Chihuahua puppy weight chart
The ranges below run from a puppy that will end up at the light end of the breed (2 lb) to one heading for the heavy end (6 lb). Males usually track the upper numbers and females the lower.
| Age | Weight (lb) | Weight (kg) | % of adult |
|---|---|---|---|
| 8 weeks | 0.6 to 1.7 | 0.3 to 0.8 | 28% |
| 10 weeks | 0.7 to 2.1 | 0.3 to 1 | 35% |
| 12 weeks | 0.8 to 2.5 | 0.4 to 1.1 | 42% |
| 14 weeks | 1 to 2.9 | 0.5 to 1.3 | 49% |
| 16 weeks | 1.1 to 3.4 | 0.5 to 1.5 | 56% |
| 5 months | 1.4 to 4.3 | 0.6 to 2 | 72% |
| 6 months | 1.6 to 4.9 | 0.7 to 2.2 | 81% |
| 7 months | 1.8 to 5.3 | 0.8 to 2.4 | 88% |
| 8 months | 1.9 to 5.6 | 0.9 to 2.5 | 94% |
| 9 months | 1.9 to 5.8 | 0.9 to 2.6 | 97% |
| 10 months | 2 to 5.9 | 0.9 to 2.7 | 99% |
| 12 months | 2 to 6 | 0.9 to 2.7 | 100% |
How Chihuahuas grow
The smallest breed, with a huge personality. As a toy breed, a Chihuahua is roughly half grown at about 16 weeks and reaches adult size at around 9 to 12 months. Tiny Chihuahua puppies can become hypoglycemic if they skip meals, so feed small meals often.
Small and medium puppies have fast metabolisms. Split their food into 3 or 4 meals a day until about 4 months old, then move to 2 or 3 meals.
Is my Chihuahua puppy underweight or overweight?
The scale only tells half the story. Check your puppy's body condition: you should be able to feel the ribs easily under a thin layer of fat, and see a waist when you look down from above. A puppy that tracks low on the chart but has good energy and body condition is usually just going to be a smaller adult. Talk to your vet if your puppy stops gaining for more than two weeks, loses weight, or has persistent diarrhea.
Frequently asked questions
How big will my Chihuahua puppy get?
Most Chihuahuas finish at 2 to 6 lb. Enter your puppy’s age and weight in the calculator above for a personal estimate.
When does a Chihuahua stop growing?
Most Chihuahuas reach adult height and weight at around 9 to 12 months.
How much should a Chihuahua puppy weigh at 12 weeks?
Usually around 0.8 to 2.5 lb, which is about 42% of adult weight. Lighter or heavier can still be normal if your vet is happy with your puppy’s body condition.