Xiaomi Mi Body Composition Scale 2 is no longer just a weight measurement device, it's a full-fledged body composition analyzer that provides 13 key health parameters in seconds. But many users are faced with the problem of how to interpret these numbers correctly? What is the percentage of viscous mass, why is metabolic age higher than real, and why does the scale sometimes show different weights when re-weighing?
In this article, we will take a look at all the metrics that Xiaomi Scale 2 displays, from basic (weight, BMI) to advanced (viscosity level, basal metabolism), you will learn which metrics are critical for health control, how they are calculated, and what to do if the data seems inaccurate, and we will also reveal the hidden possibilities of weights that are not written about in the official instructions – for example, how to use them to track progress in training or why they can show different weights in the morning and evening.
Basic indicators: weight, BMI and percentage of fat
The first three things you'll see on the scale screen and in the Mi Fit app are weight, body mass index (BMI) and fat percentage, and they form the basis for measuring fitness. But how do you interpret them?
Weight is the most obvious indicator, but even here there are nuances. Xiaomi Scale 2 measures weight to 50 g, but the finale value depends on the weighing conditions: time of day, hydration level and even the phase of the menstrual cycle in women. For example, in the evening the weight can be 0.5-1.5 kg more than in the morning - this is normal and is associated with the accumulation of fluid in the body.
Body mass index (BMI) is calculated by weight (kg) / height 2 (m). This is a universal indicator, but it does not take into account muscle mass. Therefore, athletes can have an overweight BMI (excess weight) even though their fat percentage is low. In the Mi Fit app, BMI is displayed with a color indication:
- 🟢 18.5-24.9 - normal
- 🟡 25–29.9 – Overweight
- 🔴 ≥30 - obesity
- 🔵 <18.5 — weightless
Fat percentage is one of the most important indicators, depending on sex and age:
- 👨 Men: 10-20% - excellent, 21-24% - normal, >25% - excess
- 👩 Women: 20–28% – excellent, 29–32% – normal, >33% - excess
Xiaomi Scale 2
bioimpedance analysis
Advanced metrics: muscle mass, bone tissue and water in the body
Beyond the basic data, Xiaomi Scale 2 analyzes body composition at a deeper level, and these metrics are especially useful for athletes, dieters, or health-conscious individuals.
Muscle mass is the weight of all muscles in the body (in kg). Normal is dependent on sex, age and activity level. For example, men aged 20–39 years are normal for 33–39% of total body weight, women are normal for 26–32%. If this is lower than normal, it is worth increasing protein intake and doing strength training. Note that muscle mass can decrease with strict diets, even if the weight is standing still, this is a sign that the body is using muscle, not fat.
Bone mass is a weight of bones in kg. Normally it is 2-3% of total body weight in women and 3-5 % in men. Decrease in this indicator may indicate osteoporosis or lack of calcium. However, Xiaomi Scale 2 does not replace medical diagnosis - to accurately analyze bone density requires densitometry.
Water levels in the body show the percentage of fluid in total weight, the norm for adults is 45-65%, excess can indicate fluid retention (for example, before menstruation or kidney problems), and decrease can indicate dehydration. Interestingly, this indicator directly affects the accuracy of fat measurement: when dehydration, the scales can overestimate the percentage of adipose tissue.
| Indicator. | Normal for men | Norm for women | What to do with deviations |
|---|---|---|---|
| Muscle mass | 33–39% | 26–32% | Increase protein in the diet, engage in strength training |
| Bone mass | 3–5% | 2–3% | Check your vitamin D and calcium levels, consult a doctor |
| Water level | 50–65% | 45–60% | Normalize drinking regimen, reduce salt |
| Viscous mass | 10–15% | 12–18% | Increase physical activity, reduce carbohydrates |
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For maximum accuracy, weigh yourself in the morning on an empty stomach, after using the toilet and without clothes. Repeat the procedure at the same time, so the data will be comparable.
Hidden metrics: viscous mass, protein, and metabolic age
Not all users pay attention to these indicators, but they are equally important for a comprehensive health analysis.
Viscous fat (or “visceral fat”) is fat that surrounds the internal organs, and its excess increases the risk of diabetes, cardiovascular disease and metabolic syndrome, the norm for men is up to 10-12, for women – up to 8-10 (in units set by Xiaomi), if your rate is higher, it is worth reconsidering the diet: reduce sugar, fast carbohydrates and trans fats.
