What Xiaomi smart scales can do: a full analysis of functions and hidden capabilities

Xiaomi’s smart scales are no longer just a weight measurement device, but today they are full-fledged analytical devices that can assess body composition, track changes and integrate into the smart home ecosystem, but many users use only 20% of their capabilities, unaware of the hidden functions and nuances of the setting.

In this article, we will discuss in detail what modern Xiaomi smart scale models (including Mi Body Composition Scale 2, Smart Scale 2 and Xiaomi Body Fat Scale) really know how to interpret their readings correctly and avoid typical measurement errors.

1. Technical specifications: what is hidden under the body

At first glance, all smart scales look the same, but the internal “stuffing” determines their real capabilities, the main difference between Xiaomi models is the number and type of sensors, as well as data processing algorithms.

Basic models (such as the first generation Mi Smart Scale) are equipped with 4 electrodes for bioimpedance analysis, while flagship versions (Mi Body Composition Scale 2) have 8 contact points, which improves the accuracy of measuring muscle mass and tissue viscosity. It is important to understand that the number of electrodes directly affects the detail of body composition analysis - this is not a marketing move, but a technical feature.

• 🔋 Type of power: all modern models run from 4 batteries AAA (The kit usually comes with alkaline batteries, but some users have successfully used Ni-MH batteries with a voltage of 1.2V - this does not affect accuracy, but requires more frequent recharging.
• 📏 Maximum load: The standard for most models is 150 kg, but the Xiaomi Body Fat Scale Pro can withstand up to 180 kg thanks to a reinforced glass base 6 mm thick.
• 📶 Communication: All scales synced over Bluetooth 5.0, but only Pro models support Wi-Fi to automatically upload data to the cloud without a smartphone.

Interestingly, Xiaomi’s scales use a bioimpedance analysis algorithm licensed from Japan’s Tanita, a world leader in medical measuring equipment, which explains the high accuracy of readings (an error of no more than ±0.1 kg for weight and ±3% for fat mass) when calibrated correctly.

2. Complete list of measured parameters (and what they really mean)

The main advantage of smart scales is not just a number on the display, but a detailed analysis of body composition, but most users do not understand what is behind terms like "viscosity" or "bone mass." Let's go through each parameter in detail.

The visceral fat level, which shows the level of internal fat around the organs, is the only indicator that directly correlates with the risk of type 2 diabetes and cardiovascular disease — a value above 12 is considered critical, while the person may look slim but have high levels of visceral fat.

⚠️ Attention: Bioimpedance test results are hydrated, and if you drink less than 500 ml of water 2 hours before the measurement, your fat and muscle mass percentage will be 5 to 15 percent higher.

3. How to weigh properly: 7 rules for accurate data

Many people complain about the "unstable" readings of smart scales, unaware that 90% of the errors are due to violation of the measurement protocol.

1. Time of day: It is optimal to weigh yourself on an empty stomach in the morning after using the toilet, the difference between morning and evening weight can reach 1-1.5 kg due to the fluid and food consumed.
2. Surface: Libras should stand on a solid flat surface (tile, laminated). A long-pile carpet can distort readings by ±0.3-0.5 kg.
3. Pose: The feet should touch the electrodes with their naked skin (socks distort the bioimpedance analysis). Spread the weight evenly, do not lean on one leg.
4. Hydration: As mentioned earlier, the water level in the body is critical. 2 hours before the measurement, drink 300-500 ml of water.

Few people know, but even the temperature in the room is affected by accuracy, and at temperatures below 18°C, skin resistance increases, which can lower fat percentages by 2 to 3 percent, and this is especially true for bathroom measurements in winter.

Remove socks and shoes |

Stand on the scale with bare feet for 5 seconds to stabilize |

Do not drink coffee or alcohol 12 hours before the measurement|

Use the scales on the same surface-->

4. Synchronize with Mi Fit and other applications

By default, Xiaomi scales work with the proprietary Mi Fit application, but they can be integrated with other services: Google Fit, Apple Health, Yahoo! Health.

• 📱 Mi Fit: Supports all scale models, but only stores 3 months of history in the free version.Mi Premium (299) is required for unlimited access₽/month).
• 🍎 Apple Health: Only synced via Mi Fit as an intermediary.There is no direct scale connection to HealthKit.
• 🤖 Google Fit: Data is transmitted automatically, but without detailing on body composition – only weight and weight IMT.
• 💻 Web version: Health.mi.com provides advanced analytics with graphs and comparisons with WHO standards.

