Last updated: October 3, 2026

Simple tools for better pet care

Free Pet Calculators

Nutrition, feeding, weight, growth and health calculators for dogs, cats and other pets.

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Browse calculator categories

Choose a category to open its complete calculator hub.

Nutrition Calculators

Estimate calories, energy needs and daily nutrition.

  • Calories
  • RER & MER
  • Food analysis
  • Pet nutrition
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Feeding Calculators

Work out portions and daily feeding amounts.

  • Dog feeding
  • Cat feeding
  • Kitten food
  • Portion planning
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Weight & Growth Calculators

Track healthy weight, growth and breed development.

  • Adult weight
  • Puppy growth
  • Kitten growth
  • Breed tools
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Weight Loss Calculators

Plan a safe path toward a healthier target weight.

  • Dog weight loss
  • Cat weight loss
  • Target weight
  • Calories
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Health & BMI Calculators

Check body condition, hydration and everyday health needs.

  • BMI & BCS
  • Water intake
  • Exercise
  • Quality of life
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Age Calculators

Convert pet years and estimate life expectancy.

  • Dog age
  • Cat age
  • Life expectancy
  • Life stages
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Cost Calculators

Estimate adoption and ongoing pet ownership costs.

  • Affordability
  • Hamster costs
  • Planning
  • Budgeting
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Transport Calculators

Plan pet transport, shipping and relocation costs.

  • Transport cost
  • Pet shipping
  • Relocation
  • Cross-country
View all

For dogs

Dog calculators

Plan meals, follow growth and check healthy weight through every stage of your dog’s life.

NutritionWeightFeedingPuppiesSenior dogsBreed tools
Dog Nutrition Calculator Daily calories and nutritional needs. Dog Feeding Calculator Work out how much food to give. Puppy Calorie Calculator Calories for healthy puppy growth. Senior Dog Calorie Calculator Adjusted needs for older dogs. Dog BMI / BCS Calculator Estimate body condition and weight range. RER & MER Calculator Calculate resting and maintenance energy. Browse the nutrition hub

For cats

Cat calculators

Make feeding, nutrition and healthy-weight decisions with tools designed around cats.

NutritionWeightFeedingKittensFood analysisBreed tools
Cat Nutrition Calculator Daily calories and nutritional needs. Cat Feeding Calculator Calculate an appropriate daily portion. Kitten Calorie Calculator Calories for kittens as they grow. Cat BMI / BCS Calculator Estimate body condition and healthy weight. Cat Food Carb Calculator Estimate dry-matter carbohydrates from a label. Maine Coon Food Calculator Feeding guidance for Maine Coon cats. Browse the nutrition hub

Breed guides

Weight & feeding guides by breed

View all breeds
Dachshund weight and feeding guide Dachshund Labrador weight and feeding guide Labrador German Shepherd weight and feeding guide German Shepherd Golden Retriever weight and feeding guide Golden Retriever Pomeranian weight and feeding guide Pomeranian Yorkshire Terrier weight and feeding guide Yorkshire Terrier Boxer weight and feeding guide Boxer Shih Tzu weight and feeding guide Shih Tzu Corgi weight and feeding guide Corgi Husky weight and feeding guide Husky

Beyond cats & dogs

Calculators for every pet

Explore focused tools for birds, reptiles, fish, small mammals and exotic pets.

Bird calculators Nutrition and incubation tools Reptile calculators Nutrition and weight tools Fish calculators Aquarium nutrition tools Small pet calculators Rabbits, guinea pigs and more Exotic pet calculators Nutrition for uncommon companions Chicken coop calculator Plan coop size and check usable space All calculators Browse the complete calculator library

Clear, quick guidance

How our pet calculators work

  1. 1

    Enter your pet’s details

    Add weight, age, activity level and other relevant information.

  2. 2

    Get your result

    The calculator gives you an instant estimate based on your answers.

  3. 3

    Use it as a guide

    Use the result for planning, alongside advice from your veterinarian.

Our calculators provide estimates and do not replace professional veterinary advice.