Protein levels are the percentage of protein in the body, 16-20%, and a decrease may indicate insufficient protein intake or problems with digestion (for example, gastrointestinal diseases), which is especially important for vegetarians and people on low-calorie diets.
Metabolic age is an estimate of how your metabolism fits the average for your age, and if it is higher than real, it is a signal of a slow metabolism, which may be due to low muscle mass, hormonal disorders or a sedentary lifestyle.
- 🏋️ Increase muscle mass (strength training 2-3 times a week)
- 🚶 Increase your daily activity levels (10,000 steps)
- 🍗 Increase protein intake to 1.6–2.2 g/kg weight
- 💧 Drink enough water (30–40 ml/kg weight)
Why can metabolic age be overestimated?
Why scales show different data: measurement errors and how to avoid them
Many users complain that the Xiaomi Scale 2 gives unstable results: weight and fat percentage may differ when re-weighing.
The main reasons for errors:
- 💧 Hydration level: after heavy drinking or training, the fat indicator will be underestimated.
- ⏰ Time of day: in the morning the weight is minimal, in the evening - maximum (the difference is up to 1.5 kg).
- 🩴 Clothing and shoes: even lightweight clothing can add 200-500g.
- 🔋 Battery charge: with low charge, the scales can fail.
- 🧘 Position: you need to stand straight, not leaning on one leg.
To minimize errors, follow this algorithm:
☑️ The right weighting on Xiaomi Scale 2
⚠️ Note: If the difference between measurements exceeds 3% when all the rules are met, check the scales on a flat surface (for example, a tile.
How to read data in the Mi Fit application: hidden functions
Not only does Mi Fit store the history of measurements, it also provides tools for deep analysis, and this is what many users miss:
1. Trends and charts. Click on any metric (e.g., "Fat Percentage"), it opens a graph for a month/year. It's easier to track progress. For example, if you're losing weight, but muscle mass is increasing and fat is declining, which is the right dynamic, even if your weight is still standing.
2. Comparison with normal. In Body Composition, the app shows how your metrics relate to your averages for your gender and age. Green zone is normal, red zone is deviation.
3. Data Export: You can upload the story to CSV or sync it to Google Fit/Apple Health, which is convenient for analysis in Excel or for transfer to the doctor.
Set goals: You can set your target weight, percentage of fat or muscle mass in the profile, and the app will track progress and make recommendations.
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The most useful feature of Mi Fit is Body Composition, which shows not only the numbers, but also their dynamics, as well as tips for correction (for example, "Increase protein intake" or "Drink more water").
Comparison with other models: what does Xiaomi Scale 2 and what does not
Xiaomi Mi Body Composition Scale 2 is one of the most popular smart scales due to its price-performance ratio. But how does it differ from other models of the brand and competitors?
| Model | Metrics | precision | Additional functions | Price (2026) |
|---|---|---|---|---|
| Xiaomi Scale 2 | 13 | ±50 g (weight), ±3% (fat) | Synchronization with Mi Fit, multiplayer mode | ~2 500 ₽ |
| Xiaomi Scale 3 | 14 | ± 50 g, ± 2.5 per cent (fat) | Apple Health Support, Improved Electrodes | ~3 200 ₽ |
| Huawei Scale 3 | 11 | ± 50 g, ± 3% (fat) | Huawei Health integration, stress assessment | ~3 000 ₽ |
| Withings Body+ | 16 | ± 100 g, ± 2% (fat) | Pulse measurement, weather sensor, pregnant regime | ~7 000 ₽ |
Xiaomi Scale 2 loses to flagships in the accuracy of measuring fat (an error of ±3% vs. ±2% in the top models), but wins in price. The main advantage is the multiplayer mode: the scales automatically recognize up to 16 users by weight and show data to each of their profile in Mi Fit.
What is missing from Scale 2 is:
- 🩺 Pulse measurements (available in Withings Body)+)
- 🌡️ Stress Level Assessments (Available in Huawei Scale 3)
- 👶 Pregnancy mode (available in Withings)
But for most users, these features are sufficient in the basic model.
FAQ: answers to frequent questions about Xiaomi Scale 2
❓ Why do scales show different weights when weighing again?
❓ Can I use a scale without the Mi Fit app?
❓ How to Lose Scales to Factory Settings?
❓ Why is the percentage of fat higher than on other weights?
❓ Can I weigh myself in socks or with wet feet?
⚠️ Warning: If the scales are no longer synced with the app, check the firmware version. Update Mi Fit to the latest version and reconnect the device via Settings → Devices → Add the device.