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
Hill's Science Plan Light Adult is on the lighter side: at 821 kcal per kg it has less energy than 80% of the 21 wet dog foods in our list, so the bowl will look fuller for the same calories.
To show how much the food matters: a 18 kg spayed or neutered dog needs about 979 kcal a day. That is 3 ¼ × 370 g tin of this food, but 1 ¾ × 390 g carton of Skinner's Puppy & Junior Chicken & Garden Veg and 13 × 100 g pouch of Pedigree Adult Pouches Mixed Selection in Gravy. Same dog, same day, very different bowls.
Wet food is mostly water. Gram for gram, the average dry dog food in our list has about 4.5 times the calories of this one, which is why the wet portion looks so much bigger.
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.
Hill's Science Plan Light Adult 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 |
|---|---|---|---|
| 2 kg | ½ × 370 g tin172 g | ½ × 370 g tin229 g | ¾ × 370 g tin287 g |
| 5 kg | 1 × 370 g tin342 g | 1 ¼ × 370 g tin456 g | 1 ½ × 370 g tin570 g |
| 10 kg | 1 ½ × 370 g tin575 g | 2 × 370 g tin767 g | 2 ½ × 370 g tin959 g |
| 15 kg | 2 × 370 g tin780 g | 2 ¾ × 370 g tin1,040 g | 3 ½ × 370 g tin1,300 g |
| 20 kg | 2 ½ × 370 g tin968 g | 3 ½ × 370 g tin1,290 g | 4 ¼ × 370 g tin1,613 g |
| 25 kg | 3 × 370 g tin1,144 g | 4 × 370 g tin1,525 g | 5 ¼ × 370 g tin1,907 g |
| 30 kg | 3 ½ × 370 g tin1,312 g | 4 ¾ × 370 g tin1,749 g | 6 × 370 g tin2,186 g |
| 35 kg | 4 × 370 g tin1,472 g | 5 ¼ × 370 g tin1,963 g | 6 ¾ × 370 g tin2,454 g |
| 40 kg | 4 ½ × 370 g tin1,627 g | 5 ¾ × 370 g tin2,170 g | 7 ¼ × 370 g tin2,712 g |
| 45 kg | 4 ¾ × 370 g tin1,778 g | 6 ½ × 370 g tin2,370 g | 8 × 370 g tin2,963 g |
Label values: 821 kcal per kg, 303.8 kcal per 370 g tin. Source: hillspet.co.uk, checked 18 Oct 2026.
Questions
How much Hill's Science Plan Light Adult should I feed a 25 kg dog?
About 4 × 370 g tin or 1,525 g a day for a spayed or neutered dog, before treats. That is 1,252 kcal a day divided by the food’s label value. Use the calculator above to adjust for your pet.
How many calories are in Hill's Science Plan Light Adult?
The label states 821 kcal per kg, 303.8 kcal per 370 g tin (checked 18 Oct 2026). Recipes change, so check your bag.