puppy weight calculator
Estimate your puppy’s adult weight based on breed size, current age, and weight.
Puppy Weight Calculator — How Big Will My Puppy Get?
Wondering how big your puppy will grow? Our free puppy weight calculator gives you an accurate estimate of your dog’s adult size based on breed, current weight, age, and gender. Whether you just brought home a tiny Chihuahua puppy or a bouncy Labrador, this puppy growth calculator helps you plan ahead — from the right food portions to the correct collar size, bed, and exercise routine. Simply enter your puppy’s details above and get an instant adult weight prediction built on veterinary-backed growth data.
How Does the Puppy Weight Calculator Work?
This puppy weight estimator uses the percentage-of-adult-weight method, one of the most trusted approaches in veterinary science. The idea is simple: puppies of each size category reach predictable percentages of their adult weight at specific ages. By knowing your pup’s current weight and age in weeks, the calculator works backward to estimate their full-grown size.
The growth data behind this tool is based on AKC breed weight standards and validated puppy growth charts used widely by professional veterinarians. Our dog size calculator also complements this tool if you want to compare breed size categories and see how your pup measures up against standard breed dimensions.
Results may vary by ±10–20% depending on genetics, nutrition, and individual health. Always consult your vet for personalized guidance.
Puppy Growth Stages — From Newborn to Full Grown
Every puppy passes through distinct development phases. Understanding these stages helps you know what to expect week by week, and when to use the puppy growth chart most effectively.
Newborn to 8 Weeks — Rapid Early Growth Newborn puppies gain weight fast, often doubling their birth weight within the first 7 days. By 8 weeks, most puppies are strong enough to leave their mother. At this early stage, weight predictions are broad because growth is still very unpredictable.
2 to 6 Months — The Major Growth Spurt This is when you’ll notice the biggest physical changes. Legs lengthen, bodies fill out, and energy levels go through the roof. For small breeds, this period takes them close to their adult size. For large and giant breeds, they are still in the early half of their growth journey. This is the most reliable window for using a puppy size calculator to predict adult weight.
6 to 12 Months — Growth Begins to Slow By 6 months, small breeds are almost fully grown. Medium breeds are approaching their final size. Large breeds are still developing muscle mass and filling out their frame. This is also when diet control becomes critical — as metabolism slows, overfeeding can quickly lead to unhealthy weight gain.
12 to 24 Months — Final Growth Phase for Large and Giant Breeds Giant breeds like Great Danes, Mastiffs, and Saint Bernards can continue growing until 18–24 months. This stage is less about height and more about filling out bone structure and muscle. A dog weight calculator used regularly during this phase helps ensure your pup stays within a healthy range.
Puppy Growth Chart by Breed Size
Not all dogs grow at the same pace. This puppy weight chart gives average body weight ranges by age group and breed size, so you can check whether your puppy is on track.
| Age | Toy (under 10 lb) | Small (10–25 lb) | Medium (25–50 lb) | Large (50–90 lb) | Giant (90+ lb) |
|---|---|---|---|---|---|
| 8 Weeks | 1–2 lb | 3–6 lb | 7–11 lb | 11–20 lb | 15–26 lb |
| 3 Months | 3–6 lb | 6–11 lb | 11–20 lb | 20–33 lb | 26–44 lb |
| 4 Months | 4–9 lb | 9–15 lb | 18–29 lb | 26–44 lb | 40–62 lb |
| 6 Months | 6–12 lb | 11–20 lb | 22–40 lb | 40–66 lb | 62–88 lb |
| 1 Year | 7–12 lb | 13–24 lb | 24–51 lb | 51–99 lb | 99–154+ lb |
These figures align with standard AKC breed weight data and are consistent with the growth references used by professional vets worldwide.
Breed-Specific Puppy Weight & Growth Guides
Different breeds have very different growth trajectories. Here’s what to expect for some of the most popular breeds, based on their typical dog weight chart benchmarks:
Labrador Retriever Puppy Weight Chart Labs are large, athletic dogs. Males typically reach 65–80 lb and females 55–70 lb. A 3-month-old Lab puppy usually weighs around 20–25 lb. Labs are mostly full grown by 12–18 months, though they continue filling out muscularly into their second year. When do Labs stop growing? Most reach their full height by 12 months, but their weight matures closer to 18 months.
