Fat Track Gold
 04222007, 12:10 PM
Fat Track Gold
I have had these digital calipers for a while now. I still can't get a consistant measurement using these. Thats why I prefer the mirror. Anyway, there is a booklet that came with it that is called "Improve Your Measuring Skill". It has a section called "Determine your ideal weight with the desired bodfat percentage"
The example is this,
Assume you have the following data:
Body fat percentage: 24.5
Body Weight: 165 pounds
Desired body fat percentage: 20
Your ideal weight can be determined as follows:
(100current bodyfat%)/(100 Desired bodyfat %)XCurrent Weight
=(10024.5)/(10020)x165
=155.7 pounds
I can not figure out how they came out with 155.7!!!!
I want to figure out mine. I have no need to be super lean and for me 10% bodyfat would be spectacular. Even 14% would be great!. So if I was to get to 10% what would be my ideal bodyweight?
I am at 18% bodyfat, guessing by my several trys with this product!. I have had it for about 5 years!. I don't really trust it, but I want to figure out this math problem. So my current weight is 232 at 18% bodyfat, 5'10", not that my height matters, I just thought I would throw that in...Can anyone help me figure this out?  04222007, 01:49 PM
Anyone else as confused as me by this math formula?. Maybe some of the science nerds can help. I know there are few on here and they have to be good at figuring stuff like this out!

 04262007, 02:15 AM
TBone,
For what it's worth, I've heard that the spring used in those calipers is what causes consistency problems. I use a plastic AccuMeasure and have no problems getting consistent readings with that. As for the math problem:
I worked through it and came up with the same answer. Here's how:
They give the formula of:
(100current bodyfat%)/(100Desired bodyfat%)X Current weight.
With the values given of:
Current bodyfat% = 24.5
Desired bodyfat% = 20
Current weight = 165
You have to work in the parenthesis first.
so, the first parenthesis is:
(100current bodyfat%) which is:
(10024.5) this gives us: 75.5
The next parenthesis is:
(100Desired bodyfat%) which is:
(10020) this gives us: 80
OK, so now that you have those values, you can plug them in:
(100current bodyfat%)/(100Desired bodyfat%)X Current weight. Which works out to be:
75.5 divided by 80, multiplied by 165
75.5 divided by 80 = 0.94375
multiply 0.94375 by 165, and you get:
155.71875 or simply: 155.7
There you go, hope I broke it down for you easy to understand like.
Ok, let's try yours:
Current bodyfat% = 18
Desired bodyfat% = 10
Current weight = 232
(10018) divided by (10010) multiplied by 232
82 divided by 90 multiplied by 232
0.91111 multiplied by 232 = 211.37
or simply: 211.4
SOOOOOO, is that forumula useful/correct? I dunno, I'd have to look at my references, but I just wanted to chime in and help you with the math problem, because I HATE when I can't figure out how someone did something!
Hope that helps you out man, I'm tired from all the typing! lol
Lifting  04272007, 12:51 PM
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