Dog Food Calculator by Weight
Short answer
Feeding scales with body weight through RER = 70 × (weight in kg)^0.75. The chart below shows daily calories and cups by weight for a neutered adult on a 350 kcal/cup food; enter your dog’s exact weight for its own numbers.
Calories per cup is on your food’s bag (usually 300–500 kcal/cup). Adjust it for an accurate cups-per-day figure.
Your dog needs about 794 calories a day, roughly 2.3 cups.
Daily calories
794 kcal
Cups per day
2.3
Resting need (RER)
496 kcal
Per meal (×2)
1.1 cups
Each meal
1.1 cups (397 kcal) × 2 meals a day
Based on 350 kcal per cup — check your food’s label and adjust above.
Estimate only, from the RER = 70 × kg^0.75 formula with a life-stage factor. Confirm the right amount with your veterinarian and adjust to your dog’s body condition.
Consult your vet
These figures are planning estimates from the standard RER/MER formula and are not a substitute for veterinary advice. Your dog’s real needs depend on breed, body condition, health, and the specific food. Confirm the right amount with your veterinarian and adjust based on your dog’s body condition over time.
Dog food chart — calories & cups by weight
Daily calories and cups for a neutered adult dog on a 350 kcal/cup food. Puppies, intact, and working dogs need more; use the calculator above for your dog’s exact numbers.
| Weight (lb) | Weight (kg) | RER (kcal) | Daily calories | Cups/day |
|---|---|---|---|---|
| 5 | 2.3 | 129 | 207 | 0.6 |
| 10 | 4.5 | 218 | 348 | 1 |
| 20 | 9.1 | 366 | 585 | 1.7 |
| 30 | 13.6 | 496 | 794 | 2.3 |
| 40 | 18.1 | 615 | 985 | 2.8 |
| 50 | 22.7 | 727 | 1,164 | 3.3 |
| 60 | 27.2 | 834 | 1,335 | 3.8 |
| 80 | 36.3 | 1,035 | 1,656 | 4.7 |
| 100 | 45.4 | 1,223 | 1,958 | 5.6 |
Related
Frequently asked questions
How much should I feed a dog by weight?
Daily calories are RER (70 × kg^0.75) × a life-stage factor. A 10 lb dog needs roughly 230 kcal, a 50 lb dog about 1,350 kcal, and a 100 lb dog about 2,270 kcal for a neutered adult — see the chart and calculator above for cups.
Why don’t bag charts match this calculator?
Bag charts are generic ranges by weight. This tool uses the vet RER/MER formula and your food’s actual calories per cup, so it can be more precise — but always fine-tune by watching your dog’s body condition.