Cat Size Calculator
Find your cat’s size category and ideal weight range
Current Weight (lbs)
Breed
Sex
Age
Understanding Cat Size: What’s Normal?
“Cat size” is relative. A 12 lb Maine Coon may be perfectly healthy while a 12 lb Siamese would be obese. Our cat size calculator accounts for breed, sex, and age to give you a personalised size assessment and daily calorie target.
Cat Size Guide by Breed Category
| Size Category | Breeds | Female | Male |
|---|---|---|---|
| Small | Siamese, Devon Rex, Singapura | 5-8 lbs | 6-10 lbs |
| Medium | Domestic shorthair, British Shorthair | 7-10 lbs | 9-13 lbs |
| Large | Maine Coon, Ragdoll, Norwegian Forest | 10-15 lbs | 12-18 lbs |
FAQs
What is considered a large cat?
Cats over 12 lbs for females or 15 lbs for males of medium breeds are generally considered large. For large breeds like Maine Coons, up to 18 lbs is normal. Always compare against breed-specific ranges.
Is my cat big or just fat?
Check the body condition score: can you feel the ribs easily? Is there a visible waist when viewed from above? If not, your cat may be overweight rather than naturally large. Use our cat weight calculator for a full assessment.
How do I know if my cat is the right size?
Compare their weight to the breed-specific healthy range above, check BCS, and consult your vet. If you suspect a weight issue, our cat weight loss calculator can build a safe plan.
Conclusion
Size matters in feline health — but only when compared to the right benchmark. Use our cat size calculator to assess your cat correctly. Pair it with our cat calorie calculator for daily targets and our cat age calculator to understand how size needs change with age.
What size is your cat? Share in the comments!