PuppyGrowthHow dog food portions are calculated
Vets start with the Resting Energy Requirement (RER), the calories a dog burns at rest, then multiply it for life stage and activity to get the daily need.
Daily calories = RER × life-stage factor
Cups per day = Daily calories ÷ calories per cup
| Life stage | Factor |
|---|---|
| Puppy under 4 months | × 3.0 |
| Puppy 4 months to adult | × 2.0 |
| Neutered adult | × 1.6 |
| Intact adult | × 1.8 |
| Senior / inactive | × 1.4 |
| Weight loss | × 1.0 (of ideal weight) |
Find "kcal/cup" in the guaranteed analysis or feeding guide on your dog food bag. Calorie density varies a lot between brands, so the same number of cups can mean very different calories.
Frequently asked questions
How many cups of food should a 50 lb dog eat?
A neutered 50 lb (22.7 kg) adult needs about 1,150 kcal a day. With a food of 350 kcal per cup, that is about 3.3 cups a day.
Should I follow the bag or the calculator?
Both are starting points. Adjust based on your dog's body condition, weighing every few weeks.
How much should I feed a puppy?
Puppies need about two to three times their resting energy. Split it into 3–4 meals for young puppies.
More free pet calculators
PuppyGrowthCalc gives general estimates for healthy pets. Every animal is different. Ask your vet about your pet's ideal weight, diet and health.