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Amazfit Bip U — case dimensions and design

Amazfit · 2020

Bip U Size, Dimensions & Wrist Fit

Case Width

35.5mm

Thickness

11.4mm

Lug-to-Lug

40.9mm

Weight

31g

The Bip U looks in proportion on wrists of 13–18 cm (5.1–7.1 in) round, and fills the wrist at 13.5–15 cm (40.9mm lug to lug).

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Does the Bip U fit your wrist?

Wrist round (mm left each side)35.5mm
14 cm / 5.5 inSweet spot (2.1mm)
15 cm / 5.9 inBalanced (3.7mm)
16 cm / 6.3 inBalanced (5.4mm)
17 cm / 6.7 inBalanced (7mm)
18 cm / 7.1 inBalanced (8.6mm)
19 cm / 7.5 inUnderstated (10.2mm)
20 cm / 7.9 inUnderstated (11.8mm)

How the fit model works · Size chart for every wrist

The Bip U in short

  • Rated for 9 days of use per charge.
  • Water rated to 50 m.
  • 31g on the wrist.
  • 1.43 inches LCD display.
  • Takes 20mm bands, so third-party straps fit without an adapter.

Compare with another watch

Size, fit and battery side by side, against any smartwatch we list.

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Bip U battery life

Published runtime

  • Battery life9 days
Charges in 2 hours

Where it ranks among Amazfit watches

  • Everyday use9 days#41 of 54
  • Capacity225 mAh#41 of 52
See all 54 Amazfit watches ranked by battery life

2D Dimension Schematics

Top view
Side view
  • Amazfit Bip U 35.5mm × 40.9mm · 11.4mm thick

3D preview

Amazfit Bip U on a wrist

Open 3D try-on

What size band does the Bip U take?

Lug width

20mm

Standard spring-bar lugs: any 20mm strap with quick-release pins fits, Amazfit's or anyone else's.

Bip U specifications

Battery life
9 days
Display
1.43 inches
Resolution
302 x 320 px
Water rating
5 ATM
Strap
20 mm
Charging
2 hours
Show all specificationsAmazfit's published specification, for reference · checked September 2026

Design

width
35.5
height
40.9
volume
16.55 cm³
weight
31 g
thickness
11.4
ATM rating
5 ATM
resolution
302 x 320 px
screen size
1.43 inches
Display type
LCD
Has a display
Yes
pixel density
308 ppi
width of band
20 mm
water resistance
Waterproof
Always-On Display
No
has a touch screen
Yes
waterproof depth rating
50 m
Watch band is replaceable
Yes
Has sapphire glass display
No
has branded damage-resistant glass
No

Battery

charge time
2 hours
battery life
9 days
battery power
225 mAh
has wireless charging
No
has a removable battery
No
Has a solar power battery
No
has a rechargeable battery
Yes

Sensors

has GPS
No
has a compass
No
Has a barometer
No
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

release date
2020-10-16
Has a stopwatch
Yes
Has smart alarm
No
warranty period
1 years
Has call control
Yes
Has silent alarm
No
has HRV tracking
No
measures VO2 max
No
Has notifications
Yes
Has ECG technology
No
Locates your phone
Yes
has a front camera
No
has fall detection
No
has voice commands
Yes
Acquires GPS faster
No
Has vibrating alerts
Yes
number of microphones
0
shows readiness level
No
Can be used to answer calls
No
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
No
supports ANT+
No
supports Wi-Fi
No
supports Galileo
No
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
Includes maps
Yes
Supports routes
Yes
Has achievements
Yes
Has goal setting
Yes
Has live tracking
Yes
Has exercise diary
Yes
Predicts ovulation
Yes
Can be personalised
Yes
Has weight tracking
No
Predicts start date
Yes
Tracks water intake
No
Has inactivity alerts
No
Has period notifications
Yes
Has temperature tracking
No
Provides activity reports
Yes
Displays fertile window notifications
Yes
Counts how many calories you've burned
Yes

Activity tracking

Measures pace
No
Tracks distance
Yes
Tracks elevation
No
Designed for golf
No
Tracks your sleep
Yes
Tracks steps taken
Yes
Designed for diving
No
Has a route tracker
No
Has exercise tagging
Yes
Has multi-sport mode
Yes
Tracks calorie intake
No
Provides sleep reports
Yes
Detects activities automatically
No
Has a stroke counter for swimming
Yes
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