Best Smart Scales and Body Fat Scales

1. Our Picks at a Glance

Five scales, from about $25 to about $500. For most people the Withings Body Smart is the best smart scale: accurate weight, a clear app, eight users, and a weight-only mode for anyone who should not use bioimpedance. On a budget, the Wyze Scale X and the Renpho Elis 1 do the basics for a fraction of the price.

If you are pairing a scale with a wearable, our roundup of thebest fitness trackerscovers which ecosystems each one syncs with, and thehome gym hub collects the rest of this series.

2. The 5 Best Smart Scales

Each card gives only the figures we could confirm in two places, the price we saw on Amazon US on 19 October 2026, and who the scale suits. Every one of these is a bioimpedance scale; the differences are in the app, the number of users, connectivity, extra features and — importantly — whether it has a way to switch the current off.

The cards are ordered by how many people each suits. Weight accuracy is not a meaningful difference between them; the app and the modes are.

3. How We Chose These Smart Scales

We have not tested these scales. They were chosen from maker product pages and manuals, Amazon listings, recall records and independent hands-on reviews — chiefly Tom's Guide's reviews and smart scale guide, updated in July 2026 — checked on 19 October 2026, and the claims on this page are limited to what those sources support.

We looked for scales that are sold on Amazon US under the brand's own listing, that an independent reviewer had used, and that publish their safety guidance on bioimpedance. For each, we read the manual or product page for who should not use body-composition mode, and we say on the card, and in the section below, exactly what the maker says. We did not rate scales on body-fat accuracy, because no consumer review can establish it without a reference method, and makers do not publish comparable validation data.

Several familiar names fell out. The Fitbit Aria Air did not appear on Amazon US when we searched on 19 October; Tom's Guide lists it at Best Buy and suggests it only for existing Fitbit users. We found no Eufy smart scale on Amazon US on that date either. Withings Body Scan 2, the newer version of the Body Scan, is reviewed by Tom's Guide at $599 but we did not find it on Amazon US, so the card is for the original Body Scan, which Amazon itself was selling. TheRenpho MorphoScan is an eight-electrode scale with a handle at a lower price than the Body Scan, but Tom's Guide found its in-app analysis inaccurate and often contradictory, so we left it out. Etekcity, Arboleaf, FITINDEX and many other budget brands sell body fat scales on Amazon; we did not find independent hands-on coverage for the specific current models in time to card them.

Every brand on this page was searched in the CPSC recall database by recall title, manufacturer and recall description, along with the terms "scale" and "body composition." We found no recall for any scale on this page, and those category searches turned up no recall of a bathroom or body fat scale. The only recent scale recall they found was a January 2025 recall of Greater Goods digital kitchen scales under the federal button-battery safety rules; kitchen scales are not covered here. Wyze recalled a security camera in June 2026 and Anker, Eufy's parent, has recalled power banks and other battery products; none of those is a scale.

4. How a Body Fat Scale Works

Step on a body fat scale barefoot and it sends a small electrical current, which you will not feel, through metal electrodes under your feet, up one leg and down the other. Garmin's manual describes exactly this. Water and the lean tissue that holds most of it conduct the current well; fat conducts it poorly. The scale measures how much the current is impeded, then puts that figure, your weight and the height, age and sex you entered into an equation to estimate body fat, muscle, water and bone.

Three design choices change what the scale can estimate:

• Four electrodes or eight. A standard scale has four, all under your feet, so the current mostly travels through your legs and lower body and the rest of you is inferred. Scales with a handle, like the Withings Body Scan, add electrodes for the hands, which lets them estimate arms, legs and trunk separately.
• Single or multiple frequencies. Different frequencies pass through tissue differently. Withings says its Body Smart uses multi-frequency analysis; most budget scales do not say. More frequencies give the equation more information, not a direct measurement.
• The equation. Every maker uses its own, built from reference studies on groups of people. If your build is unlike the reference group — very muscular, very lean, older, younger — the estimate can be further off, which is why several scales offer an athlete mode.

