Calculating Body Fat % (A Rough Estimate)

I found this poster today:

20121116-133406.jpg
I’ve always wondered what my body fat percentage was, but I’ve never gone to have it tested because, frankly, I don’t know where to go or how to do it. So, when I came across this formula for an estimate of body fat percentage, I was excited to give it a try.

If anyone out there knows their body fat percentage and would be willing to use this formula to see what the difference is in the numbers, that would be awesome! I’d love to know how close (or not) to accurate this is.

Anyway, I decided to give it a try.

Body weight – 202 lbs
Wrist – 6.5 in
Waist – 37 in
Hips – 46.5 in
Forearm – 10.5 in

1. 202 x 0.732 + 8.987 = 156.851
2. 6.5 / 3.140 = 2.070
3. 37 x 0.157 = 5.809
4. 46.5 x 0.249 = 11.578
5. 10.5 x 0.434 = 4.557
6. 156.851 + 2.070 = 158.921 – 5.809 = 153.112 – 11.578 = 141.534 + 4.557 = 146.091 Lean Body Mass
7. 202 – 146.091 = 55.909 Body Fat Weight
8. 55.909 x 100 = 5590.0 / 202 = 27.6 % Body Fat Percentage

According to this method, I am about in the middle of the acceptable range. Pretty cool, if it’s accurate!

Try it for yourself. Again, I’m sure it’s just a rough estimate, but this could be used to show a general reduction in body fat percent, just so long as you use the same formula each time. I think I might start using this formula each month to see what’s changing in my body.

I’ll say it again, if you do know your body fat percentage, please use this formula so we can all see how accurate it is!

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