Chihuahua weight chart by age
The breed standard says the Chihuahua should not exceed 6 lb (2.7 kg). The chart below estimates what a puppy should weigh at each age on the way there, in pounds and kilograms. Enter your puppy's age to see the estimate.
1.8 kg.
Chihuahua weight by age
| Age | At the maximum (lb) | At the maximum (kg) |
|---|---|---|
| 8 weeks | 2.3 | 1.0 |
| 12 weeks | 3.2 | 1.5 |
| 16 weeks | 4.1 | 1.8 |
| 20 weeks | 4.7 | 2.2 |
| 24 weeks | 5.2 | 2.4 |
| 32 weeks | 5.7 | 2.6 |
| 40 weeks | 5.9 | 2.7 |
| 1 year | 6.0 | 2.7 |
| 15 months | 6.0 | 2.7 |
| 18 months | 6.0 | 2.7 |
The estimate shows a dog that will weigh the standard maximum (6 lb) as an adult. A smaller dog will weigh proportionally less at every age.
Chihuahua growth chart
The dots mark one year. Growth is fastest in the first months and slows after that.
How this estimate is made
Two sources are combined. The adult weight comes from the American Kennel Club breed standard for the Chihuahua, which says: "A well balanced little dog not to exceed 6 pounds." The shape of growth is the average curve of the toy breeds in a published study of puppies from 12 breeds (Papillon). We scaled that curve to the Chihuahua's standard adult weight. We did not find a published growth table measured on Chihuahuas, so these are estimates and not measurements for the breed. For a check on your own puppy, use the puppy size calculator and the body condition check.
Questions
How much should a Chihuahua puppy weigh at 8 weeks?
The estimate is about 2.3 lb (1.0 kg) for a dog that reaches the standard maximum.
How much should a Chihuahua puppy weigh at 16 weeks?
About 4.1 lb at the standard maximum.
How much does a full-grown Chihuahua weigh?
The breed standard says the Chihuahua should not exceed 6 lb (2.7 kg). Pet dogs are often heavier than the standard, so use body condition as the better check.
When is a Chihuahua fully grown?
The growth curve we used reaches about 99 percent of adult weight in the first year or a little later.
Is my Chihuahua overweight?
Use the body condition check. Weight alone cannot say.
How much should I feed my Chihuahua puppy?
See the puppy feeding chart.
Sources
- American Kennel Club, Chihuahua breed standard (weight), official PDF.
- Hawthorne A.J. et al., "Body-weight changes during growth in puppies of different breeds", Journal of Nutrition, 2004 (growth curves of the toy breeds).
Last reviewed 2026-10-26. This page is general information and not veterinary advice.