Your questions about bathroom scales answered What are the best bathroom scales?The Eufy smart scale P2 pro is my favourite smart scale of the lot. It’s cheap, syncs with Bluetooth and wifi, provides thorough body composition measurements and looked the sleekest of the bunch. If you want a detailed look at your body’s metrics, I can’t fault the Withings body comp smart scale, which is so comprehensive, featuring a pulse wave velocity sensor so I could analyse my overall cardiovascular health. If you don’t mind the hefty price tag, the Withings machine is the one to get. How I tested bathroom scales I’ve spent several months testing a mix of smart and digital bathroom scales, using each one regularly to track body composition metrics and compare week-to-week trends. I do CrossFit most days, occasionally intermittent fast and regularly monitor my weight and muscle mass as part of my routine, so I was particularly interested in finding the best scales for tracking my progress.I’ve looked at how consistent the readings were across multiple weigh-ins, how intuitive the setup felt and how good the companion app was for monitoring changes over time.While the BIA-based smart bathroom scales in this list are safe for most people, manufacturers advise against using them if you’re pregnant or have a pacemaker. You can find out more about my testing process at the end of this article. Accuracy and consistency: I weighed myself multiple times a week on each scale to see how consistent the readings were. I noted down if the numbers stayed fairly consistent, jumped around or didn’t reflect real changes over time.Smart features: I’m data obsessed, so I looked at what each scale could actually track, not just body fat or BMI, but other metrics like muscle mass, heart rate and body water.App experience: I downloaded every app and used it daily to log my weigh-ins, looking at how easy it was to use, whether I could spot trends easily and the simplicity of switching profiles, setting goals or syncing with other apps like MyFitnessPal or Apple Health. Design and usability: A smart scale shouldn’t be an eyesore in your bathroom. As well as how it looked, I tested how easy each scale was to store, how readable the screen was and whether it responded well when stepped on, as well as sturdiness and flimsiness underfoot. Extra features: I tried out baby and pet modes (where available) and tested object weighing for things like luggage, and looked at whether the scales connected via Bluetooth, wifi or both.How do smart scales work?Smart scales help to give you a clear picture of your health and fitness by offering additional metrics besides weight, including body mass index (BMI), body fat percentage, muscle mass and more. They do this by sending a small, non-harmful electrical impulse through your body to measure the resistance, or impedance, your body gives against the current in bone, fat and muscle. They must be used barefoot and it is important to note that they should not be used by anyone who is pregnant or anyone who uses a pacemaker.Are smart scales more accurate than mechanical scales?While mechanical and digital scales can give you a basic reading of your weight, smart scales can provide you with even more information about your body, allowing you to log your weight and track changes remotely on your smartphone. They are the most accurate of all the options and also offer the most comprehensive view of the composition of your body.What other features should I look for in a smart bathroom scale? As well as tracking your weight, smart scales can calculate everything from body fat and muscle mass to BMI, water percentage and even your resting metabolism. These measurements can help give a better overview of your general health and knowing how much fat, water, muscle and bone your body is made up of can give insight into whether you are achieving your health goals. However, it's important to remember that these values are estimates and that you should always consult a doctor for the most accurate measurements and advice. Some smart bathroom scales also give users the option to measure objects and babies, and the best ones have simple-to-use apps with goal-setting features to keep you on track. Why you can trust IndyBest reviewsAlex Lee is The Independent’s senior tech critic and has been reviewing everything in the world of health tech for almost a decade. He’s tested hundreds of gadgets over the years, from fitness trackers and smartwatches to sleep tech and massage guns, so he knows what to look for when it comes to app experience, user design and long-term usability. For more bathroom gadgetry, take a look at our guide to the best electric toothbrushes