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How To Calculate How Many Cups?

daftcat75

TCS Member
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Sep 7, 2018
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Get yourself a food scale and do everything by weight. “Cups” is a measurement of volume that is inexact for solids. All cat food has a ME (metabolic energy) number that will tell you Kcal/Kg. If you divide that by 1000, you get calories per gram. Then you can weigh it all out in grams to know the calories you are feeding.

I use this one myself and you can probably get it for half this price off eBay.
https://www.walmart.com/ip/Optima-Scale-Ti-502-Sterling-Pocket-Jewellery-Scale/748968535?wmlspartner=wlpa&selectedSellerId=1131&adid=22222222227271431017&wl0=&wl1=g&wl2=t&wl3=327936775601&wl4=pla-617549638780&wl5=9032131&wl6=&wl7=&wl8=&wl9=pla&wl10=112562428&wl11=online&wl12=748968535&veh=sem&gclid=EAIaIQobChMIufK_4vjO5AIVIx6tBh33xwqxEAQYHCABEgL3ZPD_BwE
 

LTS3

TCS Member
Staff Member
Forum Helper
Aug 29, 2014
11,450
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USA
Take a 1 cup dry measuring cup (not a liquid cup) and place it on a scale. Tare the scale so that it reads zero. You don't want the weight of the cup to factor into the weight of the food. Then fill the measuring cup with food to the top. Now you now what 1 cup of food weighs, more or less. Then do some math to calculate out how many cups of food are in the bag.

Example: 10 lb bag of food. One cup of food measures 4 oz. 10 lbs is the same as 160 oz. 160 divided by 4 is 40. So 40 cups of food in the bag.
 
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mwallace056

TCS Member
Thread starter
Top Cat
Jan 3, 2015
1,758
340
Get yourself a food scale and do everything by weight. “Cups” is a measurement of volume that is inexact for solids. All cat food has a ME (metabolic energy) number that will tell you Kcal/Kg. If you divide that by 1000, you get calories per gram. Then you can weigh it all out in grams to know the calories you are feeding.

I use this one myself and you can probably get it for half this price off eBay.
https://www.walmart.com/ip/Optima-Scale-Ti-502-Sterling-Pocket-Jewellery-Scale/748968535?wmlspartner=wlpa&selectedSellerId=1131&adid=22222222227271431017&wl0=&wl1=g&wl2=t&wl3=327936775601&wl4=pla-617549638780&wl5=9032131&wl6=&wl7=&wl8=&wl9=pla&wl10=112562428&wl11=online&wl12=748968535&veh=sem&gclid=EAIaIQobChMIufK_4vjO5AIVIx6tBh33xwqxEAQYHCABEgL3ZPD_BwE
so does this both apply to both wet food and dry food? and let see i'm understanding this right, let say a dry food have 3,600 kcal/kg so i just divide that by 1000 to get 3.6 calories and 250 is the calories fed so 250/3.6 to get 69.44, so 69.44 is how many grams i feed a day?
 
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  • #5

mwallace056

TCS Member
Thread starter
Top Cat
Jan 3, 2015
1,758
340
Take a 1 cup dry measuring cup (not a liquid cup) and place it on a scale. Tare the scale so that it reads zero. You don't want the weight of the cup to factor into the weight of the food. Then fill the measuring cup with food to the top. Now you now what 1 cup of food weighs, more or less. Then do some math to calculate out how many cups of food are in the bag.

Example: 10 lb bag of food. One cup of food measures 4 oz. 10 lbs is the same as 160 oz. 160 divided by 4 is 40. So 40 cups of food in the bag.
Thank you.
 

daftcat75

TCS Member
Top Cat
Sep 7, 2018
3,463
4,375
so does this both apply to both wet food and dry food? and let see i'm understanding this right, let say a dry food have 3,600 kcal/kg so i just divide that by 1000 to get 3.6 calories and 250 is the calories fed so 250/3.6 to get 69.44, so 69.44 is how many grams i feed a day?
That’s correct!

I feed Krista wet food which is 1300 kcal/kg for 1.3 cal/g. To get that same 250 calories, I would need to feed her 250/1.3 = 192 g. There are approximately 28 g (28 and change) in an ounce. So that’s approximately 7 oz. krista can eat 1.5 oz in a meal. So she would need about 5 meals to get those calories.
 

Willowy

TCS Member
Top Cat
Mar 1, 2009
23,543
14,405
South Dakota
Most dry foods have around 4 cups per pounds, if you just want a rough estimate about how many servings are in a bag. If you need it to be more exact, yes, use the proper math.
 

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