Golden Retriever Growth Chart Golden Retrievers grow to 55–75 lb on average, with males on the higher end. At 8 weeks, a Golden puppy weighs roughly 10–14 lb. Fast growth happens in the first 6 months, then slows. Most Goldens are fully grown by 12–15 months. A Golden Retriever Aussie mix or a Golden Doodle adult may grow slightly differently depending on the second breed.
German Shepherd Growth Chart German Shepherds reach 50–90 lb at full maturity, with males typically larger. An 8-week-old German Shepherd weighs around 12–16 lb. A 3-month-old German Shepherd is often around 22–30 lb. Full grown German Shepherd height is usually 22–26 inches at the shoulder, with adult weight reached around 18–24 months.
Chihuahua Growth Chart and Weight Chart Chihuahuas are toy breeds that mature early. Full grown Chihuahuas typically weigh 4–6 lb. Newborn Chihuahuas are tiny — sometimes under 3 oz. How much should a Chihuahua weigh? Anything above 6 lb may indicate overweight for the breed. They are typically full grown by 9–10 months.
Dachshund Size Chart Standard Dachshunds weigh 16–32 lb. Mini Dachshund weight at full grown is usually 8–11 lb. A full grown teacup miniature Dachshund is the smallest variety. Dachshunds reach adult size around 12 months but may fill out slightly until 18 months.
Yorkshire Terrier (Yorkie) Growth Chart and Weight Calculator How big do Yorkies get? Adult Yorkies typically weigh 4–7 lb. A big Yorkie or full grown big Yorkie might reach 8–10 lb. The Yorkie weight calculator based on 8-week weight can usually predict adult size with reasonable accuracy. A full grown Yorkie is generally reached by 9–12 months.
Golden Doodle / Goldendoodle Full Grown Adult Goldendoodle or full grown Golden Doodle weight depends on whether it’s a standard or mini. Standard Goldendoodles reach 45–75 lb, while mini Goldendoodles weigh 15–30 lb. A toy Goldendoodle full grown stays under 15 lb.
Rottweiler and German Shepherd Mix A Rottweiler German Shepherd is a large, muscular dog. Full grown, they typically reach 75–115 lb. A baby Rottweiler at 8 weeks weighs roughly 12–22 lb, and a big Rottweiler male can exceed 120 lb.
Cane Corso Full Grown Cane Corso average weight is 90–120 lb. A full grown Blue Cane Corso or a Cane Corso mixed with Rottweiler can exceed this range. Cane Corsos reach full size around 18–24 months.
Poodle Height and Weight by Variety Full size standard Poodles weigh 40–70 lb. Mini Poodle full grown weight is 10–15 lb. Toy Poodle full grown size is under 10 lb — a full grown toy Poodle typically weighs 4–6 lb. Toy Poodle adult size is reached by 10 months.
Shih Tzu Full Grown A full grown Shih Tzu weighs 9–16 lb. A Shih Tzu Yorkie mix full grown may weigh slightly less. Shih Tzus are fully mature by 10–12 months.
Pitbull Weight and Height Average Pitbull weight is 30–60 lb depending on gender and lineage. How tall is a Pitbull? Usually 17–21 inches at the shoulder. A Pitbull Husky mix puppy or Pitbull Rottweiler mix puppy will likely be larger. A micro Pitbull or micro mini Pitbull is a much smaller variety, typically under 20 lb.
Husky Weight Siberian Huskies weigh 35–60 lb at maturity. A Husky and Australian Shepherd mix or an Australian Husky will fall in a similar range. A teacup Husky or toy Husky is not a recognized breed by AKC and weight varies significantly.
Great Dane Growth Chart Great Dane weight can reach 110–175 lb. A Great Dane Cane Corso mix or Great Dane Poodle mix will vary depending on dominant genetics. Great Danes are one of the longest-growing breeds, often reaching full size at 18–24 months.
Bernese Mountain Dog Weight Full grown Bernese Mountain Dogs weigh 70–115 lb. A Bernese Mountain Dog German Shepherd mix typically falls between 60–95 lb. Bernese Mountain Dog size and full grown height is usually 23–27 inches at the shoulder.
