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Dog Feeding Calculator · How Much Should I Feed My Dog?

The feeding chart on a bag of dog food is a starting guess for an average dog. The right amount for yours depends on its weight, its age, whether it is spayed or neutered and how active it is, and veterinarians work it out in calories. This calculator does the same: it finds your dog's resting energy from its weight, multiplies it by a factor for its life stage and turns the calories into cups of dry food or cans of wet food using the numbers on your food label.
Enter the weight in pounds, choose the life stage and the type of food, and type the calories per cup or per can from the label. If you mix dry and wet food, set what share of the calories comes from wet food. By default 10% of the calories is set aside for treats, which is the limit most vets suggest, and the rest is meal food. You also get the number of meals a day, the amount per meal and a rough figure for the water your dog needs.
Treat the result as a starting point. Weigh your dog every few weeks, run a hand over its ribs and adjust the amount by about 10% if it gains or loses weight. Ask your veterinarian about a goal weight for an overweight dog, about puppies under four months and about working, pregnant or nursing dogs, who can need much more food than this calculator estimates. A dog with a medical condition needs a diet and amounts set by a vet.
For a weight-loss plan, enter the goal weight and not the current weight
On the bag, in the calorie content. Most dog kibble has 300 to 450 kcal per cup
Vets recommend keeping treats under 10% of the daily calories
Weight:
Life stage:
Food:

Detailed Breakdown

10 metrics
PRIMARY RESULT
2.36 cups of dry food
Daily Food
Calories per Day
985 kcal
Resting Energy (RER)
615 kcal
Life-Stage Factor
1.6 × resting energy (Adult, spayed or neutered)
Calories From Food
886 kcal
Treat Allowance
98 kcal (10% of the day)
Dry Food per Day
2.36 cups
Dry Food per Meal (2 Meals)
1.18 cups
Meals per Day
2 meals
Water Needed per Day
About 40 fl oz from drinking and wet food

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When to Use This Calculator

Everyday financial situations where this tool gives you fast, accurate clarity:

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Feed an Adult Dog

Get the cups or cans for a spayed or neutered adult from its weight.

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Feed a Growing Puppy

See the higher calories a puppy needs and the number of meals.

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Plan Weight Loss

Use the goal weight and the weight-loss factor to set a lower daily amount.

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Mix Dry and Wet Food

Split the calories between kibble and cans and see each amount.

Calculation Formula

Standard Method

Weight in kilograms = Pounds ÷ 2.2046 Resting energy (RER) = 70 × Weight in kg^0.75, in kcal a day Daily calories = RER × Life-stage factor Food calories = Daily calories × (1 − Treat share) Dry food (cups) = Food calories × Dry share ÷ kcal per cup Wet food (cans) = Food calories × Wet share ÷ kcal per can Per meal = Daily amount ÷ Number of meals Water ≈ 1 fluid ounce per pound of body weight a day, from drinking and from wet food Life-stage factors from the AAHA Nutrition and Weight Management Guidelines (2021): spayed or neutered adult 1.6, intact adult 1.8, less active or prone to weight gain 1.2 to 1.4 (1.3 here), weight loss 1.0 (applied to the goal weight), puppy from 4 months to adult 2.0, puppy under 4 months 3.0. They are general guidelines, and working or sporting dogs can need 2 to 5 times resting energy.

Benchmark Example:
A neutered adult dog that weighs 40 pounds, eats kibble at 375 kcal per cup and gets 10% of its calories from treats: • Weight: 40 ÷ 2.2046 = 18.14 kg • Resting energy: 70 × 18.14^0.75 = 615 kcal • Daily calories: 615 × 1.6 = 985 kcal • Treats: 10% = 98 kcal; food: 886 kcal • Dry food: 886 ÷ 375 = 2.36 cups a day, or 1.18 cups at each of 2 meals With 13 oz cans at 400 kcal each, the same dog needs 2.22 cans a day. Half dry and half wet is 1.18 cups of kibble plus 1.11 cans. If the dog is overweight and its goal weight is 40 pounds, the factor drops to 1.0 and the daily calories to 615 kcal, which is 1.48 cups of kibble after treats.

Frequently Asked Questions

7 answers

Applicable Laws & Regulatory Standards

American Animal Hospital Association, AAFCO & National Research Council

Official Legal Reference
AAHA Nutrition and Weight Management Guidelines for Dogs and Cats (2021)

Give the resting energy formula and the life-stage factors used here for neutered and intact adults, less active dogs, weight loss and growth, and recommend adjusting the amount with the dog's weight and body condition.

AAFCO Model Pet Food Regulations, PF9 — Statement of Calorie Content

Sets how the calories of a pet food are stated on the label, such as kcal per cup or per can, the numbers you enter in this calculator.

National Research Council, Nutrient Requirements of Dogs and Cats (2006)

The scientific reference for the energy and nutrient needs of dogs at each life stage, behind the daily calorie estimates.

Legal citations and statutes are provided for consumer transparency, analytical validation, and educational reference under U.S. consumer financial regulations. This tool is not a substitute for formal legal, accounting, or tax counsel.

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