Cat Weight & Body Condition Score

Most domestic cats should weigh between 3.5–5.5 kg. Use body condition score alongside the scale to get the most accurate picture of your cat's health.

Cat's current weight (kg)

Sex

Body condition (feel the ribs)

📊

Enter your cat's weight and body condition score for a personalised assessment.

Weigh your cat at home. A digital kitchen scale works perfectly for most cats — weigh yourself holding the cat, then subtract your weight.

View Scales →

Related Calculators

Healthy Weight Range for Cats

Most domestic cats (non-pedigree) have an ideal weight of 3.5–5.5 kg, with males naturally larger than females. However, some breeds deviate significantly — Maine Coons can reach 8–10 kg in good condition, while Singapuras may be healthy at 2.5 kg. Body Condition Score (BCS) is therefore more useful than weight alone.

Feline obesity is very common — an estimated 50% of UK cats are overweight or obese. Even mild obesity increases risk of diabetes, joint disease, urinary problems and reduces life expectancy by up to 2 years. Cats should never be crash dieted — rapid weight loss (over 2% per week) causes hepatic lipidosis, a potentially fatal liver condition.

Stand above your cat and look down: at ideal weight you should see a visible waist behind the ribs. From the side, there should be a slight abdominal tuck. Run your hands along the ribs: at ideal weight you can feel each rib with slight pressure but they're covered with a thin layer of fat. If ribs are invisible and there's a pendulous belly, your cat is overweight. If ribs and hip bones are visible or prominent, they're underweight.

No more than 0.5–1% of body weight per week — for a 6 kg cat, that's 30–60g per week maximum. Reduce calories by 20% maximum at a time. Weigh monthly. Never skip meals entirely — cats need regular food to prevent hepatic lipidosis. Use a measured, timed feeding approach rather than free feeding. Your vet can prescribe a calorie-controlled weight management diet for more significant weight loss.