Bred for companionship, the Shih Tzu is an affectionate, outgoing, and happy little dog.
Shih Tzu Size Predictor
Enter your puppy's current parameters below to calculate expected adult size, height, and lifespan.
Estimated Adult Weight
--lbs
Expected Range: -- - --lbs
Growth Progress0% Fully Grown
📏Max Height--
🐾Size Category--
❤️Est. Lifespan--
Future Gear Sizing Guide
Collar Size--
Crate Size--
Note: This is a highly educated estimate based on veterinary growth curves. Genetics, diet, and spay/neuter timing can influence final statistics.
About Shih Tzu Growth
Shih Tzus reach their skeletal maturity quickly, usually around 10 months, but may gain a small amount of muscle until 12 months.
Size Categorytoy
Avg Male Weight9 - 16 lbs
Avg Female Weight9 - 16 lbs
Puppy Growth Chart by Breed Size
Track your puppy's development milestones from 3 months to adulthood across all major size categories.
Age
Toy
Small
Medium
Large
Giant
3 months
2-4 lbs
6-10 lbs
12-20 lbs
25-35 lbs
35-45 lbs
6 months
4-8 lbs
12-18 lbs
25-40 lbs
45-60 lbs
60-80 lbs
Adult (1-2 yrs)
5-12 lbs
15-22 lbs
30-55 lbs
60-95 lbs
100-150 lbs
Other Growth-Influencing Factors
While breed genetics set the foundation for your puppy's ultimate size, several environmental factors play a crucial role in their development:
Nutrition: A balanced, age-appropriate diet is vital. Overfeeding can lead to rapid growth and joint problems, while underfeeding stunts development.
Genetics: Mixed breeds inherit a combination of traits. Looking at the size of the parents (especially the mother) provides strong clues.
Spaying/Neutering: Fixing your puppy before they reach full maturity can slightly alter the closure of their growth plates, sometimes resulting in a taller dog.
Health & Parasites: Severe intestinal parasites or chronic illness during puppyhood can impede calorie absorption and stunt growth.
Frequently Asked Questions
Answers to the most common questions about puppy growth and adult size prediction.
When do toy breeds finish growing? ↓
Toy breeds like Yorkies, Toy Poodles, and Shih Tzus mature extremely fast. They generally reach their full adult weight by 8 to 10 months of age.
Are toy breed puppy calculators accurate? ↓
Because toy breeds stop growing early, standard puppy weight formulas designed for larger dogs can over-estimate their adult weight. Our calculator uses a specialized curve for small sizes.
Is this puppy weight calculator 100% accurate? ↓
No calculator can be 100% accurate. A puppy's adult weight is influenced by genetics, diet, and health. Our calculator provides a highly educated estimate based on established veterinary growth curves.
How is the adult weight estimated? ↓
We use standard growth formulas based on age (in weeks or months) and current weight. For most dogs, weight at 14-16 weeks is roughly half of their final adult weight.
Curious about puppy growth stages?
Learn more about how puppies grow, when they stop growing, and what to expect during their development phases.
