You can use your keyboard to see the next slide ( ← previous, → next)
The Tanita, made famous by The Biggest Loser
, and other body fat scales
use bioelectrical impedance (BIA) to gauge the amount of lean mass, water, and fat in your body by sending a current from the metal plates under your feet through your body and timing how long it takes. While they are a relatively cheap option—you can find them for as little as $19.99 at any department store, and you can use them in the privacy of your own home—they are notoriously unreliable. Take a huge drink of water and watch your percentage change by up to 10 percent.
From old-school calipers to space-age vessels, find out which method is the most accurate
The Best (and Worst) Ways to Measure Body Fat