Dog Size Calculator

Dog Size Calculator – Find Out How Big Your Puppy Will Get

Not sure how big your furry friend will grow? Our Dog Size Calculator takes the guesswork out of puppy parenthood. Whether you have a tiny Chihuahua or a growing Great Dane, this free tool helps you predict your dog’s adult size, weight, and growth milestones — all in seconds.

What Is a Dog Size Calculator?

A dog size calculator is an online tool designed to estimate how big your puppy will grow based on key inputs like breed, current age, and current weight. It uses proven growth formulas and real-world dog weight charts and dog growth charts to give you the most accurate adult size prediction possible.

Whether you’re shopping for a crate, planning a diet, or just satisfying your curiosity, knowing your dog’s expected adult size matters — and our calculator makes it effortless.

How Big Will My Puppy Get?

This is one of the most common questions new dog owners ask — and the answer depends on several factors:

• Breed – A Golden Retriever grows very differently from a Toy Poodle
• Current age – Puppies grow at different rates depending on their age stage
• Current weight – Your puppy’s present weight is a strong predictor of adult weight
• Gender – Male dogs typically grow larger than females of the same breed

Our puppy size calculator uses these variables together to generate a reliable estimate. For most breeds, you’ll get a predicted adult weight range and approximate full-grown size category (toy, small, medium, large, or giant).

How to Use the Dog Size Calculator

Using our puppy weight calculator is simple:

1. Enter your puppy’s breed (or select size category if mixed breed)
2. Enter your puppy’s current age in weeks or months
3. Enter your puppy’s current weight
4. Click Calculate — get your results instantly

You’ll receive an estimated adult weight, growth curve, and size category. For mixed breeds, you can also check our Puppy Weight Calculator for breed-blend estimates.

Dog Size Categories – What Size Is Your Dog?

Understanding dog size categories helps you plan everything from food portions to collar sizes. Here’s a quick dog size chart based on adult weight:

Puppy Growth Chart – How Puppies Grow by Size

Every dog follows a puppy growth chart that reflects how their body develops over time. Smaller breeds reach full size faster, while giant breeds take much longer to mature.

Toy & Small Breeds (e.g., Toy Poodle, full grown Yorkie, Teacup Maltipoo) Reach adult size around 9–12 months. A full grown Toy Poodle typically weighs 4–6 lbs, while a full grown Teacup Yorkie may stay under 4 lbs.

Medium Breeds (e.g., Beagle, Cavapoo full grown, Mini Labradoodle full grown) Reach adult size around 12–15 months. A full grown Cavapoo usually weighs 12–25 lbs depending on the Poodle parent’s size.

Large Breeds (e.g., Golden Retriever, German Shepherd, Pitbull) Reach adult size around 15–18 months. The average Golden Retriever weight is 55–75 lbs; a male can weigh up to 80 lbs.

Giant Breeds (e.g., Great Dane, Bernese Mountain Dog, Newfoundland Dog, English Mastiff) Can take 18–24 months or longer. Great Dane weight at full maturity can exceed 140 lbs.

You can also track your dog’s aging milestones with our Dog Age Calculator.

Dog Weight Chart by Popular Breeds

Here’s a quick reference dog weight chart covering some of the most searched breeds:

Chihuahua

• How much should a Chihuahua weigh? Adult Chihuahuas typically weigh 3–6 lbs
• Full grown Teacup Chihuahua: under 3 lbs
• Chihuahua growth chart shows most reach full size by 10–12 months

Yorkie (Yorkshire Terrier)

• Standard Yorkie weight: 4–7 lbs
• Full size big Yorkie (oversize): up to 10–15 lbs
• Yorkie growth chart shows maturity at around 12 months
• Full grown Teacup Yorkie: under 4 lbs

Golden Retriever

• How much does a Golden Retriever weigh? Males: 65–75 lbs, Females: 55–65 lbs
• Golden Retriever height: 21–24 inches at the shoulder
• Golden Retriever growth chart shows full size at 18 months

Pitbull

• Average Pitbull weight: 30–60 lbs
• Pitbull height: 17–21 inches
• How tall is a Pitbull? Most stand 17–19 inches at the shoulder

Bernese Mountain Dog

• Bernese Mountain Dog weight: 70–115 lbs
• Bernese Mountain Dog size: Large to Giant
• Full grown Bernese Mountain Dog can take up to 2 years to fully mature

Great Dane

• Great Dane weight: 110–175 lbs
• Among the tallest breeds in the world
• Great Dane growth chart shows maturity between 18–24 months

Toy Poodle

• How big does a Toy Poodle get? Under 10 lbs, usually 4–6 lbs
• Toy Poodle full grown size: 9–10 inches tall
• Toy Poodle adult weight is reached by around 12 months

Rottweiler

• Average weight: 85–130 lbs
• Known for being a powerful, large-breed dog

Doberman

• Doberman weight: 60–100 lbs
• Lean, athletic build

Cane Corso

• Cane Corso average weight: 90–120 lbs
• A true giant working breed

Beagle

• Beagle weight: 20–30 lbs
• Beagle size: Small to Medium
• Full grown Beagle reaches adult size around 18 months
• Beagle full grown height: 13–15 inches

Dachshund

• Dachshund size chart: Standard (16–32 lbs) vs Miniature (under 11 lbs)

Popular Mixed & Designer Breed Sizes

Mixed breeds and designer dogs are incredibly popular — but their adult size can be tricky to predict. Here’s what to expect from some of the most loved hybrids:

Cavapoo Full Grown The Cavapoo (Cavalier King Charles Spaniel + Poodle) is one of the most popular doodle breeds. A full grown Cavapoo typically weighs 12–25 lbs, depending on whether the Poodle parent is Miniature or Toy. Mini Cavapoo full grown size usually falls around 12–16 lbs, while a Teacup Cavapoo may stay under 10 lbs.

