A correlation coefficient of 0.93 or higher against DEXA, the medical gold standard for body composition measurement, is the specific figure Xiaomi discloses for the Xiaomi Body Fat Scale S400 — a genuine, independently validated accuracy claim rather than a vague marketing statement.
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Xiaomi Body Fat Scale S400: Real DEXA-Validated Accuracy
DEXA, dual-energy X-ray absorptiometry, is the same gold-standard method hospitals and medical institutions genuinely use for body composition testing, and Xiaomi’s own research report specifically confirms a correlation coefficient of 0.93 or above between the S400’s readings and DEXA results.
25 Genuine Health Indicators, Not Just Weight
Weight, BMI, body fat percentage, muscle mass, bone mineral content, visceral fat level, basal metabolic rate and static heart rate are just some of the 25 genuinely distinct metrics tracked, all viewable through the Mi Home/Xiaomi Home app rather than displayed piecemeal on the scale itself.
Full official specifications are on this official Xiaomi Body Composition Scale S400 specifications page.
Browse more in our beauty and health collection, or see everything we carry from Xiaomi.
Xiaomi Body Fat Scale S400: Dual-Frequency Impedance
High and low-frequency alternating currents genuinely penetrate cell membranes differently, allowing the scale to separately measure impedance inside and outside cells — a real technical distinction from basic single-frequency scales that only estimate body fat from one impedance reading.
Who This Suits
It also suits anyone tracking a fitness or weight-loss goal who wants genuinely deeper data than the number on a bathroom scale alone.
This suits anyone wanting genuinely detailed health tracking beyond a simple number on a scale, particularly households monitoring multiple family members’ progress over time. For a scale with a larger integrated display screen showing trend comparisons directly, the Mijia Body Composition Scale S400 Pro in the range adds that feature at a higher price.
Xiaomi Body Fat Scale S400: Family Modes
Small Item Weighing, Baby Holding Mode, Balance Testing and Guest Measurement Mode are all genuinely built into the Mi Home app, covering scenarios well beyond standard adult weigh-ins — a real practical range for a household with children, pets, or frequent guests.
Full Technical Specifications
- Model: Xiaomi Body Composition Scale S400
- Colour: White
- Health Indicators: 25
- Measurement Technology: Dual-frequency bioelectrical impedance
- DEXA Correlation: ≥0.93
- Weight Range: 0.1–150kg
- Precision: 0.1kg
- Heart Rate: Static monitoring
- Modes: Small Item Weighing, Baby Holding, Balance Testing, Guest Measurement
- Display: LED
- Connectivity: Bluetooth, Mi Home/Xiaomi Home app
- Battery Life: Up to 180 days
- Warranty: 1-year warranty from Totot
Full FAQ – Xiaomi Body Fat Scale S400
How accurate is it really compared to actual medical equipment?
Xiaomi’s own testing confirms a correlation of 0.93 or higher against DEXA, the medical gold-standard method.
Can I even weigh a baby or pet on it?
Yes, Baby Holding Mode calculates the baby or pet’s weight separately from the adult holding them.
Does it also track heart rate?
Yes, static heart rate monitoring is included alongside the 25 body composition metrics.
How long does the battery really last?
Up to 180 days according to Xiaomi’s testing, though actual life varies with usage frequency.
Can multiple different family members use it?
Yes, the app supports multiple user profiles alongside a dedicated Guest Measurement Mode.
Is it safe for pregnant women to use?
Bioelectrical impedance scales are generally considered safe, but anyone with specific medical concerns should consult a doctor before relying on the readings.
Does Totot deliver across the UAE?
Yes. We ship nationwide via Aramex for a fixed AED 10, with cash on delivery, Tabby and Tamara available at checkout.
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