Amazfit · 2021
GTR 3 ProSize, Dimensions & Wrist Fit
The Amazfit GTR 3 Pro sits best on flat wrist widths of about 48–66mm (≈ 12.8–17.6cm wrist circumference). Adjust the slider below to check your wrist.
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The GTR 3 Pro in short
The figures that decide whether this watch suits you, pulled out of the full specification sheet further down.
- Between 35 hours and 720 hours per charge depending on the power mode — battery saver at best, gps at worst.
- Water rated to 50 m.
- 32g on the wrist. Lighter than 100% of the 46mm watches we have weights for.
- 1.45 inches OLED/AMOLED display, always-on capable.
- Takes 22mm bands, so third-party straps fit without an adapter.
Does the GTR 3 Pro fit your wrist?
Drag the slider to your wrist width and see the GTR 3 Pro overlaid at true scale. Lug-to-lug — not case diameter — decides whether a watch overhangs your wrist.
Watch Fit Tool
For sports watches, lug-to-lug (L2L) is what matters most — it decides whether a watch overhangs your wrist. Bulky is fine; overhang is not.
Measure at the point where you wear your watch — typically just below the wrist bone.
Flat width — lay your arm on a table, palm facing up, and measure straight across the top of your wrist with a ruler. Bone to bone; do not follow the curve down the sides.
Around — wrap a tape measure snugly round the wrist. No tape? Wrap a strip of paper, mark the overlap and hold the strip against a ruler.
Width ≠ circumference. They are different numbers — around 170mm is about 64mm across — so set the toggle to whichever one you actually measured before you type it in.
Amazfit GTR 3 Pro
Case 46.0mm · Lug-to-lug 46.0mm · Thickness 10.7mm · 32g
Balanced Fit
46mm on a 55mm wrist
Comfortably inside the edges of your wrist, and it seats and sits low enough to wear without thinking about it.
On a 55mm wrist the sweet spot is 47–53mm lug to lug. This one is 46mm, so you could go bigger.
Measure where you wear it, just below the wrist bone. Either of these works — the tool converts between them.
- 1. Flat width — arm flat on a table, palm up. Measure straight across the top of the wrist, bone to bone, ignoring the curve down the sides.
- 2. Around — a tape, or a strip of paper marked and held against a ruler, snug the whole way round.
Leather: Attaches at the lugs, so the case back rests on your skin. Thins and softens with wear. Typical figures, not this model’s own.
Show the measurementsHide the measurements
- Across the wrist4.5mm spare each side
Comfortable, with visible skin either side.
- Off the wrist10.7mm off the skin
Normal sports-watch height for a wrist this size. (10.7mm case, back against the skin)
- How it seats~5.6mm under the rim
Seats well, with the case back following most of the wrist.
- Weight on the wrist32g
Light enough to forget you have it on. (0.6g per mm of wrist)
Happy with the fit? Check current availability for the GTR 3 Pro.
Check offer2D Dimension Schematics
The GTR 3 Pro drawn to scale — from above, and in profile against the wrist.
- Amazfit GTR 3 Pro46mm · 10.7mm thick
3D preview
Amazfit GTR 3 Pro on a wrist
On an arm sized to your own wrist — the view a product photo never gives you.
Shapes are built from published measurements, not manufacturer 3D models — accurate proportions, generic dial.
How long the GTR 3 Pro lasts, by power mode
Runtime changes by a factor of 21 depending on what you leave switched on. Bars are scaled against the longest mode.
- Battery Saver720 hours
- Smartwatch12 days
- Training144 hours
- GPS35 hours
How the GTR 3 Pro ranks on battery
Against the 54 Amazfit watches in our database, ranked on each figure Amazfit publishes.
- Everyday use12 days#30 of 54
- GPS tracking35 hours#10 of 29
- Power save30 days#8 of 25
- Capacity450 mAh#10 of 52
What size band does the GTR 3 Pro take?
Lug width
22mm
Any 22mm strap fits, so you are not restricted to Amazfit's own bands. Quick-release pins let you swap without tools — check that a replacement lists 22mm and quick-release before buying.
Affiliate disclosure: As an Amazon Associate, WatchFitTool earns from qualifying purchases. If you buy through links on this page, we may earn a commission at no extra cost to you. Learn more.
GTR 3 Pro specifications
The figures that decide a purchase, followed by every line Amazfit publishes.
