Smart Scales & Body Composition
Smart scales measure more than weight. Bioelectric impedance (BIA) sends a small current through your feet to estimate body fat percentage, lean mass, water, and (on higher-end models) segmental composition — left leg vs right leg, torso vs arms.
The honest framing: home BIA scales are roughly ±3% accurate for body fat, but highly repeatable. Trends matter more than the absolute number.
Showing 5 products
Withings Body Scan Connected Smart Scale
Withings
Smart Scale + 6-lead ECG • Weight, BF%, segmental composition, ECG, vascular age
Best Price
$399.95
Withings Body+ Smart Scale
Withings
Smart Scale • Weight, BF%, water, muscle, bone
Best Price
$99.95
InBody H30 Body Composition Scale
InBody
Direct Segmental Multi-Frequency BIA • BF%, SMM, BMR, segmental analysis
Best Price
$299
Renpho Elis 1 Smart Body Scale
Renpho
Bluetooth Smart Scale • 13 body composition metrics
Best Price
$28
Garmin Index S2 Smart Scale
Garmin
Wi-Fi Smart Scale • Weight, BF%, BMI, water, muscle, bone
Best Price
$149.99
Frequently asked questions
How accurate are home smart scales for body fat percentage?
Most consumer BIA scales are accurate to within ±3-5% body fat compared to a DEXA scan, with newer multi-frequency scales (Withings Body Scan, InBody H30) closer to ±2%. Day-to-day measurements are highly repeatable if you measure at the same time, hydration level, and in similar conditions.
Withings Body Scan vs InBody H30 — which is better?
Withings Body Scan adds a 6-lead ECG and vascular age estimate on top of body comp, syncs with Apple Health and Google Fit, and runs on Wi-Fi. InBody H30 uses direct segmental multi-frequency BIA (the same tech in gym-grade InBody machines) and tends to track closer to clinical reference. Withings wins on ecosystem; InBody wins on raw composition accuracy.
Are these scales safe with a pacemaker or during pregnancy?
No — BIA scales pass a small electrical current through your body. All major manufacturers (Withings, InBody, Renpho, Garmin) advise against use during pregnancy or with a pacemaker or implanted defibrillator. Use a regular weight-only scale instead.
Do I need the $400 scale or will the $30 one work?
For tracking weight and rough body-fat trends over months, a Renpho Elis ($28) does the job. Step up to Withings Body+ ($99) for app polish and multi-user support. Only buy the Body Scan ($399) or InBody H30 ($299) if you care about ECG, vascular age, or segmental data — otherwise the extra money is going to features you will not use.