A bathroom scale used to answer one question, and plenty of people still want exactly that. A body composition monitor answers several more by sending a tiny current through the body and estimating how much of your weight is fat, muscle and water, a method called bioelectrical impedance analysis, or BIA. The category now runs from simple glass scales that hand everything to a phone app, to stand-alone monitors that keep your data on the device, to eight-electrode models with a hand grip that read the arms and trunk as well as the legs. We ranked the scales in our health catalog by sensor design, weight capacity and resolution, what the display shows without a phone, how many users they store, and what thousands of owners report after months of weigh-ins.
We have not stepped on every one of these ourselves; the verdicts rest on the spec sheets and the owner review history. Prices are not printed because they change daily; every button opens the live Amazon page. Body composition figures from any home scale are estimates for tracking trends, not medical measurements, so talk to a doctor about anything that worries you. Our separate smart scales guide covers a different set of app-first models, and if you track food as well as weight our kitchen scales guide is the companion.
How we picked
- A stated capacity and resolution. Most picks weigh up to 400 pounds, and the maker lists the increment where it publishes one.
- Clear sensor design. Four foot electrodes for basic estimates, or eight electrodes with a hand grip for arm and trunk readings.
- A choice of app or no app. Stand-alone monitors are included on purpose for people who want privacy and simplicity.
- Multiple users, since most scales live in a shared bathroom.
- Owner feedback from more than a thousand reviews on every pick, with consistency and app complaints noted.
The picks
RENPHO Smart Scale, BMI & Body Fat, Bluetooth, 13 Metrics, White, Elis 1

The Elis 1 is the bathroom scale that set the pattern for the category, and its owner record is the reason it ranks first: well over ten thousand reviews with an excellent owner rating. It is a tempered glass platform with four electrodes and high-precision sensors that weigh up to 400 pounds in 0.2 pound steps, with automatic calibration and automatic on and off. Step on without a phone and it simply shows your weight; open the RENPHO Health app over Bluetooth and it adds 12 more estimates, from body fat to BMI, and passes them to Apple Health, MyFitnessPal or Samsung Health. Profiles are unlimited, and a baby mode weighs an infant or a pet in your arms. The body composition figures come from the feet only, so treat them as trends, and nothing beyond weight appears on the scale itself. As an everyday scale for a household, it is the safe choice.
- Well over ten thousand owner reviews with an excellent owner rating
- Shows weight on the display without a phone nearby
- Unlimited user profiles for a household
- Batteries included; listed as FSA and HSA eligible
- Only weight shows on the scale; other metrics need the app
- Four foot electrodes estimate from the lower body only
- Bluetooth only, so the phone must be nearby to sync
OMRON Body Composition Monitor & Scale (up to 330 pounds)

OMRON’s monitor is the pick for people who want body composition numbers without handing them to an app. You stand on the foot plates and lift a retractable hand-held unit, so the current passes through arms, trunk and legs, and the display in your hands shows seven indicators: body fat percentage, skeletal muscle, BMI, resting metabolism, visceral fat, body age and weight. Skeletal muscle is the useful one for anyone losing weight, since the aim is to lose fat and keep muscle. Four people can store profiles, each with a 90-day memory, and there is no account, no Bluetooth and no syncing to set up. Well over ten thousand owners give it a strong owner rating. Capacity stops at 330 pounds, the maker lists it for adults up to about 6 feet 6 inches, and you cannot export the history. For private, stand-alone tracking, it is the best design here.
- Hand and foot sensors read more of the body than a foot-only scale
- No app, account or syncing, so data stays on the device
- Well over ten thousand owner reviews with a strong owner rating
- Stores four users with 90 days of history
- Capacity tops out at 330 pounds
- Listed for adults up to about 6 feet 6 inches tall
- No way to export readings to a phone
Tanita Body Composition Monitor, Made in Japan, BC-705N WH, Auto-recognition Feature for Easy Measurements

Tanita has been building body fat scales longer than almost anyone, and the BC-705N is its plain, compact stand-alone monitor. The feature it is sold on is auto-recognition: once profiles are set, the scale works out who has stepped on, so the daily routine is just standing on it. It is small, 278 by 285 millimeters and 36 millimeters high, weighs about 1.2 kilograms with its four AA batteries, is made in Japan and carries a one-year warranty. Well over ten thousand owners give it a solid owner rating, the biggest review base in this guide, though the rating sits below the RENPHO and the listing is thin on which measurements it reports and on capacity, so check the product page before buying. There is no app or phone link. For someone who wants a small, simple monitor from a specialist maker and does not need charts, it is a reasonable pick.
- Largest owner review base on this page
- Auto-recognition means no button presses before stepping on
- Compact and light at about 1.2 kg
- Made in Japan by a long-standing scale maker
- Listing gives few details on the metrics it reports
- Owner rating is solid, not outstanding
- No app or phone connection
INEVIFIT EROS Bluetooth Body Fat Scale Smart BMI Highly Accurate Digital Bathroom Body Composition Analyzer with Wireless Smartphone APP 400 lbs 11.8 x 11.8 inch (Black)