Maltipoo Full Size A full grown Maltipoo (Maltese + Poodle) usually weighs 5–15 lbs. Adult Maltipoo size depends on the Poodle parent — Toy Poodle parents produce smaller dogs. Full grown Teacup Maltipoo can weigh as little as 2–4 lbs.

Aussiedoodle Full Grown The Aussiedoodle (Australian Shepherd + Poodle) comes in several sizes. Full grown Aussiedoodle weight ranges from 25–70 lbs depending on the Poodle size. Mini Aussiedoodle size usually falls between 15–35 lbs. Golden Aussiedoodle (Golden Retriever + Poodle) typically weighs 50–80 lbs.

Adult Mini Goldendoodle A Mini Goldendoodle full grown weighs approximately 15–35 lbs, standing about 13–20 inches tall.

Bernedoodle Size Bernedoodle size comparison: Standard (70–90 lbs), Mini (25–49 lbs), Tiny (10–24 lbs). Bernedoodle weight varies significantly by generation.

Full Grown Shorkie A full grown Shorkie (Shih Tzu + Yorkie) typically weighs 7–16 lbs.

Yorkie Pitbull Mix This unusual mix typically produces a medium-sized dog weighing 20–40 lbs.

Pitbull Rottweiler Mix Puppy When fully grown, this powerful hybrid can weigh 60–110 lbs.

Great Dane Husky Mix A Great Dane Husky mix can weigh 60–110 lbs with a lean, athletic build.

Great Dane German Shepherd Mix Expect 65–120 lbs in this large working dog hybrid.

Great Dane Golden Retriever Mix Usually weighs 60–110 lbs with a gentle temperament.

Great Dane Mix dogs in general tend to be large to giant, often exceeding 80 lbs.

Mastador (Mastiff + Labrador) The Mastador typically weighs 85–160 lbs — a true gentle giant.

Mastiff Lab Mix Similar to Mastador, expect 80–130 lbs at full maturity.

Bullmastiff Pitbull Mix Usually ranges from 70–110 lbs full grown.

Bernese Mountain Dog Lab Mix This popular mix typically weighs 55–100 lbs.

Rottweiler Lab Mix Puppy When fully grown, expect 70–110 lbs.

Staffordshire Terrier Puppies Full grown American Staffordshire Terriers weigh 40–70 lbs.

Mini Poodle Adult / Miniature Poodle Full Grown Mini Poodle weight at full maturity: 10–15 lbs, standing 10–15 inches tall.

Adult Cockapoo / Full Grown Cockapoo How big does a Cockapoo get? Usually 12–24 lbs depending on the Poodle parent size.

Full Grown Shih Poo A Shih Poo full grown weighs approximately 8–18 lbs.

Full Grown Beagle Full grown Beagles weigh 20–30 lbs and stand about 13–15 inches tall.

Mini Labradoodle Full Grown Weighs approximately 15–30 lbs at adult size.

Adult Maltipoo An adult Maltipoo usually reaches 5–15 lbs.

Toy Poodle Adult A Toy Poodle adult typically weighs 4–6 lbs and stands under 10 inches.

Full Grown Yorkie A standard full grown Yorkie weighs 4–7 lbs. Larger “full size big Yorkie” variants may reach up to 15 lbs.

Morkie Lifespan The Morkie (Maltese + Yorkie) is a small breed weighing 4–8 lbs full grown, with a lifespan of 10–15 years.

Yorkie Life Expectancy Yorkies typically live 11–15 years, with toy-sized dogs often living longer than large breeds.

American Bulldog Weight American Bulldogs weigh 60–120 lbs full grown — significantly larger than English Bulldogs.

XL Bully Size XL American Bully weight: 70–130 lbs+, with a muscular, compact frame.

American Bully Lifespan American Bullies typically live 10–12 years.

Malamute Size Alaskan Malamutes weigh 75–100 lbs and are built for power and endurance.

When Are Puppies Fully Grown?

One of the most common questions dog owners search for is when are puppies fully grown. The answer depends entirely on breed size:

• Toy breeds: 9–10 months
• Small breeds: 10–12 months
• Medium breeds: 12–15 months
• Large breeds: 15–18 months
• Giant breeds: 18–24 months

Knowing when your puppy will stop growing helps you plan their nutrition, exercise, and healthcare properly. Use our (link this) puppy weight calculator to track growth week by week.

What Is Considered a Medium-Sized Dog?

