If you are watching your Labrador puppy grow seemingly by the week, you are not imagining it. The labrador puppy growth chart below breaks down what to expect for weight and height at each stage, so you can tell normal growth spurts from something worth a vet visit.
Labradors are a medium-to-large breed with real size variation depending on bloodline, with field-line Labs typically leaner and show-line Labs often bulkier. The numbers below are general averages rather than a strict target.
Quick answer: Labrador puppies grow fastest between 2 and 6 months old, often gaining around 2 pounds a week during that stretch. Most reach adult height by 9 to 12 months, though muscle and chest fill continue until 18 to 24 months.
Labrador Puppy Growth Chart by Age
| Age | Male Weight | Female Weight |
|---|---|---|
| Birth | Under 1 lb | Under 1 lb |
| 1 month | 5-8 lbs | 4-7 lbs |
| 2 months | 15-20 lbs | 13-18 lbs |
| 3 months | 25-30 lbs | 22-27 lbs |
| 4 months | 30-38 lbs | 27-33 lbs |
| 5 months | 38-48 lbs | 33-42 lbs |
| 6 months | 45-55 lbs | 40-50 lbs |
| 9 months | 55-65 lbs | 48-58 lbs |
| 12 months | 60-75 lbs | 50-65 lbs |
| 18 months | 65-80 lbs | 55-70 lbs |
| Adult (18-24 months) | 65-80 lbs | 55-70 lbs |
At full maturity, adult height generally falls between 22.5 and 24.5 inches at the shoulder for males, and 21.5 to 23.5 inches for females, according to the American Kennel Club breed standard.
Why Labrador Puppies Grow So Fast
Most Labrador puppies gain around 2 pounds a week from birth until roughly 6 months old. That rapid pace is why a 25-pound puppy at 3 months can be pushing 50 pounds by 6 months.
Growth slows noticeably after 6 months, though it does not stop completely. Height is usually close to final by 9 to 12 months, but chest depth and overall muscle mass keep filling out until closer to 18 to 24 months. A 12-month-old Lab often looks a little lean and gangly compared to how they will look as a fully mature 2-year-old.
When Do Labradors Stop Growing?
Most Labradors reach their adult height somewhere between 9 and 12 months old. Weight and body fill, however, can continue increasing until 18 to 24 months, especially in larger-boned or show-line dogs.
Genetics play a bigger role in a Labrador’s final size than almost any other factor. Field-line Labs tend to run leaner and slightly smaller, while show-line Labs are often bulkier and heavier at maturity.
Exercise Guidelines While Your Puppy Is Growing
Even though Labrador puppies reach their height relatively early compared to some large breeds, their joints are still developing well past that point. A simple rule many trainers and vets use is about 5 minutes of structured exercise per month of age, twice a day, until closer to a year old.
Avoid repeated jumping, forced running, or long hikes on hard pavement while your puppy is still filling out. Labradors are naturally enthusiastic and often do not self-limit well, so it is up to you to keep structured activity in check during this stage.
The VCA Animal Hospitals recommends limiting high-impact activity in large breed puppies until skeletal growth is more complete, since Labradors carry a higher lifetime risk of joint issues like hip and elbow dysplasia.
Feeding Your Labrador Puppy for Healthy Growth
Overfeeding a fast-growing Labrador puppy does not necessarily produce a bigger adult dog. It mainly adds extra stress to developing joints during the growth window, which is why free-feeding puppy kibble is generally discouraged for this breed.
A large-breed puppy formula with controlled calcium levels supports steady, even development. Most puppies do well on 3 meals a day until around 6 months, then a switch to 2 meals a day afterward.
Labradors are notorious for their appetite and food motivation, which makes portion control especially important. Checking body condition by feeling for ribs with light pressure is a more reliable guide than chasing an exact number on the scale.
How to Tell If Your Puppy Is Growing Normally
Growth rarely follows a perfectly straight line. A few practical ways to check whether your Labrador puppy’s development looks on track include the following.
- Compare current weight to the chart above for their age and sex, allowing for natural variation
- Check body condition by feeling for ribs with light pressure rather than relying on weight alone
- Ask your breeder about the size of the puppy’s parents, since most dogs land close to their parents’ adult size
- Remember that field-line and show-line Labradors naturally differ in build, so comparing across bloodlines is not always useful
When Should You Talk to Your Vet About Growth?
Being somewhat above or below the averages in the chart above is usually not a concern on its own. A gap of two months or more compared to typical growth patterns, or a puppy that seems consistently underweight, overweight, or in pain, is worth discussing with your veterinarian.
This article is meant as a general guide, not a diagnostic tool. Always talk to your vet about concerns specific to your individual puppy’s growth or development.
If you are also working through training basics with your growing Labrador, our Dog Exercise Routine Guide covers how much daily activity is appropriate as your puppy matures. If you are weighing breeds or comparing a Labrador to another working breed, our German Shepherd Puppy: Complete First-Year Guide covers a similar first-year journey for that breed.
Frequently Asked Questions
How big will my Labrador puppy get?
Most adult Labradors fall between 55 and 80 pounds depending on sex and bloodline, with males on the larger end. Height typically ranges from 21.5 to 24.5 inches at the shoulder.
At what age do Labradors grow the fastest?
The fastest growth happens between birth and 6 months old, when puppies often gain around 2 pounds a week.
When do Labrador puppies stop growing?
Most reach adult height by 9 to 12 months, though muscle and chest fill can continue until 18 to 24 months.
Are male Labradors bigger than females?
Yes. Males are typically taller and heavier than females at every stage, often by 10 to 15 pounds once fully grown.
Is my Labrador puppy underweight or overweight?
Comparing your puppy’s weight to the chart above is a helpful starting point, but body condition, meaning whether you can feel their ribs with light pressure, matters more than an exact number. Ask your vet if you are unsure.
Do show-line and field-line Labradors grow differently?
Yes. Field-line Labs tend to be leaner and slightly smaller, while show-line Labs are often bulkier and heavier at full maturity.
Final Takeaway
Your Labrador puppy’s fastest growth happens in the first 6 months, but full development continues well into their second year. Use this chart as a general guide, focus on body condition rather than chasing an exact number, and keep your vet in the loop if anything seems off.
As your puppy grows, breed-specific guidance on biting, exercise needs, and calming down will help you navigate the rest of their first year. Our Labrador Puppy Biting Phase: How Long Does It Last?, How Much Exercise Does a Labrador Puppy Need?, and When Do Labrador Puppies Calm Down? guides cover what comes next, along with our complete Labrador Puppy: Complete First-Year Guide.
Author Bio
David Jason is the founder of My Pet Care Tips and writes practical, research based guides to help pet owners raise healthier, happier dogs and cats. His content focuses on clear, beginner friendly advice backed by trusted veterinary resources and real world pet care best practices.