Free calculators, any brand
How much should you feed your dog or cat?
A neutered or quiet 35 lb (15.9 kg) dog needs about 756 kcal a day, which is 210 g (2 1/8 cups) of a 3,600 kcal/kg kibble; an indoor 8.8 lb (4 kg) cat about 226 kcal, 60 g of kibble or 2.5 pouches. The calculators start from the NRC 2006 equations behind the WSAVA feeding charts and turn your pet's calories into grams, cups, pouches and cans of the food you actually buy, plus what it costs per month. No brand list, no sign-up: type the numbers from your bag.
How much to feed a dog or cat a day
Adults on the calculators' defaults: dogs inactive or neutered (95 x kg^0.75) in the middle of each AKC size band, the cat indoor (130 x kg^0.4). Dry food at 3,600 kcal/kg (360 kcal per cup) for dogs and 3,800 kcal/kg (380 kcal per cup) for cats; wet food in 350 kcal cans and 90 kcal pouches. Your own food and pet go in the calculators below.
| Pet | kcal a day | Dry food | Or wet food |
|---|---|---|---|
| Small dog, 10 lb (4.5 kg) | 295 | 82 g (7/8 cup) | 0.8 cans |
| Medium dog, 35 lb (15.9 kg) | 756 | 210 g (2 1/8 cups) | 2.2 cans |
| Large dog, 75 lb (34 kg) | 1,338 | 372 g (3 3/4 cups) | 3.8 cans |
| Cat, 8.8 lb (4 kg) | 226 | 60 g (5/8 cup) | 2.5 pouches |
The calculators
Dog food calculator
Calories, grams and cups a day for any kibble or can, by weight, life stage and activity.
Cat food calculator
Wet and dry portions per day and per meal, pouches or cans plus grams, kittens included.
Pet food cost calculator
Cost per day, per month and per 1,000 kcal from your bag, and a fair comparison of two foods.
Dog and cat age calculator
Dog years to human years two ways (AKC rule, epigenetic clock), and cat years.
Feeding more than one animal? Pro prints the plan.
Breeders, sitters, shelters and multi-pet homes get one printable feeding plan per animal: grams and cups per meal, the bag figures, the vet notes, saved as PDF.
See ProWhere the numbers come from
Every result starts from the resting energy requirement (70 x kg^0.75, Merck Veterinary Manual) and the 2006 National Research Council maintenance equations that the WSAVA feeding charts are built on: 95-130 kcal x kg^0.75 for adult dogs, 100 x kg^0.67 or 130 x kg^0.4 for adult cats, a growth equation for puppies and per-kilogram bands for kittens. Weight loss follows the 2021 AAHA guidelines (at or below RER for the target weight).
Grams, cups and pouches come from the calorie statement printed on your own food, so the calculators work for any brand and for both US (kcal per cup) and EU (kcal per 100 g) labels. Individual animals need up to 30% more or less than any formula: the result is a starting point to adjust with your vet, not a prescription.