Shih Tzu Weight & Calorie Guide
Quick Answer
A healthy adult Shih Tzu weighs 4–7 kg (8.8–15.4 lbs), according to the AKC breed standard. Puppies reach 50% of adult weight by 4–5 months and full weight by 9–10 months.
Source: AKC breed standard, WSAVA nutrition guidelines
Quick Facts
Ideal Weight Range
Puppy Weight Predictor
For puppies under 12 months. Enter your puppy's current weight and age to predict adult weight.
How the puppy weight predictor works
This predictor uses growth milestone data from Salt et al. (2017), published in Veterinary Record, which tracked the weight development of dogs across five size categories from birth to adulthood. By comparing your puppy's current weight against the expected growth percentage for their age and size category, we estimate their adult weight range.
Factors that affect adult weight
Genetics play the largest role, but nutrition, neutering status, and overall health also influence growth rate. Puppies fed excessive calories during rapid growth phases may exceed their genetic weight potential, while underfed puppies may not reach it. Large and giant breeds grow more slowly than toy and small breeds, reaching full size at 18–24 months rather than 10–12 months.
Data source: Salt et al. (2017) "Growth patterns of commercial kennel dogs" Veterinary Record • AKC breed standards
Shih Tzu Health & Weight Management
Shih Tzu are cheerful, outgoing toy dogs with a luxurious flowing coat and a proud, aristocratic carriage. Originally bred as companions for Chinese royalty, they are affectionate lap dogs with surprising spunk. Their brachycephalic (flat-faced) anatomy makes breathing inherently difficult, and any extra weight dramatically worsens brachycephalic obstructive airway syndrome (BOAS) — even modest overweight can push a Shih Tzu into dangerous respiratory distress, especially in warm weather. Patellar luxation and progressive retinal atrophy are also breed concerns; excess body fat compounds joint stress and reduces overall mobility.
Exercise: 20–30 minutes of gentle daily exercise — short walks and indoor play sessions. Avoid hot or humid weather entirely; Shih Tzu overheat rapidly due to their flat faces. Keep walks leisurely and let your Shih Tzu set the pace. Indoor fetch and gentle training games provide good mental stimulation without overexertion.
Feeding tips: Shih Tzu are eager eaters with a compact frame — even an extra teaspoon of kibble per meal adds up to significant caloric surplus. Measure every portion with a kitchen scale. Split meals into two small daily feedings. Use low-calorie treats like tiny carrot pieces, and brush teeth regularly since dental disease is rampant in the breed.
Keeping your Shih Tzu at a lean 9–16 lbs (4–7 kg) is critical for breathing ease, joint comfort, and eye health. Use PawScale's calorie calculator for Shih Tzu to determine exact daily intake, check body condition with our BCS assessment tool, and build a balanced meal plan with the feeding guide.
Data source: AKC breed standard • Last updated: 2026-08-19
Is your Shih Tzu at a healthy weight?
59% of dogs are overweight — can you tell? Take our free 2-minute Body Condition Score assessment.
Shih Tzu Calorie Calculator
Calculate daily calorie needs in 3 steps
Frequently Asked Questions
How much should a Shih Tzu weigh?
The ideal weight for a Shih Tzu is 4–7 kg (8.8–15.4 lbs). Even a small weight gain can be significant for smaller breeds. Use our calorie calculator above to get personalized feeding recommendations.
How many calories does a Shih Tzu need per day?
A typical adult Shih Tzu weighing 6 kg needs approximately 402–503 kcal per day, depending on activity level and whether they are neutered. Use our breed-specific calculator above for an exact number based on your dog's details.
Is my Shih Tzu overweight?
59% of dogs are overweight, and most owners cannot tell just by looking. Check your Shih Tzu's Body Condition Score (BCS) — if you can't easily feel their ribs or they have no visible waist from above, they may be overweight. Take our free 2-minute BCS assessment above to find out.
When does a Shih Tzu reach full adult weight?
Shih Tzu puppies reach 50% of their adult weight by 4–5 months and typically reach full adult weight by 9–10 months, according to AKC growth guidelines. Small breeds mature faster than large breeds.
What size crate does a Shih Tzu need?
A Shih Tzu typically needs a 24-inch crate based on breed size. Use PawScale's free crate size calculator for a personalized recommendation.
References & data sources
1. AKC Official Breed Standard — Shih Tzu. akc.org
2. Salt C, et al. “Estimating the expected growth of dogs.” Vet Record, 2017;180(15):376.
3. National Research Council. Nutrient Requirements of Dogs and Cats. National Academies Press, 2006.
4. Laflamme DP. “Development and validation of a body condition score system for dogs.” Canine Practice, 1997;22(4):10–15.
5. WSAVA Global Nutrition Guidelines; Association for Pet Obesity Prevention (APOP) 9-point BCS scale.
Last reviewed: September 2026
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