Pet Weight & BMI Checker
Professional-grade assessment using breed standards and Body Condition Score (BCS) logic.
1Pet Information
2Visual Confirmation (BCS)
Vet Tip
"Always feel your pet. Weight alone doesn't show muscle mass or fat distribution."
📉
Enter Breed & Weight
to unlock analysis
Why BMI alone isn't enough for pets.
Human BMI is a height-to-weight ratio. Since pets vary drastically in bone structure and breed standards, veterinarians use the **Body Condition Score (BCS)**. Our calculation uses your breed's scientific weight range combined with your hands-on rib palpation to give a truly accurate picture of health.
- ✓Standardised breed weight data (50+ breeds)
- ✓Visual tuck and rib palpation integration
- ✓Species-specific metabolism factors
- ✓Metric and Imperial support
Free Downloads
Need a pet document?
Free contracts, health records, vaccination forms & more — no signup needed.
The End-to-End Solution
Go Beyond The Browser.
Download the Hushku App.
While our web tools provide quick insights, the full Hushku experience — including localised playmate matching, paperless adoption, and emergency GPS recovery — is only available in our all-in-one mobile app.
Get the Full ExperienceThe standard human BMI formula is not appropriate for pets — a dog's healthy weight depends on breed, sex, and frame size. This tool uses Body Condition Score (BCS), the system recommended by the World Small Animal Veterinary Association (WSAVA), combined with breed size norms to assess whether your pet is underweight, ideal, overweight, or obese. Over 60% of US dogs and cats are currently overweight according to APOP 2024 data — and the majority of their owners believe their pet is at a healthy weight.
Frequently Asked Questions
How do I know if my dog is overweight?
Use the Body Condition Score (BCS) system. At ideal weight (BCS 4–5 on a 1–9 scale): you can feel ribs easily with light pressure but cannot see them; there is a visible waist when viewed from above; the abdomen tucks up when viewed from the side. Overweight (BCS 6–7): ribs require firm pressure to feel; waist is barely visible or absent; little or no abdominal tuck. Obese (BCS 8–9): ribs cannot be felt; prominent fat deposits over spine and base of tail; no waist visible; pendulous abdomen.
What health problems are caused by obesity in pets?
Canine and feline obesity is associated with shortened lifespan (studies show obese dogs live 1.8 years less on average than ideal-weight dogs), osteoarthritis and joint inflammation, type 2 diabetes (particularly in cats), cardiovascular disease, respiratory compromise (especially in brachycephalic breeds), increased anaesthetic risk, hepatic lipidosis in cats, increased cancer risk, and urinary tract disease. The Association for Pet Obesity Prevention notes that even modest weight reduction — 10–15% of body weight — produces measurable improvement in mobility and quality of life in arthritic dogs.
How much should I reduce my pet's food to help them lose weight?
A safe weight loss rate for dogs is approximately 1–2% of body weight per week; for cats, 0.5–1% per week. This typically requires feeding approximately 70–80% of the maintenance caloric requirement. Do not restrict calories below 60% of RER without veterinary supervision — rapid restriction in cats risks hepatic lipidosis, a potentially fatal liver condition triggered by fat mobilisation during caloric restriction. Switching to a high-protein, lower-calorie food formulation is often more sustainable than reducing portions of a calorie-dense food.
Is it normal for a cat to be chubby?
No — despite being culturally normalised, obesity in cats is a serious health condition. The term 'fat cat' and the prevalence of overweight cats on social media have contributed to owner perception that a heavy cat is normal or cute. A healthy adult cat typically weighs 3.5–5.5 kg depending on frame. A 6–7 kg cat is overweight; an 8+ kg cat is obese. Common causes include indoor sedentary lifestyle, ad-lib dry food feeding, and neutering (which reduces metabolic rate by approximately 20–25%).