Samsung Galaxy Watch6 - LTE · 40mm vs Xiaomi Redmi Watch 3 Active
Size, specs & wrist fit compared
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Which one fits you
On wrists narrower than about 49mm, the Samsung Galaxy Watch6 - LTE · 40mm is the safer pick — it stays proportionate down to roughly 43mm, where the Xiaomi Redmi Watch 3 Active starts to hang over the edge. Above 49mm both sit cleanly, and the Xiaomi Redmi Watch 3 Active gives you more presence.
The Samsung Galaxy Watch6 - LTE · 40mm and Xiaomi Redmi Watch 3 Active share a near-identical 38.8mm case, so wrist presence comes down to thickness, lug-to-lug and weight.
The Samsung Galaxy Watch6 - LTE · 40mm is the slimmer of the two (9mm vs 10.9mm), so it slides under a cuff more easily.
On the wrist the Samsung Galaxy Watch6 - LTE · 40mm feels lighter (28.7g vs 42g, case only).
Among the 340 39mm watches we hold thickness for, the Samsung Galaxy Watch6 - LTE · 40mm is thinner than 93%, so it wears flatter than its width suggests.
The Xiaomi Redmi Watch 3 Active is middle-of-the-pack for thickness among the 376 39mm watches in the database.
The Xiaomi Redmi Watch 3 Active is 0.1mm wider, 6.5mm longer, 1.9mm thicker and 13.3g heavier than the Samsung Galaxy Watch6 - LTE · 40mm.
Samsung
Galaxy Watch6 - LTE · 40mm
Xiaomi
Redmi Watch 3 Active
Switch or add watches
Samsung
Galaxy Watch6 - LTE · 40mm
Xiaomi
Redmi Watch 3 Active
2D Dimension Schematics
Every case drawn to scale on a shared centre — from above, and in profile against the wrist.
- Samsung Galaxy Watch6 - LTE · 40mm38.8mm × 40.4mm · 9mm thick
- Xiaomi Redmi Watch 3 Active38.9mm × 46.9mm · 10.9mm thick
3D preview
Samsung Galaxy Watch6 - LTE · 40mm vs Xiaomi Redmi Watch 3 Active on a wrist
Sized to your own wrist, turned any way you like.
Shapes are built from published measurements, not manufacturer 3D models — accurate proportions, generic dial.
Battery life compared
Furthest apart in Smartwatch mode, where the Xiaomi Redmi Watch 3 Active lasts 9.6× as long as the Samsung Galaxy Watch6 - LTE · 40mm (12 days against 30 hours).
Samsung Galaxy Watch6 - LTE · 40mmXiaomi Redmi Watch 3 Active
Smartwatch
1.25 days12 daysBattery Saver
100 hours—
Specifications
The short version
11 key specs| Spec | SamsungGalaxy Watch6 - LTE · 40mm | XiaomiRedmi Watch 3 Active |
|---|---|---|
| Case Width | 38.8mm | 38.9mm |
| Lug-to-Lug | 40.4mm | 46.9mm |
| Thickness | 9mm | 10.9mm |
| Weight | 28.7g | 42g |
| Shape | Circular | Rectangle |
| Water Resistance | 5 ATM | 5 ATM |
| GPS | Yes | No |
| Display type | OLED/AMOLED | LCD, IPS |
| Screen size | 1.3 inches | 1.83 inches |
| Battery life | 1.25 days | 12 days |
| Released | 2023 | 2023 |
Every specification
118 specs| Spec | Samsung Galaxy Watch6 - LTE · 40mm | Xiaomi Redmi Watch 3 Active |
|---|---|---|
| Design | ||
| width | 38.8 | 38.9 |
| height | 40.4 | 46.9 |
| volume | 14.11 cm³ | 19.89 cm³ |
| weight | 28.7 g | 42 g |
| thickness | 9 | 10.9 |
| ATM rating | 5 ATM | 5 ATM |
| resolution | 432 x 432 px | 240 x 280 px |
| screen size | 1.3 inches | 1.83 inches |
| Display type | OLED/AMOLED | LCD, IPS |
| Has a display | Yes | Yes |
| pixel density | 453 ppi | 202 ppi |
| width of band | 20 mm | — |
| water resistance | Waterproof | Sweat resistant |
| Always-On Display | Yes | No |
| has a touch screen | Yes | Yes |
| waterproof depth rating | 50 m | — |
| Watch band is replaceable | Yes | Yes |
| Has sapphire glass display | Yes | No |
| Ingress Protection (IP) rating | IP68 | — |
| has branded damage-resistant glass | No | No |
| is designed for kids | — | No |
| Battery | ||
| charge time | 1.8 hours | — |
| battery life | 1.25 days | 12 days |
| battery power | 300 mAh | 289 mAh |
| has wireless charging | Yes | No |
| has a removable battery | No | No |
| Has a solar power battery | No | No |
| has a rechargeable battery | Yes | Yes |
| battery life in power save mode | 100 hours | — |
| Sensors | ||
| has GPS | Yes | No |
| has a compass | Yes | No |
| Has a barometer | Yes | No |
| has a gyroscope | Yes | No |
| Has a cadence sensor | No | No |
