BMI can't tell muscle from fat. FFMI can — enter your weight, height and an estimate of your body fat to see how much lean mass you carry for your height.
Below 18 (men) · Below 15 (women)
18 – 19.9 (men) · 15 – 16.9 (women)
20 – 21.9 (men) · 17 – 18.9 (women)
22 – 24.9 (men) · 19 – 21.9 (women)
25 and above (men) · 22 and above (women)
Fat-Free Mass Index divides your fat-free mass (everything that isn't body fat — muscle, bone, organs, water) by your height squared. BMI uses total weight, so a muscular person and a person with more body fat can share the same BMI. FFMI separates the two, which makes it more useful for people who train.
For men, a normalized FFMI of roughly 18–20 is common, 20–22 reflects noticeably above-average muscle, and 22–25 is typical of people with years of consistent strength training. Women's values typically run about 3 points lower. These are broad population ranges, not targets.
Taller people tend to have a slightly lower FFMI for the same build. The normalization (adding 6.1 × (1.8 − height in metres)) adjusts values to a reference height of 1.80 m, so people of different heights can be compared more fairly.
Quantum Khor is a wellness companion, not a medical device. It does not diagnose, treat or prevent any condition.