Xiaomi Body Composition Scale S400 review

The Xiaomi Body Composition Scale S400 is our best body-composition pick. Around ₱1,000 as of August 20, 2026 buys 25 health indicators and a sensing method that is genuinely better than the category norm, provided you are willing to live in one app.

Dual-frequency sensing is the spec that matters

Nearly every consumer scale estimates body composition by passing a tiny current through your feet and reading the resistance. Almost all of them use a single frequency, which is why their muscle and water figures move around so much.

The S400 uses two frequencies. Different tissues respond differently at different frequencies, so measuring at two gives the scale more to work with when separating muscle from water. Xiaomi publishes a benchmark against a DEXA scan, which is the clinical reference for body composition and something very few scale makers are willing to be measured against.

That is the difference between a scale that reports 25 numbers and one whose 25 numbers mean something. If body composition is why you are buying a scale at all, it is the reason to buy this one.

What the 25 indicators are for

Most people will look at five: weight, BMI, body fat, muscle and water. The rest, including visceral fat, protein and metabolic rate, are for someone with a specific goal or a doctor’s instruction.

The honest framing is that a longer list is not automatically better. It is better if you will act on it. If you will glance at your weight and close the app, a simpler scale serves you just as well for less.

The trade-offs

It reads weight in 0.1kg steps, which is coarser than the 0.05kg on the S200 and the Huawei Scale 3. If tracking a slow half-kilo-a-month change is your main use, the composition scale is the less precise weigher, which surprises people.

It works only with Xiaomi Home. No Apple Health, no Google Fit, no export worth the name. If you already run Xiaomi lights or a purifier that is a non-issue; if you do not, it is a new app and account for a bathroom scale.

Body-fat sensing is not advised with a pacemaker or another implanted electronic device, or during pregnancy. It still weighs safely.

Is the Xiaomi Scale S400 sulit?

Yes, and it is the clearest value in the category. Dual-frequency sensing with a published DEXA benchmark normally sits well above this price, and the S400 asks about what a plain smart scale costs.

The 180-day battery on three AAA cells helps too: replaceable rather than sealed, and about two changes a year on daily use.

Who the Xiaomi Scale S400 suits

Buy this if body composition is the actual reason you want a scale, you will open the app, and you are comfortable with Xiaomi Home. It is the best measurement per peso here.

Skip it if you want the finest weight reading, if you need your data in Apple Health or Fitbit, or if nobody in the house will read past the weight. See our best body scales roundup and the body scale buying guide.

If the Xiaomi Scale S400 is not right

The Xiaomi Smart Scale S200 is the same price and the sharper weigher, if composition is not your goal. The eufy Smart Scale A1 measures fewer indicators but syncs to Apple Health, Google Fit and Fitbit rather than locking you into one app.