels |
| Display brightness | Up to 3,000 nits | Up to 5,000 nits |
| Display protection | Sapphire crystal | Sapphire crystal |
| Battery | Built-in rechargeable battery; 44 mm: 445 mAh; 40 mm: 390 mAh | Built-in rechargeable battery; 800 mAh |
| Battery life | Up to 40 hours with AOD off; up to 30 hours with AOD on | Up to 80 hours with AOD off; up to 60 hours with AOD on |
| Charging | Fast wireless charging | Fast wireless charging |
| Sensors | ||
| GNSS type | Built-in dual-band GNSS | Built-in dual-band GNSS |
| GPS | Yes | Yes |
| GALILEO | Yes | Yes |
| GLONASS | Yes | Yes |
| QZSS | Yes | Yes |
| Beidou | Yes | Yes |
| Accelerometer | Yes | Yes |
| Gyroscope | Yes | Yes |
| Barometric altimeter | Yes | Yes |
| Compass | Yes | Yes |
| Geomagnetic | Yes | Yes |
| Ambient light sensor | Yes | Yes |
| Optical heart rate | Yes | Yes |
| Electrical heart rate | Yes | Yes |
| SpO2 | Yes | Yes |
| Temperature | Yes | Yes |
| Galvanic skin response | Yes | Yes |
| Microphone | Yes | Yes |
| Speakers | Yes | Yes |
| Vibration motor | Yes | Yes |
| Health & activity tracking | ||
| Steps | Yes | Yes |
| Distance | Yes | Yes |
| Calories burned | Yes | Yes |
| Floors | Yes | Yes |
| Sports tracking | Yes | Yes |
| Sleep | Yes | Yes |
| Heart rate | Yes | Yes |
| HRV | Yes | Yes |
| Stress | Yes | Yes |
| Blood oxygen | Yes | Yes |
| Respiration rate | Yes | Yes |
| Skin temperature | Yes | Yes |
| ECG | Yes | Yes |
| Blood pressure | Yes (Samsung Health Monitor; availability varies by market, calibration required) | Yes (Samsung Health Monitor; availability varies by market, calibration required) |
| Body composition | Yes | Yes |
| Glucose | No | No |
| Hydration level | No | No |
| UV exposure | No | No |
| Calorie intake | No | No |
| Hyperglycemia risk assessment | No | No |
| Arterial stiffness detection | No | No |
| Pulse wave arrhythmia analysis | Yes | Yes |
| Daily smart features | ||
| Smartphone compatibility | Android with Google Mobile Services | Android with Google Mobile Services |
| Operating system at launch | Wear OS 7 Powered by Samsung; One UI 9 Watch | Wear OS 7 Powered by Samsung; One UI 9 Watch |
| Processor | Qualcomm Snapdragon Wear Elite / SDW6100 (3 nm, penta-core) | Qualcomm Snapdragon Wear Elite / SDW6100 (3 nm, penta-core) |
| RAM | 2 GB | 2 GB |
| Storage | 32 GB | 64 GB |
| Bluetooth | Yes (6.0) | Yes (6.0) |
| Wi-Fi | Yes (802.11 a/b/g/n, 2.4/5 GHz) | Yes (802.11 a/b/g/n, 2.4/5 GHz) |
| NFC / connected pay | Yes | Yes |
| UWB | No | No |
| Cellular | Optional LTE/eSIM | Yes (LTE/eSIM) |
| Smartphone notifications | Yes | Yes |
| Bluetooth calling | Yes | Yes |
| Smartphone music control | Yes | Yes |
| On-board music storage | Yes | Yes |
| Voice assistant | Google Gemini / Bixby | Google Gemini / Bixby |
| Navigation, safety & special features | ||
| Maps | Yes (Google Maps) | Yes (Google Maps) |
| Offline maps | Yes (Google Maps) | Yes (Google Maps) |
| Navigation | Yes (turn-by-turn navigation) | Yes (turn-by-turn navigation) |
| Emergency SOS | Yes | Yes |
| Satellite SOS | No | No |
| Fall detection | Yes | Yes |
| LED flashlight | No | No |
| Diving | Yes (EN13319; depth and dive metrics to 40 m) | |
| Links | ||
| Affiliate link | Samsung | Samsung |
| Read more | Article | Article |