Calibration of the scales Xiaomi Mi Smart: a complete guide with photos and videos

Xiaomi Mi Smart Scale has become an integral part of a healthy lifestyle for millions of users, not only measuring weight, but also analyzing body composition, syncing with fitness apps and helping track progress. However, even the most accurate technique requires periodic adjustment — especially if the readings have begun to “lie” or the scales give an Err error.

Calibration restores measurement accuracy, eliminates system failures and extends the life of the device. In this article, you will find 3 proven methods of calibration (manual, through the Mi Fit app and using test cargo), and learn why Xiaomi scales can lie and how to avoid it. All instructions are relevant for models Mi Smart Scale 2, Xiaomi Body Composition Scale 2 and their counterparts.

⚠️ Important: if your scales show a greater difference in weight ±0.3 kg of reference scales, calibration is required, 80% of the time the problem is solved in 5 minutes without contacting the service.

When do you need to calibrate the scales Xiaomi Mi Smart?

Calibration is not just a “preventive measure” but a necessity for specific symptoms, here are 5 signs that your scales need adjustment:

• 📉 The difference in readings with mechanical weights exceeds ±0.3 kg (weighing up to 100 kg) or ±0.5 kg (weighing over 100 kg).
• ⚠️ Error error appears on the display, LO or --- (even after replacing the batteries).
• 🔄 Indications “jump” when weighed again (for example, 72.1 kg) → 73.5 kg → 71.8 kg for 3 attempts).
• 📱 The data in the Mi Fit application do not match the data on the scale display (the difference is more than 0.5 kg).
• 🔋 After replacing batteries or updating the firmware scales began to lie.

Calibration is also recommended for preventive purposes:

• 🕒 Every 6 months with heavy use (daily weighing).
• 📦 After moving or transporting the scales (even in the original packaging).
• 🔄 After resetting or updating firmware via Mi Fit.

⚠️ Note: if the scale Xiaomi Mi Smart Scale shows weight less than 10 kg or more than 150 kg at your real weight of 50-100 kg, the problem may be in the damaged sensors.

Preparation for calibration: 5 mandatory steps

Before you start setting up, make sure you meet all the conditions for accurate calibration.Neglecting these rules can lead to incorrect results or even damage to the sensors.

Set the scales on a flat solid surface (tiles, laminate, countertop)

Check the battery charge (the display should not burn LO)

Remove dust and moisture from the platform (wipe with a dry napkin)

Weigh yourself with bare feet (socks and slippers distort readings)

Use a reference cargo (for example, a bottle of water 1-1.5 liters with known weight)-->

Let’s look at each item in more detail:

1. Surface. Xiaomi scales are calibrated only on a hard base. Carpet, soft linoleum or uneven floor will lead to an error of up to ± 2 kg. The optimal is a ceramic tiles or a countertop.
2. Batteries: If the indicator shows LO, replace the batteries with new ones (Duracell or Energizer alkaline batteries are recommended).
3. Sensor cleanliness. Dust or moisture on the sensors distorts the signal. Rub the platform with a dry microfibre wipe (don't use alcohol!).
4. Reference load. You'll need an object with an exact known weight to calibrate: 💧 Bottle of water 1 l (= 1 kg at t° 20°C). 📦 weights for sports simulators (2-5 kg). 📚 Book or pack of sugar/flour (weight indicated on package).

⚠️ Note: if you use Xiaomi Mi Smart Scale 3 with the function of measuring body composition (muscle mass, water, bone tissue), you can not use metal weights for calibration - they distort the bioimpedance analysis.

Method 1: Automatic calibration via the Mi Fit app

The easiest and safest method is to use the official Mi Fit app (or Zepp Life for new models), which is suitable for most users and does not require manual adjustments.

Step-by-step:

1. Open the Mi Fit app and go to Profile → Devices → Your scales.
2. Click on the gear icon (⚙️) in the upper right corner and select Calibration of scales (or Accuracy settings in new versions).
3. Follow the instructions on the screen: 📱 The application will ask you to put the scales on a flat surface and wait for stabilization (10-15 seconds). 👣 Then you need to stand on the scales with bare feet and hold the position for 3-5 seconds. ✅ After successful calibration, a notification will appear Ready!.

