Free tool by Omelo
Is my dog or cat overweight? Estimate your pet's body condition and ideal-weight range in 30 seconds.
Is your pet
a healthy weight?
Select your pet type to begin the check.
Quick answer
On the 9-point WSAVA Body Condition Score, 4 to 5 is ideal, 6 to 7 is overweight, and 8 to 9 is obese. Each point above 5 means roughly 10% over ideal body weight, so a dog at a body condition score of 7 is carrying about 20% more than its ideal weight. To check at home, feel the ribs, look for a waist from above, and look for a belly tuck from the side. This free calculator estimates the score from those three checks and gives a rough ideal-weight range in kg and lb. Reviewed by Dr. Ashim Sarkar, BVSc & AH.
How this calculator works
This tool uses the Body Condition Score (BCS) system from the WSAVA Global Nutrition Committee. Instead of comparing your pet to a breed weight chart, it scores body fat by feel and shape, which is how vets actually judge weight. The 9-point scale runs from 1 (emaciated) to 9 (grossly obese), and 4 to 5 is the ideal.
You answer three checks: how easily you can feel the ribs, whether there is a waist when you look from above, and whether the belly tucks up when you look from the side. The tool combines those into an estimated score, weighting the rib check most because it is the most reliable. It then applies the WSAVA rule of thumb that each point above the ideal of 5 is about 10% over ideal body weight, so the ideal weight is your pet's current weight divided by that percentage.
Reading the score
Underweight (BCS 1 to 3): Ribs, spine, and hip bones are easy to see with little or no fat. Worth a vet check for parasites, dental pain, or illness.
Ideal (BCS 4 to 5): Ribs are easy to feel under a thin fat cover, there is a clear waist from above, and a slight belly tuck from the side.
Overweight (BCS 6 to 7): You have to press to feel the ribs, the waist is hard to see, and the belly runs level. Roughly 10 to 20% over ideal weight.
Obese (BCS 8 to 9): Ribs are hard to find under thick fat, no waist, and the belly may sag. Roughly 30% or more over ideal, and worth a vet-supervised plan.
Why weight matters so much
Extra weight is linked to joint disease, diabetes, breathing problems, and a shorter life. The hard part is that weight creeps up slowly, so a few extra pounds are easy to miss when you see your pet every day. A body condition check every month catches the drift early, while it is still easy to fix.
A note for cats
Many cats have a small loose flap of skin in front of the back legs, called the primordial pouch. It is normal and is not the same as belly fat, so judge body condition by feeling over the ribs rather than by the pouch. Never crash-diet an overweight cat. Losing weight too fast can trigger hepatic lipidosis, a serious liver condition, so cats should lose weight slowly under a vet's guidance.
Frequently asked questions
How do I know if my dog or cat is overweight?+
Use a Body Condition Score. Feel the ribs, look for a waist from above, and check for a belly tuck from the side. If you have to press hard to feel the ribs, the waist is gone, and the belly hangs level or sags, your pet is likely overweight. On the 9-point WSAVA scale, 4 to 5 is ideal, 6 to 7 is overweight, and 8 to 9 is obese.
What is a Body Condition Score (BCS)?+
A Body Condition Score is a standardised way vets judge body fat by feel and shape rather than weight alone. The WSAVA 9-point scale runs from 1 (emaciated) to 9 (grossly obese), with 4 to 5 as the ideal. It works for any breed because it looks at the individual animal, not a breed weight chart.
What is the ideal body condition score for a dog or cat?+
The ideal Body Condition Score is 4 to 5 out of 9. At that score you can feel the ribs with a thin fat cover, see a waist from above, and see a slight belly tuck from the side. A score of 5 out of 9 is the target for most healthy adult dogs and cats.
How much over ideal weight is my pet if the BCS is high?+
As a rough guide, each point above 5 on the 9-point scale is about 10% over ideal body weight. So a dog at a body condition score of 7 is carrying roughly 20% more than its ideal weight, and a score of 8 is roughly 30% over. This calculator uses that rule to estimate an ideal-weight range from your pet's current weight.
Can I calculate my pet's ideal weight at home?+
Yes, as an estimate. Weigh your pet, then score its body condition using the rib, waist, and belly-tuck checks in this tool. Each point above the ideal of 5 represents roughly 10% over ideal weight, so the ideal weight is the current weight divided by that percentage. It is an estimate, not a diagnosis. Your vet can confirm the target and rule out medical causes.
My pet is overweight. What should I do?+
Ask your vet to confirm the target weight and check for medical causes. Then measure meals with a scale, cut treats to under 10% of daily calories, and add gentle activity. Aim for slow loss of about 1 to 2% of body weight per week. Do not crash-diet a cat, because rapid weight loss can trigger a dangerous liver condition called hepatic lipidosis.
Source: WSAVA Global Nutrition Committee, Body Condition Score (9-point) charts for dogs and cats. This tool gives estimates for general guidance only and is not a substitute for veterinary care. Reviewed by Dr. Ashim Sarkar, BVSc & AH.