Fitbit · 2024
Ace LTESize, Dimensions & Wrist Fit
Case Width
41.04mm
Thickness
13.35mm
Lug-to-Lug
44.89mm
Weight
28.03g
The Fitbit Ace LTE sits best on flat wrist widths of about 47–64mm (≈ 12.6–17.1cm wrist circumference). Adjust the slider below to check your wrist.
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The Ace LTE in short
The figures that decide whether this watch suits you, pulled out of the full specification sheet further down.
- Rated for 16 days of use per charge.
- Water rated to 5 ATM.
- 28.03g on the wrist. Lighter than 94% of the 41mm watches we have weights for.
- 1.61 inches OLED/AMOLED display, always-on capable.
- Gorilla Glass 3 glass.
Does the Ace LTE fit your wrist?
Drag the slider to your wrist width and see the Ace LTE 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.
Fitbit Ace LTE
Case 41.0mm · Lug-to-lug 44.9mm · Thickness 13.3mm · 28g
Balanced Fit
44.9mm 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 44.9mm, 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 wrist5.1mm spare each side
Comfortable, with visible skin either side.
- Off the wrist13.3mm off the skin
Normal sports-watch height for a wrist this size. (13.3mm case, back against the skin)
- How it seats~3.7mm under the rim
Seats well, with the case back following most of the wrist.
- Weight on the wrist28g
Light enough to forget you have it on. (0.5g per mm of wrist)
Happy with the fit? Check current availability for the Ace LTE.
Check offer2D Dimension Schematics
The Ace LTE drawn to scale — from above, and in profile against the wrist.
- Fitbit Ace LTE41mm × 44.9mm · 13.3mm thick
3D preview
Fitbit Ace LTE 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.
Ace LTE battery life
The runtime the manufacturer publishes for everyday use.
- Smartwatch16 days
How the Ace LTE ranks on battery
No Fitbit in our database is rated for longer everyday (smartwatch) use.
- Everyday use16 days#1 of 10
Top three in the Fitbit range for everyday (smartwatch) use.
Ace LTE specifications
The figures that decide a purchase, followed by every line Fitbit publishes.
- Battery life
- 16 days
- Display
- 1.61 inches
- Water rating
- 5 ATM
- Glass
- Gorilla Glass 3
- Storage
- 32GB
- Charging
- 1.16 hours
Full specification sheet
105 published lines across 8 groups, unedited
Design
- width
- 41.04
- height
- 44.89
- volume
- 24.59 cm³
- weight
- 28.03 g
- thickness
- 13.35
- ATM rating
- 5 ATM
- screen size
- 1.61 inches
- Display type
- OLED/AMOLED
- Has a display
- pixel density
- 333 ppi
- water resistance
- Water resistant
- Always-On Display
- has a touch screen
- is designed for kids
- Gorilla Glass version
- Gorilla Glass 3
- Watch band is replaceable
- Has sapphire glass display
- has branded damage-resistant glass
Battery
- charge time
- 1.16 hours
- battery life
- 16 days
- battery power
- 328 mAh
- has wireless charging
- has a removable battery
- Has a solar power battery
- has a rechargeable battery
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
- RAM
- 2GB
- release date
- 2024-05-29
- Has a stopwatch
- Has smart alarm
- warranty period
- 1 years
- Has call control
- Has silent alarm
- has HRV tracking
- internal storage
- 32GB
- measures VO2 max
- Has notifications
- Has ECG technology
- has a front camera
- has fall detection
- has voice commands
- 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
Connectivity
- has NFC
- SIM cards
- 1 eSIM
- 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 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
- Has achievements
- Has goal setting
- 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
- 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
Compare the Ace LTE head to head
How each one differs in the three measurements you can feel on the wrist. Figures are relative to the Ace LTE.
Garmin
Venu 4 41mm
- Width
- same mm
- Thick
- -1.3mm
- Weight
- +5g
Huawei
Watch GT 6 - 41mm
- Width
- +0.3mm
- Thick
- -3.3mm
- Weight
- +9.5g
Pixel Watch 4 - 41mm
- Width
- same mm
- Thick
- -1mm
- Weight
- +3g
Samsung
Galaxy Watch8 - LTE · 40mm
- Width
- -0.6mm
- Thick
- -4.7mm
- Weight
- +2g
Xiaomi
Redmi Watch 5
- Width
- +0.1mm
- Thick
- -2mm
- Weight
- +5.5g
Alternatives to the Ace LTE
Watches that cover a similar amount of wrist, with the measurements that separate them.
Ace LTE — Frequently Asked Questions
Will the Fitbit Ace LTE fit my wrist?
The Fitbit Ace LTE looks balanced on flat wrist widths of roughly 47–64mm (about 12.6–17.1cm circumference). Drag the slider above to check it against your own measurement.
How long does the Fitbit Ace LTE battery last?
Fitbit rates it at 16 days per charge in everyday use.
How does the Fitbit Ace LTE battery compare with other Fitbit watches?
At 16 days in everyday use it ranks #1 of the 10 Fitbit watches in our database — the longest-rated Fitbit we have data for. The full ranking, including GPS and power-saving figures, is on our Fitbit battery life comparison.
Is the Fitbit Ace LTE thick for a 41mm watch?
At 13.35mm, middle of the pack for thickness at this width. Thickness, not case width, is what decides whether a watch catches on a shirt cuff.
What other watches are the same size as the Fitbit Ace LTE?
TAG Heuer Carrera Chronograph Glass Box 41 Stainless Steel / Black, Zenith Defy Skyline Tourbillon Skeleton Rose Gold / Blue, Garmin Venu 4 41mm, Huawei Watch GT 6 - 41mm all sit within half a millimetre of the Fitbit Ace LTE's 41.04mm case, so they cover the same amount of wrist.
What is the lug-to-lug of the Fitbit Ace LTE?
44.89mm, against a 41.04mm 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.
