How much to feed a dog
Vets size a dog's food from its resting energy requirement (RER = 70 × weight in kg to the power 0.75), then multiply by a factor for life stage and activity. A neutered adult is around 1.6× resting; puppies and very active dogs need far more; seniors and dogs losing weight need less.
From calories to grams
Bags of dog food list calories per 100 g (or per cup). Dividing the daily calories by that density gives the grams to serve. Because foods vary a lot, entering your specific food's figure makes the portion accurate rather than generic.
Split it and adjust
Serve the daily amount across two meals for most adults, more often for puppies. Watch your dog's body condition over a few weeks and nudge the amount up or down — the calculator is a starting point, not a fixed rule.
Note: a general estimate, not veterinary advice. Confirm portions and health with your vet.
Frequently asked questions
Where do I find kcal per 100 g?
On the food's packaging or the maker's website, often listed as metabolizable energy. Enter that number for an accurate portion.
Puppy or adult factor?
Puppies need much more energy per kilo than adults. Use the puppy option while growing, then switch to adult.
How much should I feed my dog?
It depends on weight, age and activity. Packaging gives a daily gram range by weight; the tool estimates it and you adjust to keep the dog at a healthy shape.
How many times a day should a dog eat?
Most adult dogs do well on two meals a day. Puppies need more frequent meals — often three or four — because they eat less at a time.
How do I know if I'm feeding too much?
Watch the dog's body, not just the bowl: you should feel the ribs easily and see a waist from above. Weight gain means it's time to cut back.