Chihuahua Size & Weight Chart: How Big Do They Get?
Written for general planning, not medical advice — no one at Argos Paws is a veterinarian. If something is wrong with your dog right now, call your vet or the nearest emergency clinic.
Quick answer: A full-grown Chihuahua typically weighs 2-6 lb (0.9-2.7 kg) and stands 5-8 in (13-20 cm) tall at the shoulder. Most reach their adult size by around 9-10 months.
Photo: Bonnie van den Born, bonfoto.nl · CC BY-SA 3.0 · via Wikimedia Commons
Chihuahuas are the smallest recognized dog breed, big in personality despite their tiny frame. They are loyal companions that thrive on close contact with their owners and adapt well to small living spaces.
| Size category | Small |
|---|---|
| Typical adult weight | 2-6 lb (0.9-2.7 kg) |
| Height at the shoulder | 5-8 in (13-20 cm) |
| Full grown by | 9-10 months |
| Life expectancy | 14-16 years |
The breed standard caps weight at 6 lb.
Chihuahua weight chart by age (lb & kg)
Estimated weights for an average Chihuahua puppy, based on the typical growth curve for a small breed. Males usually track toward the top of each figure, females toward the bottom.
| Age | Weight (lb) | Weight (kg) |
|---|---|---|
| 2 months | ~1 lb | ~0.5 kg |
| 3 months | ~2 lb | ~0.9 kg |
| 4 months | ~3 lb | ~1.4 kg |
| 5 months | ~3 lb | ~1.4 kg |
| 6 months | ~4 lb | ~1.8 kg |
| 9-10 months (full grown) | 2-6 lb | 0.9-2.7 kg |
When does a Chihuahua stop growing?
As a small breed, Chihuahuas typically reach adult weight by around 9-10 months. Smaller breeds like the Chihuahua reach full height and fill out fairly close together, so growth tends to look "done" all at once.
Use the Puppy Weight Predictor below — it's pre-loaded with the Chihuahua's growth curve, so just enter your puppy's current weight and age.
Predict your Chihuahua's adult weight
Enter your puppy's current weight and age to get an estimate based on this breed's typical growth curve.
Open the Puppy Weight PredictorHow much does it cost to feed a Chihuahua?
A typical adult Chihuahua (4 lb, average activity) needs roughly 175 kcal/day — about 0.1 lb (0.4 cups) of dry kibble per day, which works out to around $6/month at typical kibble prices. Fresh or subscription-style food usually costs more, around $70/month for the same dog. These are population-level estimates — use the calculator below for a number based on your dog's actual weight and food type, or see the Chihuahua feeding chart for puppy amounts by month.
Estimate Chihuahua food costs
Pre-filled with this breed's typical adult weight — adjust activity level and food type to get your monthly estimate.
Open the Dog Food Cost CalculatorBrowse dog food sized for a Chihuahua
Compare dry, wet, and breed-specific formulas — filter by your dog's size and life stage to narrow it down.
Browse dog food on Amazon(affiliate link)How old is my Chihuahua in human years?
The old "×7" rule doesn't hold up — small breeds like the Chihuahua age at their own rate, not a generic one. Use the calculator below, pre-set to this breed's size.
Convert your Chihuahua's age
Pre-filled with this breed's size category for a more accurate human-year estimate than a flat multiplier.
Open the Chihuahua Age CalculatorCommon health considerations
- Patellar luxation (kneecap dislocation) is very common in this small breed.
- Dental disease is common due to their small jaw and crowded teeth.
- Hypoglycemia (low blood sugar) can occur in puppies and very small adults, especially if meals are skipped.
This is general breed-level information, not a diagnosis or a prediction for any individual dog. Talk to your vet about health screening and preventive care specific to your dog.
Is pet insurance worth it for a Chihuahua?
See a typical monthly premium for this breed and whether it would likely pay off against a major vet bill.
Chihuahua insurance costSimilar breeds
Based on energy level, living-space fit, and care needs, these breeds are closest to the Chihuahua:
Take our breed match quiz
Answer a few quick questions about your lifestyle and living space to see which breeds — not just the Chihuahua — actually fit best.
Take the Breed Match QuizFrequently asked questions
How much does a full-grown Chihuahua weigh?
A full-grown Chihuahua typically weighs 2-6 lb (0.9-2.7 kg), making it a small breed. Individual dogs vary within that range depending on sex, genetics, and body condition — use the Puppy Weight Predictor above for an estimate based on your specific puppy's current weight and age.
How tall is a full-grown Chihuahua?
A full-grown Chihuahua stands 5-8 in (13-20 cm) tall, measured at the shoulder (withers). The breed standard caps weight at 6 lb.
When does a Chihuahua stop growing?
As a small breed, Chihuahuas typically reach adult weight by around 9-10 months. Height typically levels off a bit before this; smaller breeds like this one fill out relatively quickly once they reach height.
Is a Chihuahua a good first dog?
It can work for a first-time owner who does their homework, but the Chihuahua isn't the automatic beginner-friendly pick either — read the exercise and grooming sections above before deciding.
How much exercise does a Chihuahua need?
Relatively little compared to most breeds. A couple of shorter walks a day is usually enough for a Chihuahua, though every dog still benefits from some daily activity.
Is a Chihuahua good with kids?
Not typically recommended for households with young children without an experienced handler involved — this is a breed where careful supervision and management matter more than usual.
How much grooming does a Chihuahua need?
About as wash-and-go as it gets. The Chihuahua needs minimal brushing and rarely requires professional grooming.