What Factors Affect How Big My Puppy Will Get?
The how big will my puppy get question doesn’t have a single answer. Several factors influence your puppy’s final size:
Genetics and Parent Size The most reliable indicator of adult size is the size of the parents. If both parents are on the larger side of a breed standard, expect a bigger pup. For a mixed breed like a Chihuahua French Bulldog mix or a Beagle Chihuahua mix, the puppy’s size depends on which genetic traits are more dominant. Want to check your dog’s size against breed standards? Our dog size calculator can help.
Gender Male dogs are typically 10–15% heavier than females of the same breed. This difference is especially noticeable in large breeds like German Shepherds, Rottweilers, and Labrador Retrievers. In small breeds like Chihuahuas, the size difference is minimal.
Desexing (Spay or Neuter) Spaying or neutering before full maturity can slightly delay the closure of growth plates, making the dog marginally taller. However, it does not significantly impact total adult weight. Neutered dogs can become prone to weight gain due to metabolic changes, so diet monitoring is essential after the procedure.
Nutrition and Feeding Proper puppy nutrition is critical for healthy development. Underfeeding can stunt growth, while overfeeding — especially in large breeds — can put stress on developing joints and lead to obesity. Large breed puppies require specialized formulas with controlled calcium and phosphorus levels to support healthy bone development.
Health, Parasites, and Chronic Illness Parasites like worms or ticks, chronic illness, or genetic conditions can interrupt normal puppy development. Regular vet checkups ensure any issues are caught early before they affect growth trajectory.
Exercise and Activity Levels Too little exercise can slow coordination and contribute to unhealthy weight gain. Too much high-impact activity — especially jumping or running on hard surfaces — can strain developing joints in large breed puppies. A good rule is 5 minutes of exercise per month of age, up to twice daily.
Puppy Feeding Guide — How Much to Feed by Age and Size
Feeding the right amount is just as important as knowing your puppy’s adult size. A puppy weight predictor tells you where your pup is headed — your feeding schedule determines how healthily they get there.
General Feeding Frequency Puppies under 3 months should eat 4 times daily. From 3–6 months, 3 meals per day is ideal. After 6 months, most puppies do well on 2–3 meals daily. By 12 months, 2 meals per day is the standard adult feeding routine.
Puppy Feeding Chart by Weight
| Puppy Weight | Daily Food Amount | Meals Per Day |
|---|---|---|
| Under 5 lb | ¼ – ½ cup | 4 meals |
| 5–10 lb | ½ – 1 cup | 3–4 meals |
| 10–20 lb | 1 – 1½ cups | 3 meals |
| 20–40 lb | 2 – 3 cups | 3 meals |
| 40–60 lb | 3 – 4 cups | 2–3 meals |
| 60–90 lb | 4 – 5 cups | 2–3 meals |
| 90+ lb | 5 – 6+ cups | 2 meals |
Always adjust based on your puppy’s specific food brand’s calorie density. These are estimates based on typical dry kibble. The 10% treat rule applies here too — treats should not exceed 10% of daily caloric intake to avoid unnecessary weight gain.
For labrador feeding chart by age or breed-specific portion guidance, your vet is the best resource.
When Do Dogs Stop Growing? — Full Maturity by Breed Size
One of the most common questions new puppy owners ask is: when are dogs fully grown? The answer depends entirely on breed size.
Toy and Small Breeds (Chihuahua, Yorkie, Mini Dachshund, Toy Poodle, Pomeranian): Reach full adult size between 9–12 months. These dogs mature quickly and their growth plates close early.
Medium Breeds (Beagle, Cocker Spaniel, Border Collie, Australian Shepherd): Full grown between 12–15 months. Most of their height is set by 12 months, and they fill out slightly after.
Large Breeds (Labrador, Golden Retriever, German Shepherd, Husky, Doberman): Typically stop growing in height by 12–14 months, but continue filling out muscularly until 15–18 months.
Giant Breeds (Great Dane, Mastiff, Saint Bernard, Cane Corso, Great Pyrenees): These breeds may not reach full size until 18–24 months. When do Labs stop growing? Around 12–18 months. For Great Danes, it can be closer to 2 years.
