Xiaomiβs smart scales are not just a weight measurement device, but a highly accurate gadget that can analyze body composition, fat, muscle mass and even bone density. However, even the most advanced technique requires periodic calibration to keep readings as accurate as possible. Many users face problems: scales show different values when weighing again, data in the Mi Fit application do not match reality, or the device completely refuses to work correctly after moving or changing the coating.
In this article, we will discuss how to properly calibrate Xiaomi scales of different models, from the budget Mi Body Composition Scale to the premium Xiaomi Smart Scale 2. You will learn what tools you need, how to avoid typical errors and what to do if calibration does not help.
Now, let me just say that calibration is not limited to just pressing a button, it's a set of procedures that include surface testing, resetting, sensor testing, and app synchronization, and if you've never calibrated a scale or done it for a long time, chances are that it's showing data with an error of up to 5 to 10 percent -- and it's critical for tracking fitness or medical progress.
1.When Xiaomi scales need calibration: 5 clear signs
Many users have been using smart scales for years without realizing they require customization, and here are the key symptoms that indicate calibration needs:
πΉ Scale: Scales show different weights when weighed again at intervals of 1-2 minutes (e.g. 72.3 kg, then 73.1 kg), this signals sensor failure or improper calibration.
πΉ If you weigh 68.5 kg on a medical scale in a clinic, and Xiaomi stubbornly shows 70.2 kg at home, it's time to sound the alarm. The difference between 1-1.5 kg is already considered critical.
πΉ Synchronization errors: Mi Fit or Zepp Life doesn't take data, it gives you a "Weighting failed" error, or the weight charts look chaotic.
πΉ Failure after moving, scales are sensitive to changes in altitude, humidity, even flooring type, and if you've moved the device to another city or just moved it from the tile to the carpet, you have to calibrate it.
πΉ Suspicious body composition, such as a 3% fat level at 100 kg or a 90% muscle mass, is a clear sign of a bioimpedance sensor failure.
β οΈ Note: If Xiaomi scales flash all the indicators after switching on and do not respond to pressing, this is not always a calibration problem. Most likely, there was a firmware failure or the battery died.
Some users mistakenly believe that calibration is only necessary for new scales, and in fact, even devices that have worked for a year without any complaints can start to βlieβ because of the wear of sensors, changes in temperature in the room or firmware updates.
Preparation for calibration: what to do before the procedure
Calibrating Xiaomiβs scales is not just about pushing buttons, itβs also about preparing correctly, and neglecting those steps can lead to even greater error.
π Choose a flat surface. Ideally, ceramic tiles or laminate. A carpet, a linoleum with a substrate, or a wooden floor can distort the readings due to irregularities. If there is no alternative, put a thin, hard stand under the scales (for example, a sheet of plastic).
π Check the battery. Discharged batteries are one of the main causes of failure. Make sure the charge indicator in the application is at least 30%. For models with replaceable batteries (Mi Body Composition Scale 1), use only alkaline batteries. AAA (chargeless!).
π Update your firmware. Go to the Mi Fit or Zepp Life app, go to Profile. β My devices. β [Your scales] β Software Update: Outdated firmware can block correct calibration.
π Remove foreign objects. Even dust or hair under sensors can distort readings. Wipe the contacts (four metal "legs") with an alcohol napkin.
π Use a check weight. You'll need a known weight object to accurately calibrate it:
- ποΈββοΈ Dumbbell or weight (weight known in advance, for example 5 kg or 10 kg)
- π¦ Bottle of water (1 litre) = 1 kg at room temperature)
- π Book or packaging of cereals (weigh on the kitchen scales in advance)
β οΈ Note: Do not use live organisms (e.g. pets) to calibrate, their weight may change due to movement, which will distort the results.
Set the scales on a flat, hard surface |
Battery charge not lower than 30%|
Update the firmware through Mi Fit|
Clean the sensors of dust|
Prepare a control cargo of known weight-->
3. Step-by-step instruction: how to calibrate Xiaomi scales
The calibration process varies depending on the scale model. Below is a universal instruction that is suitable for most Xiaomi devices, including the Mi Body Composition Scale, Xiaomi Smart Scale 2 and Xiaomi Body Fat Scale.
π§ Step 1. Reset to factory settings
It is recommended to reset before calibration.
- Turn on the scales (click on the platform or power button).
- Hold the button. SET (or the central area of the platform) for 10-15 seconds until all indicators flash.
- Release the button - the scales will reset and return to the factory settings.
π§ Step 2: Entering calibration mode
For most Xiaomi models, the following algorithm is used:
- Turn on the scales and wait for zeros (0.0).
- Press and hold the button. SET (or the central part of the platform) until the symbol appears on the screen "CAL" or "---".
- Release the button and the scales will go into calibration mode.
π§ Step 3: Sizing with reference load
Place a prepared load (e.g. 5 kg weight) on the scales, wait until the weight is recorded on the screen (usually it takes 3-5 seconds), if the readings differ from the real weight of the load by more than by Β±0.2 kg, perform the following steps:
- Take the weight off the scale.
- Press the button. SET Once, the current calibration value will appear on the screen.
- Hold on. SET, Enter the correct weight of the load with a short press (each press increases the value by 0.1 kg).
- Wait 10 seconds β the scales will keep the new settings.
π§ Step 4: Verification of accuracy
Remove the load and wait for the scales to zero. Re-pose the same load - if the readings match the real weight (the error is no more than a few times higher). Β±0.1 kg), the calibration was successful. If not, repeat Step 3.
π§ Step 5: Synchronize with the application
Open Mi Fit or Zepp Life, go to the device section and re-bind the scales:
- Go to Profile. β My devices. β [Your scales] β Untie the device.
