Estimador de Composicao por Bioimpedancia Gratis

Estime massa gorda, massa magra e massa muscular a partir da leitura da balanca BIA.

lbs
%
inches

Fat Mass

39.6 lbs

Lean Mass140.4 lbs
Estimated Muscle Mass77.2 lbs
Estimated Body Water56.9 %

Fat Mass vs Body Weight

Ver formula →

Formula

Understanding BIA (Bioelectrical Impedance Analysis)

BIA scales send a small electrical current through your body. Fat tissue conducts less electricity than lean tissue, allowing the device to estimate body composition.

From BIA Body Fat % We Can Derive

  • Fat Mass = Weight x Body Fat %
  • Lean Mass = Weight x (1 - Body Fat %)
  • Muscle Mass ~ Lean Mass x 0.55 (skeletal muscle is about 55% of lean mass)
  • Body Water ~ Lean Mass is about 73% water

    • Exemplo Resolvido

    A 180 lb male at 22% body fat per BIA scale.

    1. 01Fat mass = 180 x 0.22 = 39.6 lbs
    2. 02Lean mass = 180 x 0.78 = 140.4 lbs
    3. 03Est muscle = 140.4 x 0.55 = 77.2 lbs
    4. 04Est water = 0.78 x 73 = 56.9%

    Perguntas Frequentes

    How accurate are BIA scales?

    Consumer BIA scales can be off by 3-8% for body fat. They are most useful for tracking trends over time rather than absolute accuracy.

    What affects BIA accuracy?

    Hydration level, recent exercise, meals, and time of day all affect readings. Measure at the same time under the same conditions for best comparisons.

    Is BIA better than BMI?

    BIA provides more information than BMI because it distinguishes between fat and lean tissue. However, neither is as accurate as DEXA scanning.

    Aprender

    Understanding BMI: What It Means and How to Calculate It

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