- Battery life
- 12 days
- Display
- 1.45 inches
- Resolution
- 480 x 480 px
- Water rating
- 5 ATM
- Strap
- 22 mm
- Storage
- 2.3GB
- Charging
- 2 hours
Full specification sheet
117 published lines across 8 groups, unedited
Design
- width
- 46
- height
- 46
- volume
- 22.64 cm³
- weight
- 32 g
- thickness
- 10.7
- ATM rating
- 5 ATM
- resolution
- 480 x 480 px
- screen size
- 1.45 inches
- Display type
- OLED/AMOLED
- Has a display
- pixel density
- 331 ppi
- width of band
- 22 mm
- water resistance
- Waterproof
- Always-On Display
- has a touch screen
- waterproof depth rating
- 50 m
- Watch band is replaceable
- Has sapphire glass display
- has branded damage-resistant glass
Battery
- charge time
- 2 hours
- battery life
- 12 days
- battery power
- 450 mAh
- has wireless charging
- has a removable battery
- battery life with GPS on
- 35 hours
- Has a solar power battery
- has a rechargeable battery
- battery life in training mode
- 144 hours
- battery life in power save mode
- 720 hours
Sensors
- has GPS
- has a compass
- Has a barometer
- has a gyroscope
- Has a cadence sensor
- has an accelerometer
- Monitors perspiration
- Has a heart rate monitor
- Has a temperature sensor
- Monitors blood oxygenation levels
Features
- release date
- 2021-10-12
- Has a stopwatch
- Has smart alarm
- warranty period
- 1 years
- Has call control
- Has silent alarm
- has HRV tracking
- internal storage
- 2.3GB
- measures VO2 max
- Has notifications
- Has ECG technology
- Locates your phone
- has a front camera
- has fall detection
- has voice commands
- Acquires GPS faster
- Has vibrating alerts
- number of microphones
- 1
- shows readiness level
- Can be used to answer calls
- measures resting heart rate
- has irregular heart rate warnings
- has fast/slow heart rate notifications
- Has a built-in camera remote control function
Connectivity
- has NFC
- Wi-Fi version
- Wi-Fi 4 (802.11n)
- supports ANT+
- supports Wi-Fi
- supports Galileo
- Bluetooth version
- 5
- has a cellular module
- Is compatible with iOS
- Is compatible with Android
Miscellaneous
- has aptX
- Has passcode
- Has auto pause
- Is compatible with Windows
- Is compatible with Mac OS X
- has an external memory slot
- Compatible with smart scales
- has a battery level indicator
- has a socket for a 3.5 mm audio jack
- Compatible with external heart rate monitors
App & Software
- Ad-free
- Free app
- Tracks BMI
- Has coaching
- Includes maps
- Supports routes
- Has achievements
- Has goal setting
- Has live tracking
- Has exercise diary
- Predicts ovulation
- Can be personalised
- Has weight tracking
- Predicts start date
- Tracks water intake
- Has inactivity alerts
- Has period notifications
- Has temperature tracking
- Provides activity reports
- Displays fertile window notifications
- Counts how many calories you've burned
Activity tracking
- Measures pace
- Tracks distance
- Tracks elevation
- Designed for golf
- Tracks your sleep
- Tracks steps taken
- Designed for diving
- Has a route tracker
- Has exercise tagging
- Has multi-sport mode
- Tracks calorie intake
- Provides sleep reports
- Detects activities automatically
- Has a stroke counter for swimming
Alternatives to the GTR 3 Pro
Watches that cover a similar amount of wrist, with the measurements that separate them.
Amazfit
Balance
- Width
- 46mm
- Thick
- 10.6mm
- Weight
- 35g
Amazfit
GTR 4 Limited Edition
- Width
- 46mm
- Thick
- 11.2mm
- Weight
- 49g
Amazfit
GTR 4
- Width
- 46mm
- Thick
- 10.6mm
- Weight
- 34g
Amazfit
Zepp Z
- Width
- 45.9mm
- Thick
- 10.7mm
- Weight
- 40g
Amazfit
GTR 3
- Width
- 45.8mm
- Thick
- 10.8mm
- Weight
- 32g
Amazfit
Stratos Plus
- Width
- 45.7mm
- Thick
- 12.7mm
- Weight
- 60g
GTR 3 Pro — Frequently Asked Questions
Will the Amazfit GTR 3 Pro fit my wrist?
The Amazfit GTR 3 Pro looks balanced on flat wrist widths of roughly 48–66mm (about 12.8–17.6cm circumference). Drag the slider above to check it against your own measurement.
What size band does the Amazfit GTR 3 Pro take?
22mm. Any 22mm strap fits, so you are not limited to Amazfit's own bands — look for a quick-release fitting if you want to swap without tools.
How long does the Amazfit GTR 3 Pro battery last?
Between 35 hours and 720 hours per charge, depending on the power mode. Amazfit rates Battery Saver at 720 hours and GPS at 35 hours; the chart above lists all 4 modes.
How does the Amazfit GTR 3 Pro battery compare with other Amazfit watches?
At 12 days in everyday use it ranks #30 of the 54 Amazfit watches in our database — below the middle of the range. The full ranking, including GPS and power-saving figures, is on our Amazfit battery life comparison.
Is the Amazfit GTR 3 Pro thick for a 46mm watch?
At 10.7mm, thinner than 96% of 46mm watches, so it slides under a cuff more easily than most of its size. Thickness, not case width, is what decides whether a watch catches on a shirt cuff.
What other watches are the same size as the Amazfit GTR 3 Pro?
Honor Watch 5 Pro - Bluetooth, Huawei Watch GT 6 - 46mm, Samsung Galaxy Watch8 LTE Classic, Garmin Descent™ G2 all sit within half a millimetre of the Amazfit GTR 3 Pro's 46mm case, so they cover the same amount of wrist.
