The Xiaomi Mi Body Composition Scale 2 is not just a weight measurement device, but a full body composition analyzer with 13 key indicators. It syncs with your smartphone via Bluetooth, saves your measurement history and helps track your fitness or diet progress, but to get the most accurate data, you need to set the device correctly and follow several important rules.
Many users have problems with scales that show the wrong weight, don't sync with the app, or give out strange fat mass values, most often due to improper calibration, non-compliance with measurement conditions, or outdated firmware. In this article, we'll take a step-by-step look at how to avoid errors and use the Mi Body Composition Scale 2 100%.
Package and preparation for first use
In the weight box you will find:
- 📦 Xiaomi Mi Body Composition Scale 2 (white or black)
- 🔋 4 type batteries AAA (It is already installed, but protected by film)
- 📄 Short instructions in several languages (Russian is available)
- 📱 QR-Download code for Mi Fit or Zepp Life
Before first inclusion:
- Remove the protective film from the batteries (it blocks contact).
- Set the scales on a flat, hard surface (tile, laminate, wood), and a carpet or soft floor will distort the readings.
- Download the Mi Fit app (for Android/iOS) or Zepp Life (a new name for the same scales).
⚠️ Note: If the scales are not turned on after the batteries are installed, check the polarity (+/-). The contacts in the compartment are marked, but sometimes the batteries are inserted incorrectly.
Step-by-step configuration through the application
To scales transfer data to the smartphone, they need to be tied to the Xiaomi account:
- Open Mi Fit or Zepp Life and sign up (if you haven’t already).
- Click Profile → Add the device → Libra.
- Select the Mi Body Composition Scale 2 from the list.
- Stand on the scales – a confirmation code (e.g. E123) will appear on the screen.
- Enter this code in the app to complete pairing.
After the binding:
- 👤 Fill out your profile: gender, age, height and goal (weight loss, weight gain, keeping fit) to get your scores right.
- 📅 Enable notifications to receive weighing reminders.
- 🌐 Allow the app to access Bluetooth and Notifications in smartphone settings.
Set the scales on a flat surface |
Remove socks (bare feet for precise impedance)|
Weighing in the morning on an empty stomach |
Do not drink water 30 minutes before the measurement-->
How to weigh yourself: 5 rules for accuracy
Impedance analysis (BIA), which is used by scales, is sensitive to the slightest changes in the body, so for stable results, observe these conditions:
| Parameter | Recommendation | Why is it important? |
|---|---|---|
| Time of day | In the morning, immediately after waking up. | In the evening, weight can vary by 1-2 kg due to food and water. |
| Body condition | On an empty stomach, after the toilet. | Food and fluid in the gastrointestinal tract distort the readings |
| Surface. | Hard floor (tile, laminate) | Soft coatings absorb vibrations needed for analysis |
| Position. | Stand still, don't move, hands at the seams | Movements affect weight distribution and impedance |
If you're measuring body composition (fat, muscle, water), stand on the scales with your bare feet -- the electrodes on the platform should touch the bare skin. Socks or tights will block the signal.
⚠️ Attention: After an intense workout or sauna, wait 2-3 hours before weighing. Profuse sweating changes hydration levels, and the scales may show an inflated percentage of fat.
💡
If the scales show an unstable weight (for example, 70 kg, then 72 kg when remeasuring), try resetting them to the factory settings: press and hold the switch on 10 seconds until the screen blinks.
Decoding indicators: what the numbers in the appendix mean
The Mi Body Composition Scale 2 measures 13 parameters, and here are the most important ones and how to interpret them:
- 📊 Weight is a baseline. Watch the dynamics, not the absolute values.
- 💧 Water percentage (Water%) is normal for men 50-65%, for women 45-60%. Below 45% is a sign of dehydration.
- 🍗 Body Fat Percentage: Optimal 18-24% for men and 25-31% for women, above 30% for men or 35% for women.
- 🦵 Muscle mass - shows the number of muscles per kg. Important for athletes: when losing weight, this indicator should not fall much.
- 🦴 Bone Mass: 2 to 5 percent of your body weight, and a decrease in weight may indicate a calcium deficiency.
Less critical but useful metrics:
- 🔥 Main exchange (BMR) — How many calories your body uses at rest helps you calculate your daily rate.
- 🏋️ Visceral Fat: fat around internal organs, up to 10 units, above 15, risk of diabetes.
- 👴 Metabolic Age: comparing your metabolism to your average age, and if you're above your real age, it's time to get healthy.
Why do scales show different percentages of fat in different applications?
Frequent mistakes and how to fix them
Problem. №1: Libras do not turn on or respond to pressing.
- 🔋 Check the batteries (even if they are new – sometimes you get married).
- 🔄 Reset the scales: Remove the batteries for 30 seconds, then insert back.
- 📱 Make sure your smartphone has Bluetooth enabled and geolocation permission (you need to find devices).
Problem. №2: Data is not synchronized with the application.
- 📲 Update Mi Fit or Zepp Life to the latest version.
- 🔄 Reconnect the scales: remove them from the list of devices in the application and add again.
- 📵 Check if antivirus or power saving mode blocks Bluetooth.
Problem. №3: Libra shows knowingly incorrect weight (for example, 120 kg at real 70 kg).
- ⚖️ Reset the scales to factory settings (hold the 10 seconds button).
- 🧘 Stand on the scale and stand still for 5-10 seconds – sometimes they need calibration.
- 📦 If the error is repeated, the sensors may fail.
💡
If the scales start to “glutch” after updating the firmware, roll back to the previous version through the Mi Fit application (section “Device settings → Software update → Return the old version”).
Advice for Advanced Users
If you use scales for serious health control, these life hacks will help you get even more data:
- 📈 Export data to Google Fit or Apple Health: In Mi Fit settings, enable sync with these services, so you can analyze graphics in other applications (for example, MyFitnessPal or Yazio).
- 👨👩👧👦 Set up multiple profiles: scales recognize up to 16 users automatically (by weight), but for an accurate analysis of body composition, everyone must have a profile in the app.
- 🔧 Update the firmware: go to the Device Profile → Settings → Update every 2-3 months, new versions improve sensor accuracy.
- 📊 Use the Zepp Life web version: zepp.com has advanced reports that are not available in the mobile app.
It's good for athletes to track muscle-fat ratios (MFRs), and if you lose weight faster than fat, you lose muscle, not fat, and you need to increase your protein intake and adjust your workouts.
Comparison with other Xiaomi models
If you’re choosing between the Mi Body Composition Scale 2 and other Xiaomi scales, here are the key differences:
| Model | Number of indicators | precision | Features | Price (2026) |
|---|---|---|---|---|
| Mi Body Composition Scale 2 | 13 | ± 100 g (weight), ± 3% (fat) | Bluetooth 5.0, which recognizes users automatically | ~3 500 ₽ |
| Mi Smart Scale 2 | 10 | ± 100 g (weight), ± 5% (fat) | Without analysis of bone mass and visceral fat | ~2 500 ₽ |
| Xiaomi Smart Scale 3 | 17 | ± 50 g (weight), ± 2% (fat) | Heart rate sensor, protein mass analysis | ~5 000 ₽ |
Mi Body Composition Scale 2 is the best choice for price/quality ratio. They are more accurate than the budget Mi Smart Scale 2, but cheaper than the flagship Smart Scale 3. If you do not need pulse and protein analysis, overpaying for the older model does not make sense.