Best smart scale for 2021: Withings, Fitbit, Garmin and Eufy, compared

Immediately’s rest room scales do much more than simply weight measurement. Many have sensors that may estimate physique metrics like your muscle mass and physique fats, calculate your physique mass index, measure your coronary heart price and even calculate your basal metabolic price, all in an effort to maintain monitor of your well being, meet a health objective or show you how to lose weight.

Good rest room scales use Bluetooth or Wi-Fi to sync all the physique composition metrics they report about you to an app in your telephone. Sometimes that is the app from the corporate that makes the size, however generally, you too can sync that knowledge to well-liked health apps like Google Match or Apple Well being, which can assist you contextualize your physique composition measurements by incorporating that knowledge into current data the apps have about your exercise and dietary habits. Like we stated, a Bluetooth good scale does a lot greater than the toilet scales or the body-fat scales of the previous.

To make it simpler so that you can pick the best smart scale, let’s undergo the professionals and cons of the highest good fashions in the marketplace by Withings, Fitbit, Garmin and others.

Learn extra: Peloton, Daily Burn and more: Best workout subscription apps 

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What makes the Eufy Good Scale so nice is not simply the size itself — it is the app that comes with it. The app, accessible for iOS and Android, may be very straightforward to navigate and gives detailed knowledge and studies of your weight, physique fats, water share, muscle mass, bone mass, BMI, BMR and extra. The app may also flag these measurements as low, regular or excessive, so you understand how your well being stats evaluate to what’s thought of the usual in well being and health in your peak and age.

The Eufy scale helps as much as 16 completely different customers within the app. Merely choose the proper person within the Eufy app and your entire knowledge and metrics from the good scale will sync to that profile within the cell app. It additionally connects with the Apple Well being app and Fitbit app.

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Withings’ digital rest room scale comes full of numerous options that go above and past the remainder. It gives detailed historic knowledge and metrics in your weight, BMI, physique fats, muscle mass, physique water, coronary heart price and bone mass, so you possibly can see how these measurements and your well being and health change over weeks, months, quarters and years. This Withings scale additionally information the climate day by day that you simply hop on the size, that will help you determine what to put on should you step on the good scale very first thing within the morning.

What units the Physique Cardio aside is that it has modes for pregnant girls, infants and athletes, every tailor-made to particular wants. If you’d like the good scale to trace your being pregnant, it should plot your weight modifications over the course of your being pregnant and recommend turning off the physique composition options, which are not as correct when you’re carrying.

Child mode means that you can maintain your toddler and step on the good scale to solely measure their weight. Athlete mode accounts for skilled athletes, bodybuilders and anybody who weighs extra as a result of they’ve a number of muscle mass and low physique fats and BMI.

Two extra bonuses: This rest room scale makes use of a chargeable battery (with a battery life of roughly 18 months) — many scales run on a bunch of AA batteries or AAA batteries — and it helps as much as eight completely different customers.

Additionally really useful


Do you already use a Garmin fitness tracker? You then would possibly need to get a Garmin Index S2 to go along with it. This scale is an replace to the Index scale I initially examined in 2019. The Index S2 features a new weight-tracking function on the display screen that retains tabs on weight modifications over the previous 30 days of readings. 

The Garmin Join app (Android and iOS) affords a holistic view of your well being, together with knowledge and metrics resembling your exercise degree, weight, BMI, physique fats share and different measurements and knowledge.

The good scale measures weight, BMI, physique fats, physique water, muscle mass and bone mass, and it affords correct charts to trace weight reduction and different knowledge over per week, a month and a yr. It makes use of 4 AA batteries, and battery life is as much as 9 months.


The Fitbit Aria Air is the newest good scale from Fitbit and it measures weight, BMI and physique fats. This digital rest room scale is greatest for individuals who at the moment use a Fitbit wearable and wish all of their knowledge — exercise, vitamin, weight, BMI, physique fats, sleep — in a single dashboard. 

The Aria Air is an replace to the Aria 2 I examined final yr. This Fitbit scale has a sleeker fashion and new display screen. Just like the Air 2, you possibly can have a number of profiles for various members of the family, and every of their metrics and knowledge are saved to their person profiles within the Fitbit app (Android and iOS).

The issues in measuring physique fats with a scale 

These good scales all go method past the choices of a typical digital scale. Every of them can measure your physique composition, weight and physique mass index, or BMI, utilizing {an electrical} present that travels from the size’s sensor by way of your leg, throughout your pelvis and down the opposite leg. It measures how a lot resistance that present encounters after which makes use of a mathematical method to estimate how a lot fats, muscle and bone makes up your total weight.

Whereas these options are helpful, they don’t seem to be all the time dependable for sensing lean mass versus fats. Consumer Reports tested the accuracy of many scales that measure BMI and physique fats share and located that almost all did not hit the mark in comparison with a BodyPod — one of many gold-standard clinical tests for physique fats measurements.

Knowledge inaccuracies in the case of fats share may be chalked as much as many issues, together with should you’re sick, retaining water weight, have just lately exercised, are menstruating or have consumed alcohol. Probably the most influential elements is the place you carry your weight — in case your chest and arms are slim, however you’ve gotten extra fats and muscle in your pelvis and legs, it’d incorrectly calculate your total physique fats share.

Every good scale I stepped on gave me a distinct physique fats share, however every quantity was inside a ten% vary. However for muscle mass share measurements, the vary was between 33% and 63%. Two of the scales I examined present a basal metabolic rate, however there was a whopping 631-calorie distinction between the 2. That is multiple McDonald’s Big Mac or three glazed Krispy Kreme donuts.

It is also price mentioning that BMI is not considered an accurate measure of 1’s physique fats or total health, so even right BMI data ought to be taken with a grain of salt.

All of that is to say, do not get caught up in these metrics. Comply with the instructions that include your good scale to get essentially the most correct measurements and knowledge attainable, and should you’re involved about your physique fats share, physique composition, well being or health, discuss to your physician about getting a correct scan. All of the fashions on this greatest good scale record give correct readings in the case of physique weight — which is an important issue if you’re centered on weight reduction. We’ll replace this record periodically.

Need extra well being and health suggestions?

The data contained on this article is for academic and informational functions solely and isn’t supposed as well being or medical recommendation. All the time seek the advice of a doctor or different certified well being supplier relating to any questions you will have a couple of medical situation or well being aims. being/health/best-smart-scale/ | Greatest good scale for 2021: Withings, Fitbit, Garmin and Eufy, in contrast


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