Amazfit Active vs Google Pixel Watch 4 - 45mm
Size, specs & wrist fit compared
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Which one fits you
On wrists narrower than about 47mm, the Amazfit Active is the safer pick — it stays proportionate down to roughly 38mm, where the Google Pixel Watch 4 - 45mm starts to hang over the edge. Above 47mm both sit cleanly, and the Google Pixel Watch 4 - 45mm gives you more presence.
The Google Pixel Watch 4 - 45mm wears larger than the Amazfit Active (45mm vs 42.36mm case), giving it more wrist presence — and needing a wider wrist to sit cleanly.
The Amazfit Active is the slimmer of the two (10.75mm vs 12.3mm), so it slides under a cuff more easily.
On the wrist the Amazfit Active feels lighter (27g vs 36.7g, case only).
The Amazfit Active is thinner than 87% of the 42mm watches we track and the Google Pixel Watch 4 - 45mm than 70% of the 45mm ones — so both wear flatter than their widths suggest.
The Google Pixel Watch 4 - 45mm is 2.6mm wider, 9.1mm longer, 1.6mm thicker and 9.7g heavier than the Amazfit Active.
Amazfit
Active
Pixel Watch 4 - 45mm
Switch or add watches
Amazfit
Active
Pixel Watch 4 - 45mm
2D Dimension Schematics
Every case drawn to scale on a shared centre — from above, and in profile against the wrist.
- Amazfit Active42.4mm × 35.9mm · 10.8mm thick
- Google Pixel Watch 4 - 45mm45mm · 12.3mm thick
3D preview
Amazfit Active vs Google Pixel Watch 4 - 45mm 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 Battery Saver mode, where the Amazfit Active lasts 10.0× as long as the Google Pixel Watch 4 - 45mm (30 days against 3 days).
Amazfit ActiveGoogle Pixel Watch 4 - 45mm
Battery Saver
720 hours72 hoursSmartwatch
14 days1.6 daysTraining
240 hours—GPS
16 hours—
Specifications
The short version
11 key specs| Spec | AmazfitActive | GooglePixel Watch 4 - 45mm |
|---|---|---|
| Case Width | 42.36mm | 45mm |
| Lug-to-Lug | 35.9mm | 45mm |
| Thickness | 10.75mm | 12.3mm |
| Weight | 27g | 36.7g |
| Shape | Rectangle | Circular |
| Water Resistance | 5 ATM | 5 ATM |
| GPS | Yes | Yes |
| Display type | OLED/AMOLED | OLED/AMOLED |
| Screen size | 1.75 inches | 1.4 inches |
| Battery life | 14 days | 1.6 days |
| Released | 2023 | 2025 |
Every specification
121 specs| Spec | Amazfit Active | Google Pixel Watch 4 - 45mm |
|---|---|---|
| Design | ||
| width | 42.36 | 45 |
| height | 35.9 | 45 |
| volume | 16.35 cm³ | 24.91 cm³ |
| weight | 27 g | 36.7 g |
| thickness | 10.75 | 12.3 |
| ATM rating | 5 ATM | 5 ATM |
| resolution | 390 x 450 px | 456 x 456 px |
| screen size | 1.75 inches | 1.4 inches |
| Display type | OLED/AMOLED | OLED/AMOLED |
| Has a display | Yes | Yes |
| pixel density | 341 ppi | 320 ppi |
| width of band | 20 mm | — |
| water resistance | Water resistant | Waterproof |
| Always-On Display | Yes | Yes |
| has a touch screen | Yes | Yes |
| is designed for kids | No | — |
| Watch band is replaceable | Yes | Yes |
| Has sapphire glass display | No | No |
| has branded damage-resistant glass | No | Yes |
| Gorilla Glass version | — | Gorilla Glass 5 |
| waterproof depth rating | — | 50 m |
| Ingress Protection (IP) rating | — | IP68 |
| Battery | ||
| charge time | 2 hours | 1.25 hours |
| battery life | 14 days | 1.6 days |
| battery power | 300 mAh | 455 mAh |
| has wireless charging | No | No |
| 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 | 72 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 | Yes |
| 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 | 2025-08-20 |
| Has a stopwatch | Yes | Yes |
| Has smart alarm | No | No |
| warranty period | 1 years | 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 | No |
| 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 | — |
| supports Wi-Fi | No | Yes |
| supports Galileo | No | Yes |
| Bluetooth version | 5.2 | 6 |
| 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), Wi-Fi 5 (802.11ac), Wi-Fi 6 (802.11ax) |
| Miscellaneous | ||
| Has passcode | Yes | Yes |
| 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 | — |
| App & Software | ||
| Ad-free | Yes | Yes |
| Free app | Yes | Yes |
| Tracks BMI | 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 | Yes |
| Has exercise diary | Yes | Yes |
| Predicts ovulation | Yes | 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 | Yes |
| Counts how many calories you've burned | Yes | Yes |
| Doesn’t require account | — | No |
| 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 | No |
| Has multi-sport mode | — | No |
Wrist Fit
Amazfit Active
Sits best on wrists ~38–51mm wide (≈ 10.1–13.6cm circumference).
Google Pixel Watch 4 - 45mm
Sits best on wrists ~47–64mm wide (≈ 12.6–17.1cm circumference).
Frequently Asked Questions
Is the Amazfit Active bigger than the Google Pixel Watch 4 - 45mm?
The Google Pixel Watch 4 - 45mm is bigger — 45mm vs 42.36mm case width.
Which fits a smaller wrist better, the Amazfit Active or the Google Pixel Watch 4 - 45mm?
The Amazfit Active suits wrists around 38–51mm wide, and the Google Pixel Watch 4 - 45mm around 47–64mm. The one with the smaller lower bound is the safer pick for a small wrist.
Can I see the Amazfit Active and Google Pixel Watch 4 - 45mm 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.