Pet Weight Calculator – Dog & Cat Ideal Weight & BMI Calculator
Use our free pet weight calculator to determine your dog or cat's ideal weight range, body condition score (BCS), and BMI. Our dog weight calculator and cat weight calculator provide breed-specific recommendations to help you assess if your pet is at a healthy weight and get personalized weight management guidance.

Measure from ground to top of shoulder (withers)
BCS 5/9: Ideal - Ribs easily felt but not visible. Waist visible from above. Abdomen tucks up.
How Pet Weight Calculator Works
Our pet weight calculator uses body condition scoring (BCS) to determine your pet's ideal weight range. The BCS scale ranges from 1-9, with 5 being ideal. By entering your pet's current weight, body condition score, and optionally their breed, the calculator determines if your pet is underweight, ideal, overweight, or obese, and provides personalized recommendations.
Understanding Body Condition Score
Body Condition Score (BCS) is a standardized method used by veterinarians to assess body fat. A score of 1-3 indicates underweight, 4-5 is ideal, 6-7 is overweight, and 8-9 is obese. The calculator uses this score along with your pet's current weight to calculate the ideal weight range and BMI.
Frequently Asked Questions
How do I calculate my pet's ideal weight?
Use our pet weight calculator by entering your pet's current weight, body condition score (BCS), and optionally their breed. The calculator will determine the ideal weight range based on BCS and provide breed-specific recommendations if available.
What is a body condition score (BCS) for pets?
Body Condition Score (BCS) is a 9-point scale used to assess a pet's body fat. A score of 5 is ideal, with 1-3 indicating underweight, 4-5 ideal, 6-7 overweight, and 8-9 obese. It helps determine if your pet needs to gain or lose weight.
How accurate is the pet weight calculator?
The calculator provides estimates based on body condition scoring and breed averages. Individual pets may vary based on frame size, muscle mass, and health conditions. Always consult your veterinarian for accurate weight assessment and personalized recommendations.
What should I do if my pet is overweight?
If your pet is overweight, consult your veterinarian for a safe weight loss plan. Gradual weight loss (1-2% per week) is recommended. This typically involves reducing portions by 10-20%, increasing exercise, and potentially switching to a weight management diet.
Related Tools & Resources
Disclaimer: This calculator provides estimates based on body condition scoring. Individual pets may vary. Always consult with your veterinarian for accurate weight assessment and personalized recommendations, especially for pets with health conditions or specific needs.