How Long Do Labrador Retrievers Grow?
Labrador Retrievers typically grow until they’re about 12 to 18 months old, with most reaching their full height by 9 to 12 months and continuing to fill out in muscle and weight up to 18–24 months. Their growth timeline depends on genetics, diet, and activity levels, but in general, the bulk of their height growth is done in the first year, while their body matures a bit longer.
Labrador Retriever Growth Stages Explained
Growth in Labs doesn’t happen overnight — it follows a steady, natural pattern that can help owners understand what to expect at each stage.
Birth to 8 Weeks – The Foundation
Puppies are born blind, deaf, and completely reliant on their mother. During this early stage, they double and triple in size rapidly. However, they aren’t ready to leave the litter just yet. Breeders usually keep them until they’re 8 weeks old — a critical time for learning basic dog behaviors.
2 to 4 Months – Rapid Growth Begins
This is when the real growth spurt kicks in. At 8 weeks, a Lab pup may weigh 10–15 pounds, and by 4 months, they can reach 25–40 pounds. Limbs start stretching out and the classic “puppy clumsiness” appears.
🐾 Tip: This stage is perfect for starting socialization and training — it supports healthy development.
4 to 9 Months – The Teenage Phase
From 4 to 9 months, Labradors experience another noticeable growth spurt. Most will reach 75–80% of their adult height during this time. Expect them to look a little lanky, with long legs and less body mass. It’s normal — their body is prioritizing skeletal growth before filling out.
9 to 12 Months – Height Plateaus
By the time they hit 9–12 months, most Labs will have reached their adult height, which averages:
21.5 to 23.5 inches for females
22.5 to 24.5 inches for males
Although they might look “fully grown,” their body composition will still change.
12 to 18+ Months – Filling Out
After the first year, growth shifts from height to muscle and weight. This filling-out process makes the dog look more balanced and mature. By 18–24 months, most