Pixel Watch 3 45mm vs Pixel Watch 4 - 45mm
Size, specs & wrist fit compared
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Which one fits you
Both need much the same wrist — roughly 47–64mm across the flat of the wrist. Neither will fit where the other won't, so decide on thickness, weight and features instead.
The Pixel Watch 3 45mm and Pixel Watch 4 - 45mm share a near-identical 45mm case, so wrist presence comes down to thickness, lug-to-lug and weight.
The Pixel Watch 3 45mm is thinner than 70% of the 384 45mm watches we hold thickness for, the Pixel Watch 4 - 45mm than 70% — so both wear flatter than their widths suggest.
The Pixel Watch 3 45mm is 0.3g heavier than the Pixel Watch 4 - 45mm. Both are circular.
Pixel Watch 3 45mm
Pixel Watch 4 - 45mm
Switch or add watches
Pixel Watch 3 45mm
Pixel Watch 4 - 45mm
2D Dimension Schematics
Every case drawn to scale on a shared centre — from above, and in profile against the wrist.
- Google Pixel Watch 3 45mm45mm · 12.3mm thick
- Google Pixel Watch 4 - 45mm45mm · 12.3mm thick
3D preview
Pixel Watch 3 45mm vs 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 4 - 45mm lasts 2.0× as long as the 3 45mm (3 days against 36 hours).
3 45mm4 - 45mm
Battery Saver
36 hours72 hoursSmartwatch
1 day1.6 days
Specifications
The short version
10 key specs| Spec | GooglePixel Watch 3 45mm | GooglePixel Watch 4 - 45mm |
|---|---|---|
| Case Width | 45mm | 45mm |
| Thickness | 12.3mm | 12.3mm |
| Weight | 37g | 36.7g |
| Shape | Circular | Circular |
| Water Resistance | 5 ATM | 5 ATM |
| GPS | Yes | Yes |
| Display type | OLED/AMOLED | OLED/AMOLED |
| Screen size | 1.4 inches | 1.4 inches |
| Battery life | 1 day | 1.6 days |
| Released | 2024 | 2025 |
Every specification
112 specs| Spec | Google Pixel Watch 3 45mm | Google Pixel Watch 4 - 45mm |
|---|---|---|
| Design | ||
| width | 45 | 45 |
| height | 45 | 45 |
| volume | 24.91 cm³ | 24.91 cm³ |
| weight | 37 g | 36.7 g |
| thickness | 12.3 | 12.3 |
| ATM rating | 5 ATM | 5 ATM |
| resolution | 456 x 456 px | 456 x 456 px |
| screen size | 1.4 inches | 1.4 inches |
| Display type | OLED/AMOLED | OLED/AMOLED |
| Has a display | Yes | Yes |
| pixel density | 320 ppi | 320 ppi |
| water resistance | Waterproof | Waterproof |
| Always-On Display | Yes | Yes |
| has a touch screen | Yes | Yes |
| Gorilla Glass version | Gorilla Glass 5 | Gorilla Glass 5 |
| waterproof depth rating | 50 m | 50 m |
| Watch band is replaceable | Yes | Yes |
| Has sapphire glass display | No | No |
| Ingress Protection (IP) rating | IP68 | IP68 |
| has branded damage-resistant glass | Yes | Yes |
| Battery | ||
| charge time | 1.25 hours | 1.25 hours |
| battery life | 1 days | 1.6 days |
| battery power | 420 mAh | 455 mAh |
| has wireless charging | No | 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 | 36 hours | 72 hours |
| Sensors | ||
| has GPS | Yes | Yes |
| has a compass | Yes | Yes |
| Has a barometer | Yes | Yes |
| has a gyroscope | Yes | Yes |
| Has a cadence sensor | Yes | 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 | ||
| RAM | 2GB | 2GB |
| CPU speed | 2 x 1.5 GHz | — |
| release date | 2023-10-04 | 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 | 32GB | 32GB |
| measures VO2 max | Yes | Yes |
| Has notifications | Yes | Yes |
| Has ECG technology | Yes | Yes |
| Locates your phone | Yes | Yes |
| has fall detection | Yes | Yes |
| has voice commands | Yes | Yes |
| Acquires GPS faster | No | No |
| Has vibrating alerts | Yes | Yes |
| shows readiness level | Yes | Yes |
| Can be used to answer calls | Yes | Yes |
| measures resting heart rate | Yes | Yes |
| has irregular heart rate warnings | Yes | Yes |
| has fast/slow heart rate notifications | Yes | Yes |
| Has a built-in camera remote control function | Yes | Yes |
| Connectivity | ||
| has NFC | Yes | Yes |
| SIM cards | 1 eSIM | 1 eSIM |
| Wi-Fi version | Wi-Fi 4 (802.11n) | Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac), Wi-Fi 6 (802.11ax) |
| supports Wi-Fi | Yes | Yes |
| supports Galileo | Yes | Yes |
| Bluetooth version | 5 | 6 |
| has a cellular module | Yes | Yes |
| Is compatible with iOS | No | No |
| Is compatible with Android | Yes | Yes |
| Miscellaneous | ||
| Has passcode | Yes | Yes |
| Is compatible with Windows | No | No |
| Is compatible with Mac OS X | No | No |
| has an external memory slot | No | No |
| has a battery level indicator | Yes | Yes |
| has a socket for a 3.5 mm audio jack | No | No |
| App & Software | ||
| Ad-free | Yes | Yes |
| Free app | 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 | 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 |
| Doesn’t require account | No | No |
| Provides activity reports | Yes | Yes |
| Displays fertile window notifications | Yes | 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 |
| Has multi-sport mode | No | No |
| Tracks calorie intake | Yes | Yes |
| Provides sleep reports | Yes | Yes |
| Detects activities automatically | Yes | Yes |
| Has a stroke counter for swimming | No | No |
Wrist Fit
Google Pixel Watch 3 45mm
Sits best on wrists ~47–64mm wide (≈ 12.6–17.1cm circumference).
Google Pixel Watch 4 - 45mm
Sits best on wrists ~47–64mm wide (≈ 12.6–17.1cm circumference).
Frequently Asked Questions
Is the Google Pixel Watch 3 45mm bigger than the Google Pixel Watch 4 - 45mm?
Both have a 45mm case. Compare their thickness and lug-to-lug above to judge wrist presence.
Which fits a smaller wrist better, the Google Pixel Watch 3 45mm or the Google Pixel Watch 4 - 45mm?
The Google Pixel Watch 3 45mm suits wrists around 47–64mm 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 Google Pixel Watch 3 45mm 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.