I just did it - but fudged a little bit since I am wearing multiple layers of clothes and didn't feel like stripping down for the measurements - it's still January out here, and cold - so I did it as best I could by pulling up layers where possible or over them (and making an adjustment for that) and so I fully realise that the margin of error here is pretty humongous - but I came out at 25% body fat which isn't too bad. I might try it again at some point where I am actually closer to the core body shape in terms of clothes layers and see if I can't narrow it down...