Hey guys, my study partner and also I were talking around the weight of a human leg for some reason. Us both estimated a foot to be roughly 20% that the total body weight.

You are watching: How much does a leg weigh

Google told us that legs are around 9% and arms 6% i m sorry left united state wondering if the trunk and head of the body could really it is in 70% the the mass of the whole body.

Any skilled estimaters want to take it a cracked at this?

Edit: http://www.fas.harvard.edu/~loebinfo/loebinfo/Proportions/humanfigure.htmlThis can help

Thanks in advance!

P. S. I'll provide the examine marks


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· 6y · edited 6y
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Okay, this could be means too convoluted a an approach but let's offer it a shot:

 

Average human body fat portion of a human being male = 24% sauce

Let's i think this is likewise true in the leg. Therefore 24% that our leg by weight is native fat.

 

I additionally assumed that the leg have the right to be taken into consideration a perfect cone (i don't recognize if cylinder would be better, but the tapering led me to choose cone).

So by the snapshot OP edited in, we have a radius that the cone come be roughly 5.5 inches, and also we have actually a elevation of 31 inches. I'll go ahead and also convert those here:

5.5 customs * 2.54cm = 13.97cm

31 inches * 2.54cm = 78.74cm

 

plug this right into our volume formula => V= (pir^2h)/3

=> V = (3.14*(13.972)*78.74)/3 = 16084.1cm3

We likewise know that 1cm3 = 1 mL

 

I more than likely should have done that earlier, yet let's now assume the bone is 40% of her leg by mass. This is the biggest assumption we've made together I can find no figures for the median bone volume in a leg.

 

I boiled it under to this last calculation:

(.24*.916083.1)+(.401.7516083.1)+(.361.06*16083.4) = 20.87kg

This appears really high, however let's power v this calculation anyway.

 

Average mass of a 5'9" human being is 148lbs / 2.20kg/lb = 67.13kg Sauce

 

=> percentage of body mass in one leg = 20.87kg/67.13kg = 31.1%

 

Again, this appears high, implying the our body is ~60% leg by mass.

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Edit: I'm noticing I actually calculated out the mass of a leg by analysis methods and also I traction the mean weight the a person off a website. Therefore I'm ultimately mixing empirical and analytical data which can be why we got such a huge number here.