INEVIFIT’s EROS is a step up in build from the basic glass scales. The platform is 11.8 inches square in 6 millimeter tempered glass, thicker than the norm, with auto-calibrating sensors and a 400 pound capacity, and the 3.6 inch LED display lights automatically when you step on and is large enough to read without bending. Through the Eros Scale app it tracks 13 metrics, including body fat, water, muscle mass, BMI, BMR, bone mass and subcutaneous fat, for an unlimited number of profiles, and it syncs with Fitbit, Apple Health and other services. Thousands of owners give it a very strong owner rating. Like the RENPHO Elis 1 it reads through the feet only and needs the app for anything beyond weight, and it usually sits at a higher price than scales with comparable sensors. For a sturdier platform and a bigger display, it is worth the difference.
- Thousands of owner reviews with a very strong owner rating
- Thicker 6 mm glass platform
- Large 3.6 inch display is easy to read standing up
- Unlimited profiles and wide health-app syncing
- Costs more than basic Bluetooth scales with similar sensors
- Body composition metrics need the app
- Foot-only electrodes
RENPHO Body Composition Scale with Handle, 50+ Metrics, MorphoScan Base

The MorphoScan is RENPHO’s answer to the gym body-scan machine. A handle on a 60 inch elastic cable adds four hand electrodes to the four under your feet, and dual-frequency segmental BIA estimates fat and muscle for each arm, each leg and the trunk instead of extrapolating from the legs alone. The LED display shows BMI, body fat percentage, skeletal muscle percentage, a visceral fat index and a seven-day weight trend for up to eight users without the phone; the app adds more than 50 metrics and a segmental report you can print for a trainer or dietitian, and syncs with Apple Health, MyFitnessPal and Samsung Health. Capacity is 400 pounds and the battery is rated for up to 130 days. Thousands of owners give it a strong owner rating. It costs far more than a foot-only scale and the handle needs storing. For detailed tracking at home, it is the most capable pick.
- Eight electrodes read arms, trunk and legs separately
- Display shows key metrics and a seven-day trend without the phone
- Thousands of owner reviews with a strong owner rating
- Printable report for a trainer or dietitian
- Among the most expensive picks here
- Handle and cable need a place to store
- More data than a casual user will read
Xiaomi Body Composition Scale S400, Smart Scale for Body Weight with 25 Body Metrics, High Accuracy Body Fat Monitor, 36 Users, 0.1-150kg, White

Xiaomi’s S400 brings dual-frequency BIA, usually reserved for pricier machines, to a flat scale with no handle. Two measurement frequencies give the algorithm more to work with than a single one, and the app reports 25 metrics, including body fat percentage, muscle mass, body water, protein and bone mineral content. It recognizes and stores up to 36 users, far more than a household needs, and has modes for weighing a baby or pet and a static heart rate reading. The platform is 300 millimeters square with a hidden LED display that shows weight and heart rate, and three AAA batteries are rated for up to 180 days. Thousands of owners give it a strong owner rating. Capacity is 150 kilograms, about 330 pounds, below the 400 pound class, and the detail lives in the Mi Home app. For Xiaomi phone and watch owners especially, it fits neatly.
- Dual-frequency measurement in a plain flat scale
- Thousands of owner reviews with a strong owner rating
- Recognizes up to 36 users automatically
- Baby and pet weighing mode and a heart rate reading
- 150 kg capacity is lower than the 400 pound scales
- Needs the Mi Home app for the full picture
- Display shows only key readings
GE Smart Scale for Body Weight, BMI, Body Fat, Muscle Mass, Large Display

The complaint about most smart scales is that the scale shows weight and everything else hides in an app. GE’s scale puts a 5.3 inch color screen on the platform and shows eight key metrics, body fat and weight among them, the moment you step on. Behind that it estimates 14 indicators, including BMI, skeletal muscle, muscle mass, protein, BMR and visceral fat, weighs in 0.1 pound steps on an 11 inch tempered glass platform, and syncs through the Fit Profile app to Apple Health, Google Fit and Samsung Health. Setup is done once over Bluetooth, after which the scale works by itself day to day, and profiles are unlimited and private. More than a thousand owners give it a very strong owner rating. The listing summary does not state a maximum capacity and the model is newer than the leaders here. For reading results without a phone in hand, it has the best display.
- Eight metrics on the scale itself, not only in the app
- More than a thousand owner reviews with a very strong owner rating
- One-time setup, then it works without the phone
- US-based customer support
- Capacity is not stated in the listing summary
- Newer model with a shorter history than RENPHO or OMRON
- Foot-only electrodes
Tanita BF-679W Multi-Frequency Digital Body Fat and Body Water Scale - Smart Bathroom Weight Scale - Body Composition Monitor with Japan Technology - 300 lb Capacity - 2-User Memory

