Hill's Science Diet Dog Food Calculator
Same vet formula as every page on this site — with Hill's Science Diet's energy density pre-loaded so you skip the label maths. Edit the kcal field if your specific formula differs. Hill's splits its adult range into standard Science Diet and low-calorie Perfect Weight — two lines roughly 70 kcal/100 g apart.
Enter your dog's details
Hill's Adult formulas cluster near 360–370 kcal/100 g, while Perfect Weight drops to ~290–310 — the calculator defaults to 363; switch to your line's label number.
Independent tool: this calculator is not affiliated with or endorsed by Hill's Science Diet; trademarks belong to their owners. The 363 kcal/100 g default is a representative value for Adult 1–6 and Perfect Weight lines, taken from published label figures — formulas vary inside a brand, so enter your bag’s kcal/kg ÷ 10 for the exact number.
Hill's Science Diet portions by weight
| Dog weight | RER (resting) | Daily target | Food per day | Per meal (×2) |
|---|---|---|---|---|
| 3 kg · 7 lb | 160 kcal | 255 kcal | 63 g | 32 g |
| 5 kg · 11 lb | 234 kcal | 374 kcal | 93 g | 46 g |
| 8 kg · 18 lb | 333 kcal | 533 kcal | 132 g | 66 g |
| 10 kg · 22 lb | 394 kcal | 630 kcal | 156 g | 78 g |
| 15 kg · 33 lb | 534 kcal | 854 kcal | 212 g | 106 g |
| 20 kg · 44 lb | 662 kcal | 1,059 kcal | 263 g | 131 g |
| 25 kg · 55 lb | 783 kcal | 1,252 kcal | 310 g | 155 g |
| 30 kg · 66 lb | 897 kcal | 1,436 kcal | 356 g | 178 g |
| 35 kg · 77 lb | 1,007 kcal | 1,612 kcal | 400 g | 200 g |
| 40 kg · 88 lb | 1,113 kcal | 1,781 kcal | 442 g | 221 g |
| 50 kg · 110 lb | 1,316 kcal | 2,106 kcal | 522 g | 261 g |
| 60 kg · 132 lb | 1,509 kcal | 2,415 kcal | 599 g | 299 g |
Neutered adult on Hill's Science Diet at 363 kcal/100 g, 10% treat allowance removed, 2 meals.
How to use this calculator
Enter weight
Enter the dog's weight (use ideal weight for weight loss).
Select life stage and goal
Select the life stage and goal so the correct MER factor applies.
Enter food energy density
Enter the food's energy density (kcal per 100 g) from its label.
Read the daily portion
Read the daily portion in grams, split it across meals, and adjust by 10% every 2 weeks based on body condition.
Frequently asked
How much Hill's Science Diet for a 30 kg dog?
At 363 kcal/100 g, a neutered 30 kg dog eats ~356 g/day after treat allowance. On Perfect Weight (~300), the same calories are ~430 g — volume is the point of that line.
How many kcal in Hill's Perfect Weight?
Roughly 290–310 kcal/100 g depending on size line — high fibre and volume at deficit calories is the product's entire design.
How many cups of Hill's Science Diet is that per day?
About 2.6 cups at a typical 100 g cup — but cups vary by up to 40% between kibbles and scoops, which is why this page works in grams (263 g/day for a 20 kg neutered dog). Weigh once, and the cup question disappears.
Why does the Hill's Science Diet bag chart suggest a different amount?
Bag charts are printed for the average dog of each size and tend to run generous. This calculator uses your dog's actual weight and life stage against Hill's Science Diet's representative energy (363 kcal/100 g) — if your exact formula's label differs, enter its kcal/kg ÷ 10 and the portion rescales instantly.
Related calculators
Dog Calorie Calculator
RER & MER explained and calculated — resting vs daily energy, per life stage.
Dog Food Cost Calculator
Cost per day and month, and how long a bag really lasts.
Dog Food Calculator by Weight
Portions for every weight, 1 kg to 90 kg — table first, calculator second.
Popular breeds on this food
Daily portions for the breeds owners ask about most — same formula, each breed's mid-range weight: