All Breeds › Chihuahua
Predict your Chihuahua's adult weight using veterinary growth data
| Male Adult Weight | 3–6 lbs |
| Female Adult Weight | 3–6 lbs |
| Male Height | 5–8 inches |
| Female Height | 5–8 inches |
| Life Expectancy | 14–16 years |
| Size Category | toy |
| AKC Group | Toy |
| Full Grown By | ~8 months (36 weeks) |
Enter your puppy's age and current weight for a personalized prediction.
Open CalculatorExpected weight at key ages based on veterinary growth data for toy-sized breeds.
| Age | % Adult Weight | Male Est. | Female Est. |
|---|---|---|---|
| 8 weeks | 31% | ~2 lbs | ~2 lbs |
| 12 weeks | 44% | ~2 lbs | ~2 lbs |
| 5 months | 71% | ~4 lbs | ~4 lbs |
| 6 months | 88% | ~4 lbs | ~4 lbs |
| 8 months | 100% | ~5 lbs | ~5 lbs |
| Adult | 100% | 3–6 lbs | 3–6 lbs |
Most Chihuahuas reach their adult weight by around 8 months (36 weeks).
As a toy-sized breed, your Chihuahua reaches adult size by 8-10 months. Smaller breeds tend to reach full size faster than larger breeds.
Individual dogs may reach full size slightly earlier or later. Spayed or neutered puppies may also have slightly different growth timelines. Regular vet checkups are the best way to track your Chihuahua's progress.
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Because Chihuahuas are a toy-sized breed, look for a small breed puppy food designed for their growth needs. Smaller kibble, higher calorie density.
Feed puppy-specific food until your Chihuahua reaches adult size (around 8 months), then transition to an adult formula over 7–10 days.
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For a toy-sized breed like the Chihuahua, a 22-inch crate (fits dogs up to ~12 lbs) is the right adult size. Buy the adult size from the start and use the included divider panel while your puppy is still growing.