- Turn on the scales and hold the phone at a distance of 10-15 cm.
- Follow the instructions on the screen to re-synchronize.
What if the scales are not in calibration mode?
4. Calibration of different Xiaomi models: features and differences
Not all Xiaomi scales are calibrated the same, and the table below shows the key differences for popular models:
| Model | Method of entering calibration mode | Is control cargo required? | Features |
|---|---|---|---|
| Mi Body Composition Scale 1 | Hold the button SET 10 seconds. | Yes (recommended 5-10 kg) | Sensitive to humidity - calibrate in a dry room |
| Xiaomi Smart Scale 2 | Triple push on the platform | No (autocalibration) | Supports calibration through the Mi Fit app |
| Xiaomi Body Fat Scale | Hold the button until you blink "CAL" | Yes (loads from 1 kg) | Recalibration after battery replacement |
| Xiaomi Mi Scale 2 | Through the menu at Mi Fit | No. | Automatic calibration at each switching on |
πΉ Xiaomi Smart Scale 2 and Mi Scale 2 support automatic calibration via the app:
- Open Mi Fit and go to the scale settings.
- Select "Calibration" or "Precision setting".
- Follow the instructions on the screen (usually you need to stand on the scale without shoes).
πΉ For the Mi Body Composition Scale 1 and Xiaomi Body Fat Scale, manual calibration is mandatory, as these models do not have an auto-tuning function. If you ignore this step, the error can reach 15-20% when measuring body composition.
πΉ Xiaomi Mi Body Composition Scale 2 (Model) XMTZC05HM) It requires double calibration, first with the load, then without it.
β οΈ Note: If you have a model with electrode pads (for example, Xiaomi Body Fat Scale), before calibrating, wipe them with alcohol.
5. Typical calibration errors and how to avoid them
Even experienced users sometimes make mistakes that nullify their efforts, and here are the most common mistakes and ways to correct them:
β Use of inappropriate goods
If you take an object with an unknown weight (for example, a bag with things), the error will only increase. Always use cargoes with an exact weight (giri, water bottles with a label).
β Sizing on soft surface
A carpet, bed or sofa will absorb pressure, causing the sensors to work incorrectly, except for models with stabilizer legs (such as the Xiaomi Smart Scale 2), which can be used on carpets.
β Ignoring firmware updates
Outdated software can block calibration mode or cause malfunctions. Always check the firmware in Mi Fit before starting the procedure.
β Calibration in a wet room
Bioimpedance sensors are sensitive to humidity, so if you calibrate the scales in the bathroom right after the shower, the body composition readings are inaccurate, and the optimal humidity is 40-60%.
β Interruption of the process
If you interrupt calibration (e.g., take off the load early or turn off the scale), the settings will reset and you will have to start again, the average calibration time is 2-3 minutes.
β Use of discharged batteries
When the charge is low, the scales can arbitrarily reset or show an error "Err." Always calibrate the device with a charge of at least 50%.
π‘
If the scales are lying after calibration, try to trick the system by putting a weight close to your weight (for example, 70 kg) on them and calibrate it to that load, sometimes helping to stabilize the readings.
6.Calibration through the Mi Fit app: step-by-step guide
Not everyone knows that some Xiaomi models support software calibration through the official app, which is easier to manually and suitable for scales with Bluetooth 5.0 support (for example, Xiaomi Smart Scale 2 or Mi Scale 2).
π± Step 1. Connect the scales to the app
Make sure the scales are linked to your Mi Fit or Zepp Life account. If not, pair:
- Open the app and go to Profile β Add the device.
- Choose your weight model and follow the instructions.
- Stand on the scales β they should automatically synchronize.
π± Step 2. Find the calibration section
Depending on the version of the application, the path may differ:
- In Mi Fit: Profile β My devices. β [Your scales] β Settings β Sizing.
- In Zepp Life: Devices β [Your scales] β Additionally. β Accuracy setting.
π± Step 3: Follow the instructions on the screen
The annex will propose:
- Stand on a scale without shoes (for calibration of bioimpedance sensors).
- Wait 10-15 seconds while the analysis is underway.
- Confirm the retention of new settings.
π± Step 4. Check the results
After calibration, re-weigh the data and compare it to a mechanical scale or a pharmacy scale. If the difference is greater than 0.3 kg, repeat the procedure.
π‘
Software calibration via Mi Fit is only suitable for models with Bluetooth 5.0 support. For older scales (for example, Mi Body Composition Scale 1), only manual tuning is available.
7.What to do if calibration does not help?
If Xiaomi's scales still show the wrong data after all the manipulation, the problem may be deeper.
π§ Check the sensors.
Look at the four metal legs on the underside of the scales.
- πΉ Oxidized - wipe with alcohol.
- πΉ Bent - line gently with tweezers.
- πΉ Contaminated - clean with a cotton swab.
π§ Reset the settings to factory.
Sometimes it helps to completely reset:
- Remove the batteries for 5 minutes.
- Press and hold the button. SET 20 seconds (even without batteries).
- Insert the batteries back and recalibrate.
π§ Check compatibility with your phone
Xiaomi's scales may conflict with some smartphones on Android 10 and below due to legacy Bluetooth versions.Refresh your phone's OS or use another device to sync.
π§ Contact the service center.
If nothing helps, there may be hardware malfunctions:
- πΉ Weight sensor (tensometric sensor) damaged).
- πΉ The control board is out of order.
- πΉ Built-in capacitor is discharged (for models with a battery).
Official Xiaomi service centers in Russia and the CIS perform diagnostics for free, but repairs can cost 1,500-3000 β½ depending on the breakdown.