A useful rule of thumb: small breeds triple their 8-week weight at maturity. Medium and large breeds roughly double their 16-week weight as adults.
How to Use a Puppy Age Chart and Dog Years Calculator Together
Understanding your puppy’s age in development terms is just as valuable as tracking their physical growth. A puppy aged 8 weeks is equivalent to a human infant in developmental terms. By 6 months, they’re roughly at a human adolescent stage. Our dog age calculator converts your dog’s age into human years, accounting for breed size, so you can better understand where your pup is in their life journey.
The dog years calculator and the puppy age chart together give you a complete picture — not just how big your dog will get, but how old they truly are in terms of mental and physical maturity.
Mixed Breed Puppy Weight Prediction
Predicting adult size in mixed breed dogs is harder than for purebreds, but still very possible. Here are tips for common popular mixes:
If you have a Labradoodle full grown or mini Labradoodle full grown, expect 50–65 lb for a standard and 15–25 lb for a mini. A Goldendoodle adult size follows similar patterns.
For a Pitbull Husky mix puppy, adult weight typically lands at 45–65 lb. A Husky Australian Shepherd mix (also called an Australian Husky) will usually be 40–65 lb full grown.
A Chihuahua and Beagle mix (Cheagle) typically reaches 9–20 lb, while a Chihuahua Shih Tzu mix is usually 7–14 lb as an adult.
For mixes where you don’t know both parent breeds, use the medium-large dog formula: double the puppy’s weight at 16 weeks to estimate adult weight. This is the most commonly recommended approach for mixed breed puppy weight prediction.
If your cat is also part of the family, check our cat age calculator to track their development milestones too.
Puppy Growth & Development FAQs
How accurate is a puppy weight calculator?
For purebred dogs, these tools are typically accurate within 10–20%. Mixed breeds have more variation. Accuracy improves as your puppy ages because less growth remains to estimate. Regular weigh-ins combined with vet visits give the most reliable picture.
How big will my puppy get?
Your pup’s adult size is primarily determined by breed genetics and gender. Use our calculator above for a personalized estimate. As a quick rule: small breeds triple their 8-week weight; medium to large breeds double their 16-week weight.
When do puppies stop growing?
Toy and small breeds are fully grown by 9–12 months. Medium breeds by 12–15 months. Large breeds by 15–18 months. Giant breeds may continue growing until 18–24 months.
Does the smallest puppy in the litter stay the smallest?
Not always. The runt can catch up with siblings given proper nutrition. However, some may remain smaller due to genetics, not just birth order.
Can a puppy’s paw size predict adult size?
Large paws can suggest a bigger adult size, but it’s only a rough indicator and not reliable on its own.
Do mixed breed puppies grow differently than purebreds?
Yes. Mixed breeds can inherit different growth rates from each parent. Using the medium-large formula (doubling 16-week weight) gives a reasonable estimate. DNA testing can also help.
Do dogs eat less when they stop growing?
Yes. Once growth slows, caloric needs decrease. Failing to reduce portions after the puppy stage is a leading cause of obesity in adult dogs.
How often should I weigh my puppy?
Weigh weekly during the first 6 months, then monthly until full maturity. Track the numbers against your breed’s dog weight chart to spot any early deviations.
How can I tell if my puppy is overweight or underweight?
Run your hands along their ribs. You should feel them easily without pressing hard, but they should not be visible. A visible waistline from above and a slight tuck of the belly from the side are signs of a healthy weight.
Related Free Tools You’ll Love
Looking for more ways to track and understand your pet’s health and development? These tools work alongside your puppy weight calculator for a complete pet care toolkit:
- Dog Size Calculator — Find out what size category your dog falls into and compare against breed standards
- Dog Age Calculator — Convert your dog’s real age to human years, adjusted for breed size
- Cat Age Calculator — Track your cat’s life stage in human year equivalents
Disclaimer: This puppy weight calculator provides estimates based on veterinary growth data and AKC breed standards. Actual adult weight can vary by ±10–20% due to genetics, nutrition, health, and individual development. This tool is for informational purposes only and does not replace professional veterinary advice. Always consult your veterinarian for personalized guidance on your puppy’s growth and health.