None of that makes the scale useless. It means the scale is estimating, and the estimate is only as consistent as the conditions you give it.

5. How Accurate Is a Smart Scale? Weight vs Body Fat

Weight: as accurate as a good digital bathroom scale. Withings rates the Body Smart and Body Scan to 0.1 lb increments, and Renpho the Elis 1 to 0.2 lb. Place any scale on a hard, flat floor; carpet makes weight readings unreliable, which is why Garmin ships the Index S2 with risers for carpet.

Body fat and the rest: an estimate that moves with your hydration. Because water carries the current, anything that changes how much water you are holding, or where, changes the reading. A large drink, a meal, a hard workout, a sauna or a hot shower, alcohol the night before, and the fluid shifts many women notice across the menstrual cycle can all move the figure by more than your body fat has actually changed. Garmin's manual recommends waiting two hours after eating, drinking, exercising, bathing or visiting a sauna, and using the scale under the same conditions at about the same time of day. Wyze's listing says its body-composition data is for long-term trends, not single comparisons, and that surface, posture and foot contact affect it.

How to get a figure worth tracking

• Same time, same state. First thing in the morning, after using the bathroom and before eating, drinking or exercising, is the most repeatable moment for most people.
• Barefoot, dry feet, centered on the electrodes. Socks block the current; very dry or calloused skin and damp feet both change contact.
• Watch the weekly average, not the day. A single reading can swing with what you drank last night. A seven-day average moving in one direction over a month is a real signal.
• Do not compare scales. Two brands, or a scale and a gym's machine, use different equations and will disagree. Pick one and stay with it.

The same honesty applies to every number a fitness device gives you. Our guide towhether treadmill calorie counts are accuratemakes the same point about estimates from models, and ourfitness tracker guidedoes it for heart rate and sleep.

6. Who Should Not Use a Body Fat Scale

Bioimpedance passes a current through your body, so every maker on this page tells some people not to use the body-composition feature. The groups are similar but the wording differs, so here is what each maker says, from the manual or product page we could read on 19 October 2026.

In plain terms: if you have a pacemaker, an implanted defibrillator or any other implanted or body-worn electronic medical device, do not use body-composition mode at all unless your device's manufacturer and your clinician say you may; use weight only, or a plain scale. Wyze adds that you should check your medical device maker's instructions. If you are pregnant, use weight only or a pregnancy mode that the maker says turns the current off, and ask your obstetric care provider what they want you to track.

Groups for whom the reading is less meaningful. Wyze's guide also says that people under 18 or over 65, or who are pregnant, have osteoporosis or very low bone density, have edema, or are on dialysis should treat the body-fat figure only as a reference, because it may be inaccurate for them. The same logic applies to anyone whose fluid balance is affected by a medical condition or medication: the scale's equation assumes typical hydration, and you may not have it.

Weight on its own is safe for everyone on any of these scales once the current is off, and for many people the weight trend is the only number worth following anyway.

7. Which Smart Scale Numbers Are Worth Watching

A scale may show a dozen figures. They are not equally useful.

• Weight trend. The most reliable figure on the scale, and the main reason to own a smart one: automatic logging turns noisy daily weights into a trend line you can trust.
• Body fat percentage trend. Useful for direction over weeks, when measured the same way every morning. Not useful as an absolute figure to compare with a friend, a chart or a gym machine.
• Muscle or lean mass. Derived from the same reading, so it moves with hydration in the same way. A sudden "loss of muscle" after a hard, sweaty session is usually water.
• Body water. The figure the reading is most directly built on, but it is still an estimate; do not use it to judge whether you are dehydrated.
• Visceral fat, metabolic age, BMR, bone mass. Further estimates stacked on the first. Treat them as curiosities unless a clinician asks for them.
• Heart rate and ECG features. The Withings scales read heart rate through your feet, and the Body Scan adds an ECG with what Withings describes as atrial fibrillation detection. These are the maker's claims; a scale is not a substitute for a doctor's assessment, and any symptoms need medical attention whatever it shows.
• BMI. Simple arithmetic from weight and height, so it is as accurate as your weight, but it says nothing about body composition. Garmin's manual says its BMI categories apply to adults.

