FFMI Calculator
Calculate your Fat-Free Mass Index, a measure of muscularity.
Loading...
Measure Your Muscularity with the Fat-Free Mass Index
Our FFMI Calculator helps you determine your Fat-Free Mass Index, providing a more accurate measure of your muscularity than BMI for athletes and fitness enthusiasts.
What is an FFMI Calculator?
An FFMI (Fat-Free Mass Index) Calculator is a tool used to assess a person's level of muscularity relative to their height. Unlike BMI, which can be misleading for athletic individuals, FFMI separates fat mass from lean body mass (muscle, bone, organs). This makes it a superior metric for bodybuilders, athletes, and anyone serious about tracking their body composition and strength progress.
How It Works: The FFMI Formula
The calculator first determines your lean body mass and then calculates the FFMI:
1. Fat Mass = Total Weight × (Body Fat % / 100)
2. Lean Mass = Total Weight - Fat Mass
3. FFMI = Lean Mass (kg) / (Height (m))²
4. Adjusted FFMI = FFMI + 6.1 × (1.8 - Height (m))
Frequently Asked Questions
What is FFMI?
FFMI stands for Fat-Free Mass Index. It is a measure of your muscularity relative to your height, calculated by taking your lean body mass (your weight minus your fat mass) and adjusting it for your height. It's often considered a more useful metric than BMI for athletes and bodybuilders.
How is FFMI calculated?
FFMI is calculated with the formula: Lean Body Mass (kg) / (Height (m))². Lean Body Mass is found by subtracting your fat mass from your total weight. Our calculator also provides an 'Adjusted FFMI' which accounts for height variations.
What is a good FFMI score?
A good FFMI score varies by gender. For men, an FFMI of 20-21 is considered above average, while 22-23 is excellent. For women, 17-18 is above average, and 19-20 is excellent. Scores above 25 for men and 22 for women are difficult to achieve without steroids.
What is the difference between BMI and FFMI?
BMI (Body Mass Index) only considers total weight and height, so it cannot distinguish between muscle and fat. FFMI is superior for assessing muscularity because it specifically uses your lean body mass, providing a more accurate picture of your physique.
Advertisement Placeholder