The BF-679W is the scale for a couple who want weight, body fat and hydration and nothing else. It uses bioelectrical impedance to estimate body fat percentage and body water, shows them on a large display with plain buttons, and stores two users with their previous readings so you can see the change since last time. A weight-only mode in pounds, kilograms or stone-pounds makes the daily check quick. It runs on four AA batteries, which are included, supports up to 300 pounds, and carries a three-year warranty, the longest stated on this page. More than a thousand owners give it a strong owner rating. Two user memories is the limit, the capacity is lower than the 400 pound glass scales, and you will not get muscle mass or visceral fat estimates. For people who find app scales more trouble than they are worth, it keeps things simple.
- Simple stand-alone scale with nothing to pair
- More than a thousand owner reviews with a strong owner rating
- Three-year warranty
- Weight-only mode for quick daily checks
- Stores only two users
- 300 pound capacity
- Reports fewer metrics than app-based scales
Compare the picks
| Product | Type | Capacity | App | Users | Our score | Our score | |
|---|---|---|---|---|---|---|---|
RENPHO Elis 1RENPHO | Bluetooth scale, 4 electrodes | 400 lb | RENPHO Health | Unlimited | 9.4/10 | 9.4 | See price |
OMRON Body Composition MonitorOmron | Stand-alone, hand and foot sensors | 330 lb | None | 4 | 8.6/10 | 8.6 | See price |
Tanita BC-705NTANITA | Stand-alone monitor | Not stated | None | Auto-recognition | 8.4/10 | 8.4 | See price |
INEVIFIT EROSINEVIFIT | Bluetooth scale, 4 electrodes | 400 lb | Eros Scale | Unlimited | 9.2/10 | 9.2 | See price |
RENPHO MorphoScanRENPHO | 8 electrodes with handle | 400 lb | RENPHO Health | 8 on display | 8.6/10 | 8.6 | See price |
Xiaomi S400Xiaomi | Dual-frequency scale | 150 kg | Mi Home | 36 | 8.8/10 | 8.8 | See price |
GE Smart ScaleGE | Bluetooth scale, color display | Not stated | Fit Profile | Unlimited | 9.2/10 | 9.2 | See price |
Tanita BF-679WTANITA | Stand-alone fat and water scale | 300 lb | None | 2 | 8.8/10 | 8.8 | See price |
How accurate is a body composition scale?
Weight is the part a home scale measures directly, and a decent one repeats to within a fraction of a pound on a hard, level floor. Everything else is an estimate: the scale measures electrical resistance and feeds it into a formula with your height, age and sex. Hydration, a recent meal, exercise and even damp feet shift the result, so two scales will rarely agree with each other or with a clinical scan. What the numbers are good for is direction. If the same scale, used the same way, shows body fat drifting down and muscle holding over several weeks, that trend is meaningful even if the absolute figure is off.
App or no app?
App scales such as the RENPHO, INEVIFIT, Xiaomi and GE store unlimited history, draw charts and share data with health platforms, which is useful if you already log food or workouts on a phone. The cost is setup, Bluetooth pairing and a health account held by the maker. Stand-alone monitors such as the OMRON and both Tanita models keep everything on the device, work the day the batteries go in and never need an update, but their memory is short and you cannot export it. Decide which annoys you less: an app, or writing a number in a notebook.
Getting consistent readings
Weigh at the same time each day, ideally in the morning after using the bathroom and before eating or drinking, with bare, dry feet. Put the scale on a hard, flat floor, never carpet, and let it re-zero after moving it. Stand still with weight evenly on both feet. Look at the weekly average more than any single reading, since body weight moves by a pound or two from day to day with water alone. Makers of impedance scales generally warn that people with a pacemaker or other implanted electronic device should not use the body composition function, and that readings are not intended for use during pregnancy; read the manual for your model and follow it.
What is the difference between a bathroom scale and a body composition monitor?
A bathroom scale measures weight. A body composition monitor also passes a very small current through the body and estimates body fat, muscle, water and related figures from the resistance it measures. Every pick here weighs you; most add those estimates.
Are body fat scales accurate?
They are consistent enough to follow trends but they are estimates, not medical measurements. Hydration, meals and exercise change the reading. Use the same scale under the same conditions and watch the direction over weeks, and ask a doctor about any health concern.
Is an eight-electrode scale better than a four-electrode scale?
It measures more of the body. Four foot electrodes send current through the legs and estimate the rest, while eight electrodes with a hand grip, as on the RENPHO MorphoScan and the OMRON hand-held unit, include the arms and trunk. That gives more detail, though it is still an estimate.
Can I use a body composition scale without a phone?
Yes. The OMRON and both Tanita models are stand-alone and need no app. The GE shows eight metrics on its own color screen after a one-time setup, and the app scales here still show weight without a phone nearby.
Who should not use a body composition scale?
Makers of impedance scales generally advise people with a pacemaker or other implanted electronic medical device not to use the body composition function, and say readings are not intended for pregnancy. Check the manual for your model and ask your doctor if unsure. Weight-only mode is a separate matter covered in the manual.
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