| has an accelerometer | Yes | Yes |
| Monitors perspiration | No | No |
| Has a heart rate monitor | Yes | Yes |
| Has a temperature sensor | Yes | No |
| Monitors blood oxygenation levels | Yes | Yes |
| Features | ||
| RAM | 2GB | — |
| CPU speed | 2 x 1.4 GHz | — |
| release date | 2023-07-26 | 2023-08-01 |
| Has a stopwatch | Yes | Yes |
| Has smart alarm | No | No |
| Has call control | Yes | Yes |
| Has silent alarm | Yes | Yes |
| has HRV tracking | No | — |
| internal storage | 16GB | — |
| measures VO2 max | Yes | — |
| Has notifications | Yes | Yes |
| Has ECG technology | Yes | No |
| Locates your phone | Yes | Yes |
| has fall detection | Yes | No |
| has voice commands | Yes | No |
| Acquires GPS faster | No | No |
| Has vibrating alerts | Yes | Yes |
| number of microphones | 1 | 1 |
| shows readiness level | No | — |
| Can be used to answer calls | Yes | Yes |
| measures resting heart rate | Yes | Yes |
| has irregular heart rate warnings | Yes | No |
| has fast/slow heart rate notifications | Yes | — |
| Has a built-in camera remote control function | Yes | No |
| has a front camera | — | No |
| Connectivity | ||
| has NFC | Yes | No |
| SIM cards | 1 eSIM | — |
| Wi-Fi version | Wi-Fi 4 (802.11n) | — |
| supports ANT+ | No | No |
| supports Wi-Fi | Yes | No |
| supports Galileo | Yes | — |
| Bluetooth version | 5.3 | 5.3 |
| has a cellular module | Yes | No |
| Is compatible with iOS | No | Yes |
| Is compatible with Android | Yes | Yes |
| Miscellaneous | ||
| Has passcode | Yes | No |
| Has auto pause | Yes | — |
| Is compatible with Windows | No | No |
| Is compatible with Mac OS X | No | No |
| has an external memory slot | No | No |
| Compatible with smart scales | Yes | — |
| has a battery level indicator | Yes | Yes |
| has a socket for a 3.5 mm audio jack | No | No |
| Compatible with external heart rate monitors | Yes | Yes |
| App & Software | ||
| Ad-free | Yes | — |
| Free app | Yes | Yes |
| Tracks BMI | Yes | — |
| Has coaching | Yes | Yes |
| Includes maps | Yes | — |
| Supports routes | Yes | Yes |
| Has achievements | Yes | Yes |
| Has goal setting | Yes | Yes |
| Has exercise diary | Yes | Yes |
| Has weight tracking | Yes | Yes |
| Predicts start date | Yes | Yes |
| Tracks water intake | Yes | Yes |
| Has inactivity alerts | Yes | Yes |
| Has period notifications | Yes | Yes |
| Has temperature tracking | Yes | No |
| Provides activity reports | Yes | Yes |
| Counts how many calories you've burned | Yes | Yes |
| Predicts ovulation | — | Yes |
| Can be personalised | — | Yes |
| Doesn’t require account | — | No |
| Displays fertile window notifications | — | Yes |
| Activity tracking | ||
| Measures pace | Yes | No |
| Tracks distance | Yes | No |
| Tracks elevation | Yes | No |
| Designed for golf | No | No |
| Tracks your sleep | Yes | Yes |
| Tracks steps taken | Yes | Yes |
| Designed for diving | No | No |
| Has a route tracker | Yes | Yes |
| Has exercise tagging | Yes | Yes |
| Has multi-sport mode | Yes | No |
| Tracks calorie intake | Yes | Yes |
| Provides sleep reports | Yes | Yes |
| Detects activities automatically | Yes | Yes |
| Has a stroke counter for swimming | Yes | No |
Wrist Fit
Samsung Galaxy Watch6 - LTE · 40mm
Sits best on wrists ~43–58mm wide (≈ 11.5–15.5cm circumference).
Xiaomi Redmi Watch 3 Active
Sits best on wrists ~49–67mm wide (≈ 13.1–17.9cm circumference).
Frequently Asked Questions
Is the Samsung Galaxy Watch6 - LTE · 40mm bigger than the Xiaomi Redmi Watch 3 Active?
The Xiaomi Redmi Watch 3 Active is bigger — 38.9mm vs 38.8mm case width.
Which fits a smaller wrist better, the Samsung Galaxy Watch6 - LTE · 40mm or the Xiaomi Redmi Watch 3 Active?
The Samsung Galaxy Watch6 - LTE · 40mm suits wrists around 43–58mm wide, and the Xiaomi Redmi Watch 3 Active around 49–67mm. The one with the smaller lower bound is the safer pick for a small wrist.
Can I see the Samsung Galaxy Watch6 - LTE · 40mm and Xiaomi Redmi Watch 3 Active side by side at true scale?
Yes — the schematics and photos above show both watches at matched scale, and our fit tool overlays each on your wrist width.