Note that a bigger LMI means a leaner body. A set of such values are provided in the tables below. Reference values using lean mass index as a measure of lean body mass standardized for height are most useful in practice. Even the leanest women rarely fall below 10-12% body fat. For women the lower limit for the reference woman equals about 12% essential fat. Marathon runners can go down to 1% body fat. The minimal lean body mass for the reference man (61.7 kg) includes 3% of essential body fat. There are standards for leanness derived from scientific studies of certain populations. The inputs can be weight pounds or kilograms for the total body weight, and feet and inches, centimeters or meters for body height. The lean body mass calculator also outputs the lean mass index (LMI) in kg per meter squared (kg/m -2) which is a measure similar to BMI but for lean mass instead of total body mass. These error bounds on the estimate have to be taken into account when using the calculation results for the amount of muscle, ligaments and essential fat which constitutes the lean body mass. In calculating lean body mass with these equations the standard error of the estimate is ~3.5 percent points in either direction, meaning that about 68% of estimated body fat percentages will fall within ☓.5 of the true BFP, while ~95% of estimated BFPs will fall within ☗ of it. Note the instructions on obtaining accurate measurements. Navy Method Body fat formula and then subtracts the fat percent from the total mass to produce the final estimate. lean body weight, LBW), the calculator uses the U.S.
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