Amazfit Active vs Samsung Galaxy Watch8 - LTE · 40mmSize, Specs & Wrist Fit Compared
The Amazfit Active is 2mm wider, 6.8mm shorter, 2.2mm thicker and 3g lighter than the Samsung Galaxy Watch8 - LTE · 40mm.
Measured against the Amazfit Active.
- Case width
- 42.4mmbaseActive40.4mm−2mmGalaxy Watch8 - LTE · 40mm
- Lug-to-lug
- 35.9mmbaseActive42.7mm+6.8mmGalaxy Watch8 - LTE · 40mm
- Thickness
- 10.8mmbaseActive8.6mm−2.2mmGalaxy Watch8 - LTE · 40mm
- Weight
- 27gbaseActive30g+3gGalaxy Watch8 - LTE · 40mm
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Amazfit
Active
Samsung
Galaxy Watch8 - LTE · 40mm
Which one fits you
On wrists narrower than about 45mm, the Amazfit Active is the safer pick — it stays proportionate down to roughly 38mm, where the Samsung Galaxy Watch8 - LTE · 40mm starts to hang over the edge. Above 45mm both sit cleanly, and the Samsung Galaxy Watch8 - LTE · 40mm gives you more presence.
The Amazfit Active wears larger than the Samsung Galaxy Watch8 - LTE · 40mm (42.36mm vs 40.4mm case), giving it more wrist presence — and needing a wider wrist to sit cleanly.
The Samsung Galaxy Watch8 - LTE · 40mm is the slimmer of the two (8.6mm vs 10.75mm), so it slides under a cuff more easily.
On the wrist the Amazfit Active feels lighter (27g vs 30g, case only).
Among the 723 42mm watches we hold thickness for, the Amazfit Active is thinner than 87%, so it wears flatter than its width suggests.
Among the 509 40mm watches we hold thickness for, the Samsung Galaxy Watch8 - LTE · 40mm is thinner than 83%, so it wears flatter than its width suggests.
Specification Comparison
| Spec | AmazfitActive | SamsungGalaxy Watch8 - LTE · 40mm |
|---|---|---|
| Case Width | 42.36mm | 40.4mm |
| Lug-to-Lug | 35.9mm | 42.7mm |
| Thickness | 10.75mm | 8.6mm |
| Weight | 27g | 30g |
| Shape | Rectangle | Circular |
| Water Resistance | 5 ATM | 5 ATM |
| GPS | Yes | Yes |
| Display type | OLED/AMOLED | OLED/AMOLED |
| Screen size | 1.75 inches | 1.34 inches |
| Always-On Display | Yes | Yes |
| Battery life | 14 days | 2 days |
| Battery power | 300 mAh | 325 mAh |
| Has wireless charging | No | Yes |
| Has a removable battery | No | No |
| Has a solar power battery | No | No |
| Has a rechargeable battery | Yes | Yes |
| Has a battery level indicator | Yes | Yes |
| Released | 2023 | 2025 |
Hover a row to highlight that measurement in the schematics below.
2D Dimension Schematics
Every case drawn to scale on a shared centre — from above, and in profile against the wrist. Built from the measurements, so it works for every watch whether or not it has a photo.
- Amazfit Active42.4mm × 35.9mm · 10.8mm thick
- Samsung Galaxy Watch8 - LTE · 40mm40.4mm × 42.7mm · 8.6mm thick
Amazfit Active vs Samsung Galaxy Watch8 - LTE · 40mm on a wrist
Put Amazfit Active and Samsung Galaxy Watch8 - LTE · 40mm on the same arm, sized to your own wrist, and turn it. Side by side or stacked on one spot, whichever answers the question faster.
- Amazfit Active — 42.4mm case, standing 10.8mm off the wrist.
- Samsung Galaxy Watch8 - LTE · 40mm — 40.4mm case, 42.7mm lug-to-lug, standing 8.6mm off the wrist.
Whether that clears your wrist edges is the question worth answering, and it depends on your wrist rather than on the case diameter.
See them on a wrist in 3DCase shapes are generated from each watch's published measurements — case width, lug-to-lug and thickness — not from manufacturer 3D models, so the proportions are accurate while the dial is generic.
Battery life compared
Furthest apart in Smartwatch mode, where the Amazfit Active lasts 7.0× as long as the Samsung Galaxy Watch8 - LTE · 40mm (14 days against 2 days).