A medium-sized dog is generally defined as one that weighs between 25–60 lbs at full maturity. Common medium-sized breeds include the Beagle, Cocker Spaniel, Bulldog, and Border Collie. Medium dogs are often considered the “sweet spot” — manageable in apartments but sturdy enough for outdoor adventures.

How Big Is a Dog’s Brain?

Here’s a fun fact: How big is a dog’s brain? A dog’s brain is roughly the size of a tangerine, weighing about 2.5 ounces (72 grams). Despite its small size, the canine brain is highly developed in areas related to smell and social bonding — which is why dogs are such incredible companions.

How Much Does a Puppy Cost?

How much is a puppy? Puppy prices vary enormously by breed, breeder, and location. Pet store puppies and designer breeds like Cavapoos or Bernedoodles can cost $1,500–$5,000+, while adoption from a rescue is often $50–$500. Factor in ongoing costs like food (based on adult dog size), vet care, grooming, and supplies — all of which scale with your dog’s size.

AKC Puppy Weight Calculator – How It Works

The AKC puppy weight calculator method (used by the American Kennel Club) is one of the most referenced formulas for predicting adult dog size. For most breeds, the basic formula is:

• Small breeds: (Puppy weight at 6 weeks) × 4
• Medium breeds: (Puppy weight at 14 weeks) × 2.5
• Large breeds: (Puppy weight at 20 weeks) × 2
• Giant breeds: Use growth charts specific to the breed

Our Dog Size Calculator applies these formulas automatically based on your dog’s breed and current age, giving you a fast, accurate estimate without the manual math.

Dog Weight Scale – Is My Dog a Healthy Weight?

Beyond size prediction, it’s important to monitor your dog’s weight throughout their life. A dog weight scale check should happen at every vet visit. Signs your dog may be overweight include difficulty feeling their ribs, a sagging belly, and low energy. Signs they’re underweight include visible ribs, spine, and hip bones.

Use our dog size calculator not just to predict growth — but as a reference to understand whether your dog is on track at each puppy age milestone. You can also check our dog age calculator to understand your dog’s life stage in human years.

Yorkie Weight Calculator – Special Notes

Yorkies are one of the most searched breeds for size prediction, and for good reason — there’s a lot of size variation within the breed. A standard Yorkie weight calculator uses the puppy’s weight at 8 weeks to predict adult weight:

• 8-week weight × 3 = approximate adult Yorkie weight

The Yorkie weight chart shows that most Yorkies reach adult size between 12–15 months. A Yorkie growth chart can help identify whether your pup is on track or growing unusually large (common in “throwback” or full size big Yorkie types).

German Shepherd Growth Chart

German Shepherds are large, athletic dogs with a structured growth timeline. The German Shepherd growth chart shows:

• 3 months: 17–26 lbs
• 6 months: 44–57 lbs
• 12 months: 66–88 lbs
• 18+ months: Fully grown at 65–90 lbs (males), 50–70 lbs (females)

The average German Shepherd weight for an adult male is around 75–85 lbs. A German Shepherd Great Dane mix or Great Dane German Shepherd mix will obviously be significantly larger.

Golden Retriever Growth Chart

The Golden Retriever growth chart is a popular reference for owners of this beloved breed:

• 3 months: 22–32 lbs
• 6 months: 44–57 lbs
• 12 months: 65–75 lbs (males)
• 18 months: Fully grown

How much does a Golden Retriever weigh at full maturity? Males average 65–75 lbs, females 55–65 lbs. Golden Retriever height is typically 21–24 inches at the shoulder.

Pitbull Growth Chart & Size Guide

Pitbulls are a medium-to-large breed with impressive muscle mass. Key stats:

• Average Pitbull weight: 30–60 lbs
• Pitbull height: 17–21 inches
• How tall is Pitbull (the dog, not the rapper): 17–19 inches at shoulder
• Pitbull life expectancy: 8–15 years
• Pitbull rottweiler mix puppy full grown: 60–110 lbs

Great Dane Growth Chart

Great Danes are the gentle giants of the dog world. Their Great Dane growth chart is one of the steepest of any breed:

• 3 months: 35–45 lbs
• 6 months: 65–85 lbs
• 12 months: 100–130 lbs
• 18–24 months: Fully grown at 110–175 lbs

A Great Dane mix (with Husky, Golden Retriever, or German Shepherd) typically falls somewhere between the two parent sizes.

Frequently Asked Questions

Why Use Our Dog Size Calculator?

• ✅ Free and instant results
• ✅ Covers 200+ dog breeds
• ✅ Works for mixed and designer breeds
• ✅ Based on AKC formulas and real growth data
• ✅ Includes size category, weight range, and growth timeline
• ✅ Mobile-friendly — use it anywhere

Whether you’re curious about a cavapoo adult size, wondering about a full grown teacup Chihuahua, or trying to figure out the poodle height of your new puppy — our calculator has you covered.

🔗 Explore More Free Pet Tools:

• Puppy Weight Calculator — Week-by-week puppy weight tracking
• Dog Age Calculator — Convert dog years to human years
  Cat Age Calculator — For your feline family members