Siamese Cat Weight Chart & Growth Guide
Track your Siamese cat's weight from kittenhood to adulthood with this complete age-by-age weight guide.
About the Siamese Cat
The Siamese is one of the oldest and most recognizable cat breeds in the world, originating in Thailand (formerly Siam). Known for their striking blue eyes, pointed coloring (darker ears, face, paws, and tail against a lighter body), and distinctively vocal nature, Siamese cats are highly social and intelligent companions.
Siamese are lean, athletic cats with a long, tubular body and fine bones. They are naturally slender, and a healthy Siamese should feel muscular rather than bony. Their active, playful nature helps them maintain a healthy weight naturally when given sufficient stimulation.
While Siamese are not as obesity-prone as some breeds, spayed or neutered cats may gain weight without dietary adjustment. Their lean build means weight changes are very visible, and even modest gain can be noticeable and concerning.
Siamese Cat Weight Chart by Age
Adult Siamese cats typically weigh 3–5 kg (6.6–11 lbs). Males are usually larger than females.
| Age | Weight |
|---|---|
| 8 weeks | 0.4–0.7 kg (0.9–1.5 lbs) |
| 3 months | 0.9–1.4 kg (2–3 lbs) |
| 6 months | 1.8–2.7 kg (4–6 lbs) |
| 9 months | 2.3–3.5 kg (5–7.7 lbs) |
| 12 months | 2.7–4 kg (6–8.8 lbs) |
| Adult (1.5+ yrs) | 3–5 kg (6.6–11 lbs) |
Keeping Your Siamese at a Healthy Weight
- Feed measured portions twice daily — Siamese can overeat if food is always available.
- After spaying or neutering, reduce food intake by about 20–25% to compensate for metabolic slowdown.
- Provide interactive toys and puzzle feeders to satisfy their high intelligence needs.
- Siamese thrive with a feline companion — having another cat to play with helps maintain activity levels.
- Weigh monthly; their lean frame makes a 200–300 g gain very noticeable and worth addressing.
- Ribs should be easily felt but not visibly prominent from a normal standing position.
Track Your Siamese's Weight with PetNoter
Log weigh-ins, set reminders for vet checkups, and store all your Siamese cat's health records in one free app.