Amazfit ActiveSamsung Galaxy Watch8 - LTE · 40mm
Battery Saver
720 hours—Smartwatch
14 days2 daysTraining
240 hours—GPS
16 hours—
Full Specification Comparison
121 specs| Spec | Amazfit Active | Samsung Galaxy Watch8 - LTE · 40mm |
|---|---|---|
| Design | ||
| width | 42.36 | 40.4 |
| height | 35.9 | 42.7 |
| volume | 16.35 cm³ | 14.84 cm³ |
| weight | 27 g | 30 g |
| thickness | 10.75 | 8.6 |
| ATM rating | 5 ATM | 5 ATM |
| resolution | 390 x 450 px | 438 x 438 px |
| screen size | 1.75 inches | 1.34 inches |
| Display type | OLED/AMOLED | OLED/AMOLED |
| Has a display | Yes | Yes |
| pixel density | 341 ppi | 327 ppi |
| width of band | 20 mm | 20 mm |
| water resistance | Water resistant | Water resistant |
| Always-On Display | Yes | Yes |
| has a touch screen | Yes | Yes |
| is designed for kids | No | No |
| Watch band is replaceable | Yes | Yes |
| Has sapphire glass display | No | Yes |
| has branded damage-resistant glass | No | No |
| waterproof depth rating | — | 50 m |
| maximum operating temperature | — | 35 °C |
| Ingress Protection (IP) rating | — | IP68 |
| lowest potential operating temperature | — | 0 °C |
| Battery | ||
| charge time | 2 hours | — |
| battery life | 14 days | 2 days |
| battery power | 300 mAh | 325 mAh |
| has wireless charging | No | Yes |
| has a removable battery | No | No |
| battery life with GPS on | 16 hours | — |
| Has a solar power battery | No | No |
| has a rechargeable battery | Yes | Yes |
| battery life in training mode | 240 hours | — |
| battery life in power save mode | 720 hours | — |
| Sensors | ||
| has GPS | Yes | Yes |
| has a compass | Yes | Yes |
| Has a barometer | No | Yes |
| has a gyroscope | No | Yes |
| 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 | Yes |
| Monitors blood oxygenation levels | Yes | Yes |
| Features | ||
| release date | 2023-10-27 | 2025-07-09 |
| Has a stopwatch | Yes | Yes |
| Has smart alarm | No | No |
| warranty period | 1 years | — |
| Has call control | Yes | Yes |
| Has silent alarm | Yes | Yes |
| has HRV tracking | Yes | Yes |
| internal storage | 0.25GB | 32GB |
| Has notifications | Yes | Yes |
| Has ECG technology | No | Yes |
| Locates your phone | Yes | Yes |
| has fall detection | No | Yes |
| has voice commands | No | Yes |
| Acquires GPS faster | Yes | Yes |
| Has vibrating alerts | Yes | Yes |
| number of microphones | 1 | — |
| shows readiness level | Yes | Yes |
| Can be used to answer calls | Yes | Yes |
| measures resting heart rate | Yes | Yes |
| has irregular heart rate warnings | No | Yes |
| has fast/slow heart rate notifications | Yes | Yes |
| Has a built-in camera remote control function | No | Yes |
| RAM | — | 2GB |
| measures VO2 max | — | Yes |
| Connectivity | ||
| has NFC | No | Yes |
| supports ANT+ | No | No |
| supports Wi-Fi | No | Yes |
| supports Galileo | No | Yes |
| Bluetooth version | 5.2 | 5.3 |
| has a cellular module | No | Yes |
| Is compatible with iOS | Yes | No |
| Is compatible with Android | Yes | Yes |
| SIM cards | — | 1 eSIM |
| Wi-Fi version | — | Wi-Fi 4 (802.11n) |
| Miscellaneous | ||
| Has passcode | Yes | Yes |
| Has auto pause | Yes | 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 | 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 | Yes |
| Free app | Yes | Yes |
| Tracks BMI | Yes | Yes |
| Has coaching | Yes | Yes |
| Includes maps | Yes | Yes |
| Supports routes | Yes | Yes |
| Has achievements | Yes | Yes |
| Has goal setting | Yes | Yes |
| Has live tracking | Yes | — |
| Has exercise diary | Yes | Yes |
| Predicts ovulation | Yes | — |
| Can be personalised | 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 | Yes |
| Provides activity reports | Yes | Yes |
| Displays fertile window notifications | Yes | — |
| Counts how many calories you've burned | Yes | Yes |
| Activity tracking | ||
| Measures pace | Yes | Yes |
| Tracks distance | Yes | Yes |
| Tracks elevation | Yes | Yes |
| 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 |
| Tracks calorie intake | Yes | Yes |
| Provides sleep reports | Yes | Yes |
| Detects activities automatically | Yes | Yes |
| Has a stroke counter for swimming | Yes | Yes |
| Has multi-sport mode | — | No |
Wrist Fit
Amazfit Active
Sits best on wrists ~38–51mm wide (≈ 10.1–13.6cm circumference).
Samsung Galaxy Watch8 - LTE · 40mm
Sits best on wrists ~45–61mm wide (≈ 12.0–16.3cm circumference).
Frequently Asked Questions
Is the Amazfit Active bigger than the Samsung Galaxy Watch8 - LTE · 40mm?
The Amazfit Active is bigger — 42.36mm vs 40.4mm case width.
Which fits a smaller wrist better, the Amazfit Active or the Samsung Galaxy Watch8 - LTE · 40mm?
The Amazfit Active suits wrists around 38–51mm wide, and the Samsung Galaxy Watch8 - LTE · 40mm around 45–61mm. The one with the smaller lower bound is the safer pick for a small wrist.
Can I see the Amazfit Active and Samsung Galaxy Watch8 - LTE · 40mm 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.