FFMI Calculator

FFMI denotes Fat Free Mass Index. It is a value from the percentage ratio of body fat percentage, the size in meters and weight in kg. It is an alternative to BMI where in FFMI, the muscle along with fat mass is considered based on height and weight. But the muscle mass is not taken into consideration in BMI. This online FFMI calculator will help you to find your Fat free mass index using your body fat value. It is an important number to know when trying to get six pack abs, aka the 6pack.

Fat Free Mass Index Calculation

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Formula:

Lean = Weight * ( 1.0 - (BodyFat / 100.0 )) FFMI = ( Lean / 2.2 ) / ((Height * 12.0 + Inches) * 0.0254)2 Adjusted FFMI = FFMI + ( 6.0 * ( ((Height * 12.0 + Inches) * 0.0254) - 1.8 ))

Fat free mass index calculation is useful for athlete people who has muscle rich body.

Example

A person weighing 50 kgs, with body 12 % and height 5'4 will have

Lean Weight

Lean Weight = 50 * (1.0 - (12 / 100))
= 50 * ( 1 - 0.12)
= 50 * 0.88
= 44.00 kg

Fat Free Mass Index

= ( 44 / 2.2) / ((5*12.0) + 4)*0.0254)^2
= 20 / ((60 + 4) * 0.0254)^2
= 20 / (1.6256)^2
= 20 / 2.6425
= 7.56

Adjusted FFMI

Adjusted FFMI = FFMI + (6* 5 + 12.0 + 4) * 0.0254) - 1.8
= 7.56 + ( 6.0 * ( ((5 * 12.0 + 4) * 0.0254) - 1.8 ))
= 6.522

Note :This statistics calculator is presented for your own personal use and is to be used as a guide only. Medical and other decisions should NOT be based on the results of this calculator. Although this calculator has been tested, we cannot guarantee the accuracy of its calculations or results.

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