To synchronize with Mi Fit, you need:

1. Install the application and register (you can use Mi Account, Google or Apple ID).
2. Turn on Bluetooth on your smartphone and place it at a distance of no more than 1 meter from the scales.
3. If you stand on the scale, the data will be transmitted automatically. If synchronization does not occur, press the button on the scales (if any) or restart Mi Fit.

⚠️ Note: If you use Xiaomi scales with two accounts (such as a family scale), the data will be duplicated in both profiles. To avoid this, set up guest mode in Mi Fit → Devices → Weight settings → Multiplayer mode.

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To export your measurement history from Mi Fit to Excel, go to Profile → Settings → Data Export. The file will be in CSV format with date and parameter separation.

5. Model comparison: which scales Xiaomi to choose in 2026

More than 10 smart scales from Xiaomi and its sub-brands (Mi, Redmi, Yeelight) are on the market. We selected 4 current models with the best price/function ratio:

If your goal is weight control without unnecessary parameters, Smart Scale 2 is enough. For a deep analysis of body composition (including visceral fat and protein levels), it is better to choose Body Composition Scale 2. The Pro model is justified only if you need automatic synchronization over Wi-Fi (for example, for family use without being tied to a smartphone).

6. Common Problems and Their Solutions

Even the most reliable devices sometimes fail, and here are the typical problems and ways to fix them:

• 🔄 Libras not included: Check the polarity of batteries (the contacts have markings) + and −). If the scales were lying in the cold, let them heat up to room temperature (10-15 minutes). Reset the settings by holding the 10 seconds switch.
• 📵 Not synced to your phone: Make sure your Mi Fit includes Bluetooth and geodata permission (required for Android 10)+). Reconnect the scales: Mi Fit → Profile → Devices → Remove the scales, then add again. If you use an iPhone, check that Mi Fit has Bluetooth access in iOS settings (Settings) → Confidentiality → Bluetooth).
• ⚖️ The readings are very different from mechanical scales: Smart scales show a net weight (without clothes), and mechanical scales show a net weight with clothes. The difference can be as much as 0.5-1 kg. Check the calibration: stand on the scale and hold the reading for 10 seconds - the device will automatically zero out the error.

If the scales show an unrealistically low percentage of fat (for example, 5-8% in a person with a normal build), the most likely problem is dehydration or improper positioning of the legs.

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If the scales show a Lo error after replacing the batteries, it means low charge. Even new batteries can be discharged - try a different kit or use 1.5V batteries.

7 Hidden functions that are not written in the instructions

The manufacturer does not advertise some of the features of Xiaomi scales, but they can be useful:

• 👶 Pregnancy mode: In Mi Fit, you can turn off body composition analysis, leaving only weight. This is relevant for pregnant women, since bioimpedance analysis during this period is inaccurate. → Devices → Weight settings → Pregnancy regimen.
• 📊 Excel data export: The full measurement history can be downloaded via the Mi Fit web version (health.mi.com) CSV table-analysis.
• 🔗 Smart home integration: Xiaomi scales can be linked to Mi Home and set up automation. For example, if you exceed the target weight, a red smart lamp will be turned on.
• 👟 Sports goals: Mi Fit can set a target not only by weight, but also by percentage of fat or muscle mass.

Another little-known fact is that if you put one foot on the scale, it will show the weight of that leg to within ±50 grams, which is useful for recovery from injuries or for detecting asymmetry (e.g., swelling).

8. Alternative firmware and customization

For advanced users, there is the possibility of installing custom firmware on Xiaomi scales.

• Remove the binding to Mi Fit and use open APIs.
• Add support for additional parameters (for example, stress level on the pulse wave).
• Set up automatic data transfer to your own server.

The most popular project is OpenScale (GitHub), which supports most Xiaomi scales.

1. Disassemble the scales and connect to TX/RX contacts via a USB-TTL adapter.
2. Download the firmware from the official repository.
3. Switch through esptool (team: esptool.py) write_flash 0x0 firmware.bin).

⚠️ Note: Custom firmware voids the warranty and may cause irreversible damage to the scales if the process is mistaken. It is recommended to use a backup of the original firmware (esptool.py) read_flash 0x0 0x100000 backup.bin).

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If the scales are no longer synced after firmware is done, check the Bluetooth stack version. MAC-device addresses in settings.

FAQ: Answers to Frequent Questions