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Lean Body Mass Calculator

The Lean Body Mass Calculator can measure the total body weight. Know more!

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Home / Health Insurance / Calculators / Articles / Lean Body Mass Calculator

When you start your fitness journey, the most common parameters measured include body weight followed by body fat percentage. Most people trying to lose weight mainly aim to lose fat, not just weight. In fact, a lot of people who are very muscular and fit actually weigh more than those with more body fat. Lean body mass refers to the entire body composition except for body fat. This includes the skin, bones, blood, and other organs. Therefore, measuring the total body weight and deducting the body fat from it can give a measure of lean body mass. A Lean Body Mass Calculator can help in this regard. 

Using a Lean Body Mass Calculator
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Using the calculator is a simple process. You are required to enter the following parameters in the calculator featured on a credible website/app.

The Lean Body Mass Calculator gives an approximate percentage using one of the following formulae.

A lean body mass of about 60-90% is considered to be healthy. People trying to lose weight should aim for a higher lean body mass as it means that excess fat is lost and muscle deposition is increasing.

Lean Body Mass vs Fat-free Mass
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To understand the difference between these terms, it is necessary to know how fat is stored in the body.

The three main forms of stored fat are as follows.

Fat-free mass is the body weight minus the total of all types of fat in the body. Lean body mass includes the essential fat that is vital for life. This essential fat amounts to 10-13% for women and 2-5% for men. This difference is genetic, as females are more prone to fat deposition than males.

Importance of lean body mass
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Here are some points to note regarding the importance of lean body mass. 

How can lean body mass be increased?
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People with a lean body mass index below 60% need to decrease body fat to maintain good health. Here are a few simple tips.

Caution: It is not advisable to start using heavy weights or gym equipment without the supervision and guidance of a trainer, especially if you are unfamiliar with strength training. Always consult your doctor to get clearance, especially if you are prone to joint problems.

Frequently Asked Questions
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Here’s a list of common questions and answers related to the Lean Body Mass Calculator.


I am an 18-year-old male. I weigh 85 kg and my height is 175 cm. What is my lean body mass?

Using the Lean Body Mass Calculator, your lean body mass is 62.12 kg (73%). 

I have been going to the gym for the last 3 months but my weight is not reducing. What could be the reason?

Simply going to the gym might not be ideal to lose weight. You need to focus on improving your diet as well. Also, the quality of sleep matters. Collectively, it’s the workout, diet, and rest that help burn fat and increase lean body mass. Speak to a certified fitness trainer about your goals and work continuously towards them. 

Body weight alone is not an appropriate indicator of health. When going to the gym, it is important to maintain a good balance of cardio and strength training and monitor your measurements and lean body mass or body fat percentage regularly for best results.

Which exercises should I do to improve lean body mass?

The kind of exercises you can do will depend upon the equipment available to you. You can start with push-ups and squats using body weight and then gradually move on to weight training in a gym. Please consult a certified fitness trainer for precise exercises to improve lean body mass as per your body composition. 

Disclaimer: The content on this page is generic and shared only for informational and explanatory purposes. Please consult a doctor before making any health-related decisions.