If the app does not have a calibration option, upgrade to the latest version of the Mi Fit or use an alternative method (see the next section).

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Before calibrating via Mi Fit, disable the VPN and check the scales' connection to Wi-Fi/Bluetooth. An unstable connection may interrupt the process.

Method 2: Manual calibration using test cargo

If automatic calibration didn't work or your scale model doesn't support it, use the manual reference load method, which is universal and works even for informal firmware.

You'll need:

• 📦 Reference cargo (for example, a bottle of water 1 liter) = 1 kg).
• 📝 Paper sheet and pen for the records.
• ⚖️ Mechanical scales for inspection (optional).

Instructions:

1. Place the scales on a flat surface and turn them on (click on the platform or install batteries).
2. Wait for zeros (0.0) to appear on the display.
3. Carefully place the reference load in the center of the platform and write down the readings. For example, if you used a 1 kg bottle and the scale showed 1.05 kg, the error is +0.05 kg.
4. Repeat the weighting 3-5 times and calculate the average error. For example: (1.05 + 1.03 + 1.04 + 1.06) / 4 = 1.045 kg (an error of +0.045 kg)
5. If the error is greater than ±0.2 kg, reset: Hold the on button (or touch the sensor) for 10 seconds until the display appears ---. Wait 1 minute - the scales will automatically recalibrate.

⚠️ Note: if after manual calibration the error remains at the level ±0.3 kg or more, check the scales for mechanical damage, a common cause is sensor deformation due to a fall or overload (for example, if a person weighing on the scale stood up). >150 kg).

Method 3: Calibration through the engineering menu (for advanced)

This method is suitable for advanced users and allows you to fine-tune the sensors, but requires accuracy. Wrong actions can lead to a failure of the scales!

How to enter the engineering menu:

1. Turn on the scales (click on the platform).
2. Hold your finger to the sensor for 10 seconds until the CAL appears on the display.
3. Release your finger - the scales will go into calibration mode (on the screen flashes 0.0).

Next:

• 📦 Place a reference weight on the scale (for example, 5 kg).
• 🔢 Press the sensor with one short press – the current weight of the load (for example, 5.03 kg) will appear on the display).
• 📝 If the actual weight is more than ±0.1 kg, hold the sensor for 5 seconds until it appears SAVE.
• ✅ Remove the load and wait for the automatic exit from the menu (or press the sensor again).

⚠️ Note: in the engineering menu, you can not use a load weighing less than 1 kg or more than 10 kg - this can damage the sensors.

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The engineering menu is not available on all models, and if nothing happens after you hold the sensor, your scales don't support this method.

Typical calibration errors and how to avoid them

Even when following instructions, users often make mistakes that lead to incorrect results or breakages of the scales.

Another common problem is the difference between the weights and the Mi Fit app, which is because:

• 📊 Use of different units of measurement (kg vs lbs).

To resolve the discrepancies, upgrade the Mi Fit app to the latest version and reconnect the scales (Profile → Devices → Forget the device → Connect again).

How to check the accuracy of the scales after calibration?

Calibration done, but how do you make sure the scales are now true? Here are 3 reliable ways to check:

1. Compare it to a reference scale. Weigh it on a mechanical scale (e.g., a health clinic or gym) Write down the result and compare it to the Xiaomi Mi Smart reading. The allowable difference is ±0.2 kg for weights up to 100 kg, ±0.3 kg for weights over 100 kg.
2. Take an object with an exact weight (for example, a pack of sugar 1 kg). Place it on a scale and check the readings. Repeat the test 3 times - the results should match the error of not more than ± 0.1 kg.
3. Stability check. Stand on the scale and record the readings. Go back and weigh again in 10 seconds. If the difference between the measurements is less than 0.1 kg, the scales work correctly.

⚠️ Note: if after calibration the scales are still lying more than on ±0.3 kg, the problem may be in the hardware (damaged sensors, oxidized contacts of batteries).In this case, contact the Xiaomi service center or consider replacing the device.

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Weigh yourself at the same time of day (preferably on an empty stomach in the morning) and in the same clothes (or without it).

FAQ: Frequent questions about Xiaomi Mi Smart weight calibration