question on percentages
12-27-2012, 12:52 PM
#1
FitDay Member
Thread Starter
Join Date: Dec 2012
Posts: 1
question on percentages
quick math here tells me I have been off a little bit using the FitDay Pie charts. example is I am trying to use a 50/30/20 protein/carb/fat ratio and after some time now I typed in some numbers and the math didn't add up. 190 calories at 29/8/5 for this portion showed a 60/17/23 ratio which if using simple math shows that the percentages are not accurate. any thoughts?
12-28-2012, 04:14 AM
#2
Super Moderator
Join Date: Jan 2010
Posts: 2,225
What numbers would you be typing in? 29/8/5 can't be percentages for a portion because they would only add up to 42%. So I'm guessing those are grams.
If the numbers you have are for grams of protein/carb/fat, then 29*4=116,8*4=32, and 5*9=45. The calories add up to 193. This seems 'close enough' to me to 190, since I don't know what kind of rounding goes on during calculations in the background (done by fitday).
116 (protein) is 60% of calories
32 (carb) is 17% of calories
45 (fat ) is 23% of calories (behold the awesome caloric weight of the fat gram!)
If you explain how you got the 29/8/5 and how you typed it in, it might help.
If the numbers you have are for grams of protein/carb/fat, then 29*4=116,8*4=32, and 5*9=45. The calories add up to 193. This seems 'close enough' to me to 190, since I don't know what kind of rounding goes on during calculations in the background (done by fitday).
116 (protein) is 60% of calories
32 (carb) is 17% of calories
45 (fat ) is 23% of calories (behold the awesome caloric weight of the fat gram!)
If you explain how you got the 29/8/5 and how you typed it in, it might help.
03-18-2013, 10:30 AM
#3
FitDay Member
Join Date: Mar 2013
Posts: 2
I have been using FitDay for some months on and off now and just noticed this as well. In fact I came on the forums for the first time to start a topic about this same issue. But then I saw this thread.
Here is a screenshot:
Now, this particular food has
15.8 g fat
10.6 g carbs
23.6 g protein
How the hell does this translate to 51% fat? Over one half of the total!
Here is a screenshot:
Now, this particular food has
15.8 g fat
10.6 g carbs
23.6 g protein
How the hell does this translate to 51% fat? Over one half of the total!
03-18-2013, 06:31 PM
#4
FitDay Member
Join Date: Jun 2010
Location: San Diego, CA
Posts: 68
A gram of fat equals 9 calories, while a gram of protein or carbohydrates only equals 4 calories. That's why foods with a high fat content are much higher in calories. So if you were looking for an equal balance of macronutrients, for example, where your pie chart was 33.33% in all three areas, your ratio of FAT: PROTEIN: CARB would look like this--- 8g: 18g: 18g. If you're looking at the grams of macronutrients as equals, you'll come up extremely heavy on your fat intake. Hope that helps! 
