The maths, with your numbers
No guesswork and no brand chart. This is the same calculation a vet does on paper, so you can check it.
What this means for the bowl
Purina Pro Plan Adult Large Breed Chicken & Rice is one of the more calorie-dense dry dog foods we track: at 407 kcal per cup it has more energy than 71% of the 140 dry dog foods in our list. You will pour less of it than you might expect.
To show how much the food matters: a 40 lb spayed or neutered dog needs about 985 kcal a day. That is 2 ⅜ cups of this food, but 1 ⅞ cups of Purina Pro Plan All Ages Sport Performance 30/20 Salmon & Rice and 3 ⅝ cups of Kirkland Signature Healthy Weight Chicken and Vegetable. Same dog, same day, very different scoops.
A level 8 oz measuring cup holds about 106 g of this kibble. If you have kitchen scales, weighing is more accurate than scooping, because a heaped cup holds noticeably more than a level one.
Purina Pro Plan Adult Large Breed Chicken & Rice feeding chart
Daily amounts for healthy adult dogs with no treats, from the label calories and the AAHA 2021 energy factors. Split the amount into meals.
| Weight | Couch dog | Spayed or neutered | Very active |
|---|---|---|---|
| 5 lb 2.3 kg | ⅜ cup41 g | ½ cup54 g | ⅝ cup68 g |
| 10 lb 4.5 kg | ⅝ cup68 g | ⅞ cup91 g | 1 ⅛ cups114 g |
| 15 lb 6.8 kg | ⅞ cup93 g | 1 ⅛ cups123 g | 1 ½ cups154 g |
| 20 lb 9.1 kg | 1 ⅛ cups115 g | 1 ½ cups153 g | 1 ¾ cups191 g |
| 30 lb 13.6 kg | 1 ½ cups156 g | 2 cups208 g | 2 ⅜ cups259 g |
| 40 lb 18.1 kg | 1 ⅞ cups193 g | 2 ⅜ cups258 g | 3 cups322 g |
| 50 lb 22.7 kg | 2 ⅛ cups228 g | 2 ⅞ cups304 g | 3 ⅝ cups381 g |
| 60 lb 27.2 kg | 2 ½ cups262 g | 3 ¼ cups349 g | 4 ⅛ cups436 g |
| 70 lb 31.8 kg | 2 ¾ cups294 g | 3 ⅝ cups392 g | 4 ⅝ cups490 g |
| 80 lb 36.3 kg | 3 cups325 g | 4 ⅛ cups433 g | 5 ⅛ cups541 g |
| 90 lb 40.8 kg | 3 ⅜ cups355 g | 4 ½ cups473 g | 5 ½ cups591 g |
| 100 lb 45.4 kg | 3 ⅝ cups384 g | 4 ¾ cups512 g | 6 cups640 g |
Label values: 407 kcal per cup, 3,823 kcal per kg. Source: purina.com, checked 18 Oct 2026.
Questions
How much Purina Pro Plan Adult Large Breed Chicken & Rice should I feed a 50 lb dog?
About 2 ⅞ cups or 304 g a day for a spayed or neutered dog, before treats. That is 1,164 kcal a day divided by the food’s label value. Use the calculator above to adjust for your pet.
How many calories are in Purina Pro Plan Adult Large Breed Chicken & Rice?
The label states 407 kcal per cup, 3,823 kcal per kg (checked 18 Oct 2026). Recipes change, so check your bag.
More from Purina Pro Plan
- Adult Sensitive Skin & Stomach Salmon & Rice
- Puppy Sensitive Skin & Stomach Salmon & Rice
- Puppy Chicken & Rice
- Adult Complete Essentials Shredded Blend Chicken & Rice with Probiotics
- Adult Toy Breed Chicken & Rice
- Weight Management Chicken and Rice
- Adult 7+ Shredded Blend Chicken & Rice Large Breed Senior
- Complete Essentials Adult Chicken & Rice Entrée Classic
- Sensitive Skin & Stomach Salmon & Rice Entrée Classic
- Puppy Sensitive Skin & Stomach Salmon & Rice Entrée Classic