PawCalcHub

Pet nutrition & feeding tools

Free Pet Nutrition Calculators & Feeding Tools

Work out how much to feed your dog or cat. Estimate daily calories, portion sizes, water needs and what’s really in a pet food label, for puppies, kittens, adults and seniors.

Dog Nutrition Calculators Cat Nutrition Calculators
  • Free, no sign-up
  • Formulas shown on every tool
  • Dogs & cats only

Quick preview

Daily Calorie Estimates for Dogs and Cats

PawCalcHub estimates a starting daily calorie target from resting energy (RER = 70 × weight in kg0.75) multiplied by a life-stage factor. Here are two illustrative examples; open the full calculator to enter your own pet’s details.

Dog example

75 lb neutered adult: about 1,580 kcal/day

RER × 1.6 for a typical neutered adult dog. Needs vary with age, activity and body condition.

Open the Dog Calorie Calculator Cat example

10 lb neutered adult: about 260 kcal/day

RER × 1.2 for a typical neutered adult cat. Weigh regularly and adjust with your vet.

Open the Cat Calorie Calculator

Examples are illustrative estimates, not individualized veterinary advice. Talk to your veterinarian about your pet’s needs.

Most used

Popular Feeding Calculators

The tools pet parents use most to plan meals and portions.

Dog

Dog Food Calculator

Turn your dog’s calorie needs into cups or grams of their actual food.

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Dog Calorie Calculator

Estimate daily calories from weight, age, activity and neuter status.

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Cat Food Calculator

Work out daily portions of wet, dry or mixed food for your cat.

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Cat Calorie Calculator

Estimate your cat’s daily calorie needs based on weight, life stage and profile.

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Puppy Feeding Calculator

Plan daily food and meals per day for a growing puppy.

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Kitten Feeding Calculator

Estimate how much and how often to feed a kitten as it grows.

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Dog RER Calculator

Find your dog’s Resting Energy Requirement, the base of every calorie formula.

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Cat RER Calculator

Calculate your cat’s Resting Energy Requirement from body weight.

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For dogs & puppies

Dog Nutrition Calculators

Every feeding tool for dogs in one place, from puppy growth to weight loss and treats.

Explore Dog Nutrition

For cats & kittens

Cat Nutrition Calculators

Feeding tools built for cats, from kitten growth to weight management and hydration.

Explore Cat Nutrition

Read the label

Pet Food Analysis Tools

Pet food labels list nutrients “as fed”, which includes water. That makes wet and dry foods hard to compare. These tools convert label numbers so you can compare foods fairly.

Example: a wet cat food
Nutrient
As fed
Dry matter
Moisture
78%
n/a
Protein
11%
50%
Fat
5%
22.7%

Dry matter % = as-fed % ÷ (100 − moisture %) × 100

Dry Matter Calculator

Remove moisture from label values to compare wet and dry foods.

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Pet Food Carb Calculator

Estimate carbohydrate content, which most labels don’t list.

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Calorie Density Calculator

Estimate calories per kg, per cup or per can from the analysis.

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Protein Calculator

See protein on a dry-matter and per-calorie basis.

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Calcium-to-Phosphorus Calculator

Check the Ca:P ratio of a food or home-prepared recipe.

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Transparent methods

How Our Calculators Work

We want you to see exactly where each number comes from, so you can check it and talk it through with your vet.

Enter your pet’s details

Weight, life stage, activity and, on food tools, the numbers from your pet food label.

We apply published formulas

Calculations use formulas and factors from veterinary nutrition references, run in your browser.

Use it as a starting point

Feed the estimate, weigh your pet regularly, and adjust with your vet based on body condition.

  • Formulas shown. Each calculator explains its method and lists its references.
  • Estimates, not diagnoses. Health conditions, medications and pregnancy all change nutrition needs.
  • Private by design. Your inputs stay in your browser and aren’t saved.
  • Focused on feeding. Only dog and cat nutrition, nothing else.

Main references: Merck Veterinary Manual; Pet Nutrition Alliance; Today’s Veterinary Nurse. See the calorie methodology above.

Questions

Pet Feeding FAQ

How many calories does my dog or cat need per day?
It depends mainly on body weight, life stage, activity and whether your pet is neutered. A common starting point is the Resting Energy Requirement (70 × body weight in kg0.75) multiplied by a life-stage factor. For example, a neutered adult dog is often estimated at 1.6 × RER and a neutered adult cat at 1.2 × RER. Try the calculator above for your pet.
What is RER in pet nutrition?
RER stands for Resting Energy Requirement: the calories a pet needs at rest for basic body functions. It is the base number that daily feeding estimates are built from.
How do I convert calories into cups or grams of food?
Divide your pet’s daily calorie estimate by the calorie content of the food, which is usually printed on the bag or can as kcal per cup, per can or per kg. Our food calculators do this for you.
Are these calculators accurate for every pet?
No calculator fits every pet. Individual metabolism can vary widely, so results are educational starting estimates. Monitor your pet’s weight and body condition and adjust with your veterinarian.
Should puppies and kittens be fed differently?
Yes. Growing pets need more energy per kg than adults. Common growth factors are 3.0 × RER for puppies under 4 months, 2.0 × RER from 4 months to adulthood, and 2.5 × RER for kittens. They are usually fed several smaller meals a day.
Why compare pet foods on a dry matter basis?
Wet food can be around 75–80% water, so its label percentages look low next to dry food. Removing the water (dry matter basis) lets you compare protein, fat and other nutrients fairly.

Find the right feeding tool for your pet

Pick your pet to see every nutrition calculator for dogs or cats.

Dog Nutrition Calculators Cat Nutrition Calculators

PawCalcHub provides free educational estimates for dog and cat nutrition. Results are not veterinary advice, diagnosis or treatment. Always consult your veterinarian before changing your pet’s diet, especially for pets that are pregnant, nursing, underweight, overweight or have a health condition.