Siamese Cat Weight Chart & Growth Guide
Track your Siamese cat's weight from kittenhood to adulthood with this complete age-by-age weight guide.
Track your Siamese Cat's weight in the free PetNoter app
4.8 · Free · Android & iOS
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) |
Is your Siamese Cat a healthy weight?
Enter your Siamese Cat's age and current weight to compare it against the range in the chart above.
Compare Siamese Cats against other breeds in the cat weight calculator →
These ranges are typical values for the breed, not a diagnosis. Individual healthy weight depends on frame, build and health history — ask your vet about your own pet.
You know the numbers. Now watch the trend.
A single weigh-in tells you very little — a chart of the last six months tells you everything. PetNoter keeps your Siamese Cat's weight history in one place, free.
- Log a weigh-in in seconds and see the trend line
- Reminders for weigh-ins, vaccinations and vet visits
- Vet records, prescriptions and photos stored per pet
4.8 average rating · no account needed to start
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.
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.
Frequently Asked Questions
Related Weight Charts
Track your Siamese Cat's weight in the free PetNoter app
4.8 · Free · Android & iOS