Amazfit · 2021
GTS 3Size, Dimensions & Wrist Fit
Case Width
36mm
Thickness
8.8mm
Lug-to-Lug
42.4mm
Weight
24.4g
The Amazfit GTS 3 sits best on flat wrist widths of about 45–61mm (≈ 12.0–16.3cm wrist circumference). Adjust the slider below to check your wrist.
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.
The GTS 3 in short
The figures that decide whether this watch suits you, pulled out of the full specification sheet further down.
- Between 20 hours and 480 hours per charge depending on the power mode — battery saver at best, gps at worst.
- Water rated to 50 m.
- 24.4g on the wrist. Lighter than 96% of the 36mm watches we have weights for.
- 1.75 inches OLED/AMOLED display, always-on capable.
- Takes 20mm bands, so third-party straps fit without an adapter.
Does the GTS 3 fit your wrist?
Drag the slider to your wrist width and see the GTS 3 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 GTS 3
Case 42.4mm · Lug-to-lug 42.4mm · Thickness 8.8mm · 24g
Balanced Fit
42.4mm 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 42.4mm, 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 wrist6.3mm spare each side
Comfortable, with visible skin either side.
- Off the wrist8.8mm off the skin
Sits low enough to disappear under a cuff. (8.8mm case, back against the skin)
- How it seats~4.2mm under the rim
Seats well, with the case back following most of the wrist.
- Weight on the wrist24g
Light enough to forget you have it on. (0.4g per mm of wrist)
Happy with the fit? Check current availability for the GTS 3.
Check offer2D Dimension Schematics
The GTS 3 drawn to scale — from above, and in profile against the wrist.
- Amazfit GTS 336mm × 42.4mm · 8.8mm thick
3D preview
Amazfit GTS 3 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 GTS 3 lasts, by power mode
Runtime changes by a factor of 24 depending on what you leave switched on. Bars are scaled against the longest mode.
- Battery Saver480 hours
- Smartwatch12 days
- Training144 hours
- GPS20 hours
How the GTS 3 ranks on battery
Against the 54 Amazfit watches in our database, ranked on each figure Amazfit publishes.
- Everyday use12 days#30 of 54
- GPS tracking20 hours#25 of 29
- Power save20 days#18 of 25
- Capacity250 mAh#36 of 52
What size band does the GTS 3 take?
Lug width
20mm
Any 20mm 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 20mm 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.
GTS 3 specifications
The figures that decide a purchase, followed by every line Amazfit publishes.
- Battery life
- 12 days
- Display
- 1.75 inches
- Resolution
- 390 x 450 px
- Water rating
- 5 ATM
- Strap
- 20 mm
- Charging
- 2 hours
Full specification sheet
115 published lines across 8 groups, unedited
Design
- width
- 36
- height
- 42.4
- volume
- 13.43 cm³
- weight
- 24.4 g
- thickness
- 8.8
- ATM rating
- 5 ATM
- resolution
- 390 x 450 px
- screen size
- 1.75 inches
- Display type
- OLED/AMOLED
- Has a display
- pixel density
- 341 ppi
- width of band
- 20 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
- 250 mAh
- has wireless charging
- has a removable battery
- battery life with GPS on
- 20 hours
- Has a solar power battery
- has a rechargeable battery
- battery life in training mode
- 144 hours
- battery life in power save mode
- 480 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
- 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
- supports ANT+
- supports Wi-Fi
- supports Galileo
- Bluetooth version
- 5.1
- 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 GTS 3
Watches that cover a similar amount of wrist, with the measurements that separate them.
Amazfit
GTS 4
- Width
- 36mm
- Thick
- 9.9mm
- Weight
- 27g
Amazfit
GTS 2 Mini (2022)
- Width
- 35.8mm
- Thick
- 8.95mm
- Weight
- 19.5g
Amazfit
GTS 2 Mini
- Width
- 35.8mm
- Thick
- 8.95mm
- Weight
- 19.5g
Amazfit
GTS
- Width
- 36.25mm
- Thick
- 9.4mm
- Weight
- 24.8g
Amazfit
GTS - global version
- Width
- 36.25mm
- Thick
- 9.4mm
- Weight
- 24.8g
Amazfit
Bip 3 Pro
- Width
- 36.4mm
- Thick
- 9.6mm
- Weight
- 33.2g
GTS 3 — Frequently Asked Questions
Will the Amazfit GTS 3 fit my wrist?
The Amazfit GTS 3 looks balanced on flat wrist widths of roughly 45–61mm (about 12.0–16.3cm circumference). Drag the slider above to check it against your own measurement.
What size band does the Amazfit GTS 3 take?
20mm. Any 20mm 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 GTS 3 battery last?
Between 20 hours and 480 hours per charge, depending on the power mode. Amazfit rates Battery Saver at 480 hours and GPS at 20 hours; the chart above lists all 4 modes.
How does the Amazfit GTS 3 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 GTS 3 thick for a 36mm watch?
At 8.8mm, thinner than 96% of 36mm 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 GTS 3?
Zenith Defy Skyline 36 Stainless Steel - Diamond / Silver, Apple Watch Series 11 - GPS + Cellular · Aluminium · 42mm, TAG Heuer Aquaracer Professional 300 36 Stainless Steel / Blue Gradient - Diamond / Rubber, Tissot Seastar 1000 36 Quartz Stainless Steel - Rose Gold / Black / Bracelet all sit within half a millimetre of the Amazfit GTS 3's 36mm case, so they cover the same amount of wrist.
What is the lug-to-lug of the Amazfit GTS 3?
42.4mm, against a 36mm case width. Lug-to-lug is the measurement that decides overhang: if it exceeds the flat width of your wrist, the lugs sit past the edge no matter how modest the case diameter looks.
