PetEntire

PetEntire helps pet owners with practical pet care guides, health information, and easy-to-use tools for dogs and cats covering weight, nutrition, exercise, and overall wellness.

EXPLORE GUIDES

Free educational tool

Dog & Cat BMI Calculator

Estimate your pet's body condition, target weight range and daily calorie needs. This is a screening tool, not a veterinary diagnosis.

What type of pet do you have?
Tell us about your pet

Sex *
Is your pet neutered / spayed? *

Breed is informational only and is never used on its own to decide a healthy weight.

Weight & measurements
Weight unit

Switching the unit converts the value you already entered (1 kg = 2.20462 lb).

kg

Measurements are optional and only used for the reference BMI-style number.

Body condition check

Run your hands gently over your pet and answer the four questions below. This mirrors the hands-on Body Condition Score (BCS) method used in veterinary practice.

1. How easily can you feel your pet's ribs? *
2. How visible is your pet's waist when viewed from above? *
3. How does your pet's abdomen look from the side? *
4. How much fat covering do you feel over the ribs? *
Activity & goal
What is your goal? *
Results

Body Condition Score guide (1–9)

  1. 1/9 Extremely underconditioned
  2. 2/9 Very underweight
  3. 3/9 Underweight
  4. 4/9 Lean / ideal
  5. 5/9 Ideal
  6. 6/9 Slightly overweight
  7. 7/9 Overweight
  8. 8/9 Obese
  9. 9/9 Severely obese

Approximately 4–5 out of 9 is generally considered ideal. This is an educational estimate; a veterinarian can provide a more accurate assessment.

My pets & weight tracking

Saved pets and weight records are stored only in this browser. Nothing is sent to this website or to any third party, and you can delete any entry at any time.

Important

Disclaimer: This calculator is intended for educational and informational purposes only. It does not provide a veterinary diagnosis and should not replace professional veterinary advice. Healthy weight varies between individual pets based on factors such as breed, age, body frame, muscle mass, activity level and health status. Consult a qualified veterinarian for an accurate assessment and personalized nutrition or weight-management plan.

HOW IT WORKS

How to Use PetEntire BMI Calculator

Get your pet’s BMI and health insights in simple steps. Our pet BMI calculator for dogs and cats is fast, easy, and accurate.

01. Select Your Pet Type

Choose whether you want to calculate BMI for your Dog or Cat to get started.

02. Enter Basic Information

Add your pet’s name, age, and sex. This helps us provide a personalized health assessment.

03. Select Your Pet’s Breed

Choose the correct breed. For mixed breeds, select the closest match.

04. Enter Current Weight

Enter your pet’s most recent weight for accurate BMI and weight status.

05. Answer About Body Condition

Tell us about your pet’s body condition and activity level for better results.

06. Set Your Pet Health Goals

Choose your goal, maintain healthy weight, lose weight, gain weight, or improve overall wellness.

07. Review Your PetEntire BMI Results

Get your pet’s estimated BMI, weight status, and personalized recommendations.

What You Get After Results

Nutrition Guidance

Personalized diet and feeding recommendations for your pet.

Exercise Plan

Activity suggestions to keep your pet fit and healthy.

Weight Control Tips

Practical tips to maintain or achieve a healthy weight.

Better Overall Health

Support your pet’s long-term wellness and happiness.

Why Use PetEntire BMI Calculator?

The PetEntire BMI Calculator is a simple, free tool that helps you understand your pet's weight and overall body condition in seconds. A Chihuahua and a Great Dane can't be measured by the same standard — and neither can a Siamese and a Maine Coon. That's why the PetEntire BMI Calculator works as a pet BMI calculator by breed, age, and size, tailoring its estimate to the animal in front of you. Use it to monitor pet weight, spot early signs of weight gain or weight loss, and build healthier habits around pet nutrition, feeding, and exercise — always alongside your pet's overall health and professional veterinary advice when needed.

Check Your Pet's Healthy Weight

The PetEntire BMI Calculator gives you a quick starting point to see whether your pet is underweight, within a healthy weight range, or overweight.

Understand Your Pet's Body Condition

Weight is only part of the picture. A full body condition score also considers breed, age, body shape, muscle mass, and activity level.

Monitor Your Pet's Weight Over Time

The PetEntire BMI Calculator gives you a quick starting point to see whether your pet is underweight, within a healthy weight range, or overweight.

Support Healthy Weight Management

Pair the calculator with proper portions, a balanced pet diet, and daily activity to support long-term pet weight management.

Improve Pet Nutrition and Feeding Habits

The PetEntire BMI Calculator encourages closer attention to pet nutrition, feeding portions, and your pet's daily nutritional needs.

Encourage Regular Exercise and Fitness

The PetEntire BMI Calculator fits naturally into a broader pet wellness routine. Regular pet exercise supports healthy weight, mobility, and overall pet fitness.

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