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
Orijen Fit & Trim Grain-Free sits in the middle of the 140 dry dog foods we track, at 401 kcal per cup.
To show how much the food matters: a 40 lb spayed or neutered dog needs about 985 kcal a day. That is 2 ½ 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 115 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.
This is a weight-control recipe. If your dog needs to slim down, tick “Needs to lose weight” in the calculator and enter the target weight your vet gave you; the portion is then worked out for the target, not the current weight.
Orijen Fit & Trim Grain-Free 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 cup44 g | ½ cup59 g | ⅝ cup74 g |
| 10 lb 4.5 kg | ⅝ cup75 g | ⅞ cup100 g | 1 ⅛ cups125 g |
| 15 lb 6.8 kg | ⅞ cup101 g | 1 ⅛ cups135 g | 1 ½ cups169 g |
| 20 lb 9.1 kg | 1 ⅛ cups126 g | 1 ½ cups168 g | 1 ⅞ cups210 g |
| 30 lb 13.6 kg | 1 ½ cups171 g | 2 cups227 g | 2 ½ cups284 g |
| 40 lb 18.1 kg | 1 ⅞ cups212 g | 2 ½ cups282 g | 3 ⅛ cups353 g |
| 50 lb 22.7 kg | 2 ⅛ cups250 g | 2 ⅞ cups334 g | 3 ⅝ cups417 g |
| 60 lb 27.2 kg | 2 ½ cups287 g | 3 ⅜ cups382 g | 4 ⅛ cups478 g |
| 70 lb 31.8 kg | 2 ¾ cups322 g | 3 ¾ cups429 g | 4 ⅝ cups537 g |
| 80 lb 36.3 kg | 3 ⅛ cups356 g | 4 ⅛ cups474 g | 5 ⅛ cups593 g |
| 90 lb 40.8 kg | 3 ⅜ cups389 g | 4 ½ cups518 g | 5 ⅝ cups648 g |
| 100 lb 45.4 kg | 3 ⅝ cups421 g | 4 ⅞ cups561 g | 6 ⅛ cups701 g |
Label values: 401 kcal per cup, 3,490 kcal per kg. Source: 1800petmeds.com, checked 18 Oct 2026.
Questions
How much Orijen Fit & Trim Grain-Free should I feed a 50 lb dog?
About 2 ⅞ cups or 334 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 Orijen Fit & Trim Grain-Free?
The label states 401 kcal per cup, 3,490 kcal per kg (checked 18 Oct 2026). Recipes change, so check your bag.