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Thread: Best online Body Fat Calculator? page

  1. #1
    it1958's Avatar
    it1958 is offline Senior Member
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    Best online Body Fat Calculator?

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    I've looked at two different body fat calculators online and have gotten two very different BF %.

    Is there on you suggest?

    one i looked at is the one suggested in Mark's book (http://www.bmi-calculator.net/body-fat-calculator/)

    and this is the other one: http://www.free-body-fat-calculator.com/calcbf.php


    not only am I working on my own stats, but also my sister.

    She is 5'9" tall, weighs 250. Her waist and hips both are 56". Most calculations are telling me she has 85-ish# LBM. for 250#, i find that to be way lower than i anticipated. she is inactive, however.

    The same calculator is telling me i have 53# LBM, which I find hard to accept. My body comp has definitely changed in the past 2 yrs. At the YMCA, I was measured with calipers and came out at 18% (which i think was VERY generous!!!!). My LBM was 111. I am now about 12# heavier and have had to really cut back on my strength training so i do understand that i have lost muscle but that i went from 111 to 53?

    Thanks for your input and sharing!

  2. #2
    Meg-a-Tron's Avatar
    Meg-a-Tron is offline Senior Member
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    Neither is very accurate, the first one is too high, the second too low haha (I know my body fat %)

    http://www.linear-software.com/online.html

    Is the closest online calculator I've found. Of course it's even more helpful if you have at least a few caliper measurements (taken by someone who knows how to use them haha)
    Stats: 5'6" female, 21 years young
    Starting Weight: 187 lbs (March 2010)
    Current Weight: 143 lbs (Oct 2011)
    Goal BF: 20%

    Super D Omega 3 daily & BCAAs preworkout

  3. #3
    paleo_rob's Avatar
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    Most online calculators are bunk, but thats OK because you want to look at relative change. So just stick to one calculator and record your BF. Even if you don't get the correct BF% you will get the correct (or close to) BF% change.

  4. #4
    it1958's Avatar
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    Thanks to both of you for your response. paleo_rob, I understand that I want to just use these as a tool and follow the trend. But I wanted to access my sister's (and to confirm my thoughts for myself, too) so I knew where to start her on protein.

    I believed that a heavier person would have a lot of muscle in order to carry the bulk around, so I am surprised (even with this latest link) to find them stating she has about 85# LBM.

    ETA - I also discovered the mistake I made on my own... When i multiplied actual weight times body fat %, I forgot to subtract to find LMB...

    Perhaps I should start a new thread (or look around here more) to find suggestions on calipers, as I've seen many suggest getting a pair to check yourself (tho I can't imagine that is an easy task!)...

  5. #5
    paleo_rob's Avatar
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    You can find some good calipers on Ebay for quite cheap these days. Some of the digital ones use the Jackson/Pollock 3-point method which is fairly accurate and good enough for what you want.

  6. #6
    Meg-a-Tron's Avatar
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    Calipers are a good cheap method, but completely worthless if you do them yourself unfortunately. Most gyms will do bf% testing for free (tape measure/tanita/caliper combo)

    Just keep getting tested at regular intervals, and good luck.
    Stats: 5'6" female, 21 years young
    Starting Weight: 187 lbs (March 2010)
    Current Weight: 143 lbs (Oct 2011)
    Goal BF: 20%

    Super D Omega 3 daily & BCAAs preworkout

  7. #7
    NutMeg's Avatar
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    http://www.healthcentral.com/cholest...-2774-143.html

    I use this one and it seems to be fairly accurate for me. I was measured in a BodPod about a year ago and this one was only about 2 percentage points off from that. Other ones, like the linear link that was shared was 10+ percentage points off for me. The one I linked may be particularly better for your sister because it includes calf, thigh and wrist measurement. I find as a person with most of my weight in my belly, others are falsely high. I did one of the others, that didn't include the leg and arm measurements and it put me at 39% body fat. There is no way that is right, I am 28% by impedance and according to the link above about 26%. While those are not 100% accurate either, I think they are closer to the truth than 39% (you can follow my links to see pictures of me )

  8. #8
    Kakes's Avatar
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    Quote Originally Posted by NutMeg View Post
    Home Body Fat Test

    I use this one and it seems to be fairly accurate for me.
    Okay this one is more like it! All the others are about 10+ percentage points off like you said. They place me in a borderline obese range. Ha! I am clearly not obese. Not that I put a huge amount of stock in online calculators, but this one seems to be more accurate.
    You don't have to be sick to get better.
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