Samsung · 2020
Galaxy Watch3 wi fi 45mm Size, Dimensions & Wrist Fit
Case Width
45mm
Thickness
11.1mm
Lug-to-Lug
46.2mm
Weight
53.8g
The Galaxy Watch3 wi fi 45mm looks in proportion on wrists of 14.5–20.5 cm (5.7–8.1 in) round, and fills the wrist at 15–17 cm (46.2mm lug to lug).
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Does the Galaxy Watch3 wi fi 45mm fit your wrist?
The 41mm suits wrists of about 13–19 cm round; the 45mm, 14.5–20.5 cm. Both work from 14.5 to 19 cm, where it is a choice between more skin either side (the 41mm) and a case that fills the wrist (the 45mm). Under 14.5 cm only the 41mm's lugs stay on the wrist; over 19 cm the 41mm starts to look small.
| Wrist round (mm left each side) | 41mm | 45mm |
|---|---|---|
| 14 cm / 5.5 in | Sweet spot (1.3mm) | Overhangs (0.5mm over) |
| 15 cm / 5.9 in | Sweet spot (2.9mm) | Bold (1.1mm) |
| 16 cm / 6.3 in | Balanced (4.6mm) | Sweet spot (2.7mm) |
| 17 cm / 6.7 in | Balanced (6.2mm) | Balanced (4.3mm) |
| 18 cm / 7.1 in | Balanced (7.8mm) | Balanced (5.9mm) |
| 19 cm / 7.5 in | Understated (9.4mm) | Balanced (7.5mm) |
| 20 cm / 7.9 in | Understated (11mm) | Balanced (9.2mm) |
Which Galaxy Watch3 size fits you?
41mm
41mm · 11.3mm thick · 48.2g
View this size45mmViewing
45mm · 11.1mm thick · 53.8g
The Galaxy Watch3 wi fi 45mm in short
- The 41mm version is 4mm narrower, 0.2mm thicker and 5.6g lighter.
- At 11.1mm, the 2nd thickest of the 8 Samsung watches 44–46mm across.
Compare the Galaxy Watch3 wi fi 45mm head to head
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Size, fit and battery side by side, against any smartwatch we list.
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Galaxy Watch3 wi fi 45mm battery life
Published runtime
- Battery life2 days
Charges in 2 hours
Where it ranks among Samsung watches
- Everyday use2 days#39 of 64
- Capacity340 mAh#28 of 64
2D Dimension Schematics
- Samsung Galaxy Watch3 wi fi 45mm 45mm × 46.2mm · 11.1mm thick
3D preview
Samsung Galaxy Watch3 wi fi 45mm on a wrist
What size band does the Galaxy Watch3 wi fi 45mm take?
Lug width
22mm
Alternatives to the Galaxy Watch3 wi fi 45mm
Galaxy Watch3 wi fi 45mm — Frequently Asked Questions
Is the Samsung Galaxy Watch3 wi fi 45mm thick for a 45mm watch?
At 11.1mm, thinner than 91% of the 46 smartwatches 45mm across that we track, so it slides under a cuff more easily than most of its size.
Galaxy Watch3 wi fi 45mm specifications
- Battery life
- 2 days
- Display
- 1.4 inches
- Resolution
- 360 x 360 px
- Water rating
- Waterproof
- Glass
- Gorilla Glass DX
- Strap
- 22 mm
- Storage
- 8GB
- Charging
- 2 hours
Show all specificationsSamsung's published specification, for reference · checked September 2026
Design
- width
- 45
- height
- 46.2
- volume
- 23.08 cm³
- weight
- 53.8 g
- thickness
- 11.1
- resolution
- 360 x 360 px
- screen size
- 1.4 inches
- Display type
- OLED/AMOLED
- Has a display
- Yes
- pixel density
- 364 ppi
- width of band
- 22 mm
- water resistance
- Waterproof
- Always-On Display
- Yes
- has a touch screen
- Yes
- Gorilla Glass version
- Gorilla Glass DX
- waterproof depth rating
- 50 m
- Watch band is replaceable
- Yes
- Has sapphire glass display
- No
- Ingress Protection (IP) rating
- IP68
- has branded damage-resistant glass
- Yes
Battery
- charge time
- 2 hours
- battery life
- 2 days
- battery power
- 340 mAh
- has wireless charging
- Yes
- has a removable battery
- No
- Has a solar power battery
- No
- has a rechargeable battery
- Yes
Sensors
- has GPS
- Yes
- has a compass
- Yes
- Has a barometer
- Yes
- has a gyroscope
- Yes
- Has a cadence sensor
- No
- has an accelerometer
- Yes
- Monitors perspiration
- No
- Has a heart rate monitor
- Yes
- Has a temperature sensor
- No
- Monitors blood oxygenation levels
- Yes
Features
- RAM
- 1GB
- CPU speed
- 2 x 1.15 GHz
- release date
- 2020-08-06
- Has a stopwatch
- Yes
- Has smart alarm
- No
- warranty period
- 1 years
- Has call control
- Yes
- Has silent alarm
- Yes
- has HRV tracking
- No
- internal storage
- 8GB
- measures VO2 max
- Yes
- Has notifications
- Yes
- Has ECG technology
- Yes
- Locates your phone
- Yes
- has a front camera
- No
- has fall detection
- Yes
- has voice commands
- Yes
- Acquires GPS faster
- No
- Has vibrating alerts
- Yes
- number of microphones
- 1
- shows readiness level
- No
- Can be used to answer calls
- Yes
- measures resting heart rate
- Yes
- has irregular heart rate warnings
- Yes
- has fast/slow heart rate notifications
- Yes
- Has a built-in camera remote control function
- Yes
Connectivity
- has NFC
- Yes
- Wi-Fi version
- Wi-Fi 4 (802.11n)
- supports ANT+
- No
- supports Wi-Fi
- Yes
- supports Galileo
- Yes
- Bluetooth version
- 5
- has a cellular module
- No
- Is compatible with iOS
- Yes
- Is compatible with Android
- Yes
Miscellaneous
- has aptX
- No
- Has passcode
- Yes
- Has auto pause
- Yes
- Is compatible with Windows
- No
- Is compatible with Mac OS X
- No
- has an external memory slot
- No
- Compatible with smart scales
- Yes
- has a battery level indicator
- Yes
- has a socket for a 3.5 mm audio jack
- No
- Compatible with external heart rate monitors
- Yes
App & Software
- Ad-free
- Yes
- Free app
- Yes
- Tracks BMI
- Yes
- Has coaching
- Yes
- Supports routes
- Yes
- Has achievements
- Yes
- Has goal setting
- Yes
- Has exercise diary
- Yes
- Has weight tracking
- Yes
- Predicts start date
- Yes
- Tracks water intake
- Yes
- Has inactivity alerts
- Yes
- Has period notifications
- Yes
- Has temperature tracking
- No
- Provides activity reports
- Yes
- Counts how many calories you've burned
- Yes
Activity tracking
- Measures pace
- Yes
- Tracks distance
- Yes
- Tracks elevation
- Yes
- Designed for golf
- No
- Tracks your sleep
- Yes
- Tracks steps taken
- Yes
- Designed for diving
- No
- Has a route tracker
- Yes
- Has exercise tagging
- Yes
- Has multi-sport mode
- Yes
- Tracks calorie intake
- Yes
- Provides sleep reports
- Yes
- Detects activities automatically
- Yes
- Has a stroke counter for swimming
- Yes
