FFMI Chart
FFMI Categories
| Category | Men (FFMI) | Women (FFMI) | Description |
|---|---|---|---|
| Low | < 18 | < 15 | Below average muscle mass |
| Normal | 18 - 20 | 15 - 17 | Average muscle mass |
| Above Average | 20 - 22 | 17 - 19 | Above average muscle mass |
| Excellent | 22 - 25 | 19 - 22 | Significant muscle development |
| Superior | 25 - 27 | 22 - 24 | Very rare, exceptional genetics |
| Suspicious | > 27 | > 24 | May indicate PED usage |
Body Stats Summary
| Stat | Value | Interpretation |
|---|---|---|
| Fat-Free Mass (FFM) | - | Total weight excluding fat |
| Fat Mass | - | Total weight of body fat |
| BMI | - | Body Mass Index |
| FFMI | - | Fat-Free Mass Index |
| Normalized FFMI | - | Adjusted for height |
The FFMI Calculator helps you estimate your Fat-Free Mass Index. FFMI tells you how much lean mass (muscle, bones, organs, etc.) you have compared to your height. It is commonly used by fitness enthusiasts, bodybuilders, and athletes to monitor muscle growth and progress without considering fat.
What is FFMI?
FFMI stands for Fat-Free Mass Index. It’s similar to BMI (Body Mass Index), but instead of using your total weight, FFMI focuses on your fat-free weight. This makes it a better tool for measuring muscle development.
FFMI Formula
FFMI = (Lean Mass in kg / Height in meters²)
Lean mass is your body weight minus fat. If you know your body fat percentage, you can calculate it easily:
Lean Mass = Body Weight × (1 − Body Fat %)
Example
If someone weighs 80 kg, is 1.80 meters tall, and has 15% body fat:
Lean Mass = 80 × (1 − 0.15) = 68 kg
FFMI = 68 / (1.80 × 1.80) = 68 / 3.24 = 20.99
What is a Good FFMI Score?
Below 18: Below average muscle mass
18 - 20: Average range
20 - 22: Fit and muscular
22 - 25: Very muscular
Above 25: Exceptional (may be due to genetics or enhancements)
Why Use the FFMI Calculator?
This calculator gives you a clearer picture of your muscle status. If you're working on gaining muscle or cutting fat, FFMI is more reliable than BMI. It helps you understand if your gains are real muscle or just fat.
No Cost, Full Value
You don’t need to spend a single $ to check your FFMI. It's completely free and gives instant results. Whether you’re new to fitness or an experienced lifter, this tool helps keep your progress on track.
Try the FFMI Calculator today and measure how lean and strong you really are.