Xiaomi watches that measure pressure: a complete guide to models and measurement accuracy

Can Xiaomi’s smartwatch replace the tonometer?

Smart watches with blood pressure measurement (BP) is one of the most talked about innovations in recent years. Xiaomi brand did not stay away: several models of their fitness bracelets and smart watches are declared as devices capable of monitoring pressure. But how does it work in practice? Are gadgets for 3-5 thousand rubles to compete with medical blood pressure monitors, which cost 2-3 times more?

In this article, we will discuss:

• 🔍 Which Xiaomi models officially support pressure measurement (and which models don’t, despite advertising);
• 📊 How does the technology work and how accurate are the readings compared to traditional tonometers;
• ⚠️ Why doctors are skeptical of such devices and when using them can be dangerous;
• 🛠️ How to set your watch for maximum accuracy and avoid false readings.

Spoiler: No Xiaomi model for 2026 has a medical device certificate to measure blood pressure, which means readings can only be used to track dynamics, not for diagnosis or treatment.

What Xiaomi models can "measure pressure"? Full list

There are several devices from Xiaomi and its sub-brand Amazfit that are marketed as blood pressure watches, but it’s important to understand that most of them use indirect methods of assessment, rather than direct measurements, as in classical blood pressure monitors.

Here is the current list of models (as of June 2026):

Note that even top-end models like the Xiaomi Watch 2 Pro or Amazfit Balance use an optical PPG sensor that analyzes the pulse wave rather than the blood pressure in the arteries directly.

• 📉 Accuracy depends on proper calibration (an external tonometer is usually required).
• 🚫 Indications may be distorted by movement, low temperature, or poor skin contact.
• ⚠️ The manufacturer always indicates that the data are informational in nature.

How Xiaomi Watches “Measure” Pressure: A Technological Analysis

Unlike traditional blood pressure monitors, which compress the hand with a cuff and measure pressure using the Korotkov method, smart watches use indirect methods — PPG-a sensor (photoplethysmography), which analyzes changes in blood volume in blood vessels from reflected light.

The algorithm of the work:

1. The sensor emits green light that penetrates the skin and reflects off the blood vessels.
2. The frequency of the reflected signal depends on the pulse and the filling of blood vessels.
3. AI algorithms match the data with calibration values (injected manually or obtained from an external tonometer).
4. At the output, the user sees approximate figures of systolic and diastolic pressure.

The problem is, PPG-The sensors were originally designed to measure pulse and oxygen saturation, not pressure:

• 🔄 Regular calibration (minimum once every 2-4 weeks).
• 🧘‍♂️ Complete immobility of the hand during measurement.
• 📱 Modern software with updated algorithms (in old firmware the error is higher).

In China, some Xiaomi models (such as the Mi Watch Color 2) are marketed as “blood pressure monitoring” devices, but in international versions, this feature is often disabled or runs in test mode.

Accuracy of measurements: what the tests and doctors say

Independent tests (including Consumer Reports and Which?) show that the pressure measurement error of smartwatches can reach the limit of the pressure. ±10-15 mm Hg is critical for people with hypertension or hypotension, compared to certified automatic blood pressure monitors (such as Omron or Omron). AND) error does not exceed ±3 mm Hg.

Cardiologists identify several key problems:

⚠️ Note: If your Xiaomi watch pressure is constantly showing “normal" (120/80), But you're feeling headaches, nausea, or weakness -- don't ignore the symptoms. An optical sensor may not detect pressure surges, especially in arrhythmias or vascular spasms.

Results of the comparative test (2026, samples - 50 people of different ages):

Bottom Line: You can use a smartwatch to track trends (like how your blood pressure changes after sleep or exercise), but not to diagnose it. If you're assigned constant blood pressure monitoring, you'd better combine it with a traditional blood pressure monitor.

💡

To reduce the error, measure the pressure on the same hand (usually on the left hand if you are right-handed), at the same time of day and in a calm state. Before measuring, sit for 5 minutes without movement, this will reduce the effect of the pulse on the results.

Step-by-step: how to measure the pressure on the watch Xiaomi

If you do decide to use this feature, follow the algorithm for maximum accuracy. Consider the Xiaomi Watch 2 Pro (the steps are similar for other models):

1. Calibration: Before first use, measure pressure with a mechanical or automatic tonometer and enter the data into the Mi Fitness or Zepp app (depending on the model). → The device → Health settings → Pressure calibration.
2. Arm position: Place the watch on your wrist so that the sensor is snugly attached to your skin, and the hand should be at heart level (e.g., put it on a table).
3. Start measurement: From the watch menu, select Health → Pressure (or Heart Health → Blood Pressure in international firmware). Do not move or talk for 30 to 60 seconds.
4. The result: when you finish, you'll see the numbers on the screen, and compare them to the latest blood pressure readings, if the difference is more than 10 mm Hg, recalibrate.

Remove the wristband or watch from the other hand|Wash and dry the skin (sweat and dirt distort the signal)|Sit in a comfortable position, lean back|Do not drink coffee or alcohol 30 minutes before the measurement|Do not smoke 15 minutes before the procedure-->

Important: Some models (such as the Amazfit GTR 4) require daily calibration in the first 7 days of use.

⚠️ Warning: If the watch shows pressure higher 180/120 mmHg or lower 90/60 But you feel fine -- don't panic and double-check with a blood pressure monitor.

Frequent Mistakes and How to Avoid Them

Users often experience inaccurate readings due to misuse, and here are the most common errors:

• 🚫 Measurement in motion. Even a slight tremor of the hand or walking distorts the signal. PPG-Always measure the pressure at rest.
• 🚫 The watch is loosely fitted, if the strap is too loose, the sensor will not receive enough data, and the optimal is to tighten it so that one finger passes between the skin and the body.
• 🚫 Ignoring calibration. Without regular comparison with the blood pressure monitor, the clock algorithms go into dissipation. Calibrate the device at least once a month.
• 🚫 Measurement after exercise or stress, pulse and vascular tone change, your readings will be overestimated. Wait 20 to 30 minutes.
• 🚫 Use on cold hands. Low temperature constricts the vessels, which prevents the sensor from reading the data correctly.

Another common problem is the difference in readings between hands, which is normal: blood pressure can vary by 5 to 10 mm Hg due to anatomical features. Choose one hand (usually not working) and always use it for measurements.

(1) The density of the sensor to the skin.

2) Firmware version (update via Mi Fitness/Zepp).

(3) Hand temperature (must be room temperature).

4) Battery level (below 20% accuracy drops).-->

What smartwatches measure pressure more accurately?

If you want the most accurate readings among smartwatches, look at models with a medical device certification. Unlike Xiaomi, some brands have undergone clinical trials:

Why are these models more accurate?

• 🔬 Huawei Watch D uses a miniature cuff that slightly compresses the wrist, imitating the work of a traditional tonometer.
• 📊 Samsung Galaxy Watch 6 passed the standard test ISO 81060-2 (medical blood pressure).
• 🩺 Withings BPM Connect was developed with the participation of cardiologists and has recommendations from the European Hypertension Society (ESH).

If the budget allows, it’s best to choose one of these models – especially if you’re looking for a medical level of accuracy.

FAQ: Answers to popular questions