BCS body composition scales

How It Works

Tanita Body Composition Scales help you to understand the true impact of your lifestyle changes. You can easily track your progress, see what’s working and stay motivated.

As we have shown in the What is BMI section of this site although a useful tool BMI doesn’t hold all the answers and can also mask some significant health issues.

This is where Tanita’s body composition monitors can prove invaluable. On this page we will look to give a quick overview of how they work and the benefits of their use.

Tanita’s range of Body Composition Monitors only use advanced Bio-electrical Impedance Analysis (BIA) technology. Here we explain a little of how this technology works.

When you stand on a Tanita body composition monitor, your feet will be positioned on the four electrodes. A very low, safe electrical signal will be sent through your feet to your legs and abdomen. In the segmental models, you will also hold 4 electrodes. On these models the signal also passes from your hands, arms and chest to your legs.

The signal passes quickly through the water held in hydrated muscle tissue but meets resistance when it tries to pass through fat tissue. This resistance, also known as 'impedance', is measured and input into medically validated equations that calculate your body composition.

Start taking a positive step towards better inner-health

Fast, accurate and simple to use, Tanita Body Composition Scales will tell you much more than just your weight.


Your body is mainly composed of muscle, fat and water. When you exercise more or start dieting, your body composition will change, even if your weight stays the same. This is why:

  • As you exercise more, you develop more muscle mass and reduce fat. Your weight might even increase at a certain point, as your muscle mass increases.
  • Very low calorie diets may force your body into 'starvation' mode. Storing body fat rather then burning it. So even if you lose weight, your fat ratio will increase.
  • Quick-fix, crash diets may produce speedy results, but the weight loss will be in the form of body water and healthy, lean muscle tissue

Trusted by experts

When it comes to health monitoring, Tanita is the first choice among experts. Sports coaches, health providers, scientists and global brands know they can trust Tanita to deliver the standard they require. We can do the same for you


Committed to health

We don't just measure. We work to empower everyone to change their health for the better whether that's individuals, sports teams or families. We also fund medical research projects worldwide that contribute to our understanding of how to lead a healthier and fitter life.

With Tanita professional Multi-Frequency Monitors you are also able to measure impedance at several different frequencies. The lower frequencies are used to measure the impedance external to the cell membrane and the higher frequencies are able to penetrate the cell membrane.

By measuring impedance at both the lower and higher frequencies it is possible to estimate extra-cellular water (ECW), intra-cellular water (ICW) and Total Body Water. This information is essential for providing the health status of a person and indicating health risks such as severe dehydration or oedema. The additional frequencies provide a higher level of accuracy compared to single frequency monitors.

Tanita’s range of professional products meet the needs of medical, nutrition and weight management professionals.

Benefits for Healthcare Professionals

As well as being an essential tool for assessing obesity-related health risks, Tanita Body Composition can also be used to support a preventative health program, helping to educate patients about the importance of maintaining healthy fat levels for life-long good health. By understanding what is going on inside their bodies, those with weight-related problems can make better-informed decisions about their behavior. Using an analyser can clearly demonstrate the effectiveness of a treatment program - especially if obesity-related medication is part of the program.

Tanita’s professional range of Body Composition Analysers makes the job of tracking, monitoring and reporting progress easy and effective. As well as Analysers with in-built printers that provide an immediate report of your patient’s current body composition, the professional range includes Analysers that link wirelessly to your computer to provide a more detailed picture. Tanita’s bespoke software (GMON) is designed to help you track your patients’ progress, with graphs and historical comparisons that will help you to provide a clear picture of their health and progress at each stage. This powerful method of reporting will help to motivate them and keep them on track to reach their goal.

Benefits for Weight Management Professionals

Clients who are informed about the importance of body fat loss, rather than just weight loss, are far more likely to stay on a program for longer without loss in enthusiasm – especially when they hit the common ‘weight plateau’. This is because body composition analysis will show an increases in muscle mass and decreases in body fat that doesn’t always manifest in actual weight loss. By understanding why weight loss has slowed down, and by seeing the results in increased healthy muscle mass, clients are less likely to lose motivation. A Tanita Body Composition Analyser will help you to demonstrate the effectiveness of your weight management program and gain the respect and compliance of your clients. If you use the results to explain how their body composition affects their overall health and to set goals; then give them reports that track their progress so they can celebrate their achievements. This will also stand you apart from you competitors and offer additional incentive for you clients to keep coming back.

Benefits for occupational health Professionals

With many organisations now offering their staff occupational health services. Tanita Body Composition Analysers are a perfect addition to your service. Not only will it help stand your services apart from the competition. It will offer greater patient information and additional incentive for them to remain within your scheme.

Companies and occupational health professionals already using Tanita Body Composition Analysers in their wellness programs have shown that as well as increasing productivity, taking care of their employees will help to boost morale and staff loyalty.

Also assessing the health of your entire workforce will give you the information needed to develop a targeted wellness strategy. Whether you give your employees specific goals to improve their diets and increase their exercise, or you introduce water coolers to improve hydration levels; regular checks will enable you to work with them to ensure that they stay healthy.

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