If you are using a scale to follow a weight-loss plan built around walking or running, our guides to thebest treadmill for weight lossandwhether treadmill work burns belly fatare honest about what exercise alone can do.

8. What to Look For in a Smart Scale

A way to turn the current off

For a household, this is the first thing to check. If anyone who will use the scale has an implanted device or may become pregnant, buy one with a clearly documented weight-only or pregnancy mode, such as the Withings or Wyze scales here.

The app and where your data goes

The scale is a sensor; the app is the product. Check that it syncs with what you already use — Apple Health, Health Connect, Fitbit or Google Health, Garmin Connect, MyFitnessPal — and look at how it shows trends. Garmin's scale is the obvious choice for Garmin watch owners; the Withings app is the one independent reviewers most often praise.

Wi-Fi or Bluetooth

Wi-Fi scales upload a reading as soon as you step off. Bluetooth-only scales, like the Wyze Scale X and Renpho Elis 1, sync when your phone is nearby with the app able to connect, which is fine if your phone is in the bathroom and annoying if it is not.

Users and recognition

Scales recognize users by weight and, on some, by stored profiles. Eight users is common; Garmin allows 16 and Renpho unlimited app profiles. Two people of similar weight can be confused, so check how the app lets you reassign a reading.

Subscriptions

Withings sells Withings+, an optional subscription that adds extra scores and coaching; Tom's Guide reports it at $99 a year. Basic readings and trends are free on every scale here, so treat any subscription as optional.

Capacity, batteries and floor

Most of these scales are rated to about 400 lb; if you are near the limit, check the exact listing, because published figures differ between sources for some models. AAA scales run for many months; the Body Scan is rechargeable. Put the scale on hard flooring, and keep it in one place so the readings stay comparable. If you are also checking a treadmill's limit, ourtreadmill weight capacity guideexplains how those ratings work.

FSA and HSA

Several of these listings describe the scale as FSA or HSA eligible. Eligibility depends on your plan; our guide towhether fitness equipment is HSA/FSA eligibleexplains how plan administrators usually decide.

9. Using a Smart Scale Alongside Your Training

A scale is most useful as one quiet input among several, checked at the same time each morning and reviewed weekly, not daily.

• Weigh before training, not after. A long treadmill session or a hot home-gym workout can drop several pounds of water, and the body-fat estimate jumps around with it.
• Expect strength training to confuse it. Muscle soreness and the water that comes with it can raise weight and shift body-fat estimates for a few days after a hard session. If you have just started lifting with, say,adjustable dumbbells, give it weeks before reading anything into the trend.
• Pair it with something you can feel. How your clothes fit, how your usual treadmill pace feels, and how much you can lift are useful checks on whatever the scale says.
• Walking counts. If your plan is built around daily walking, our page on whetherwalking pads help you lose weightsets realistic expectations.

10. Who Should Buy Something Else

If only weight matters to you, a plain digital bathroom scale and a note on your phone do the job. You give up automatic logging, nothing else.

If you have an implanted electronic device and no one else in the house needs body composition, buy a weight-only scale and avoid the question entirely.

If you need a body-composition figure you can rely on — for a clinical reason, a weight-class sport or a research goal — ask about a reference method such as a DEXA scan through a clinician or a university or sports facility. A bathroom scale cannot substitute for that.

If you are most interested in activity and heart rate, a wearable gives you far more for the money; see ourbest fitness trackersandheart rate monitorguides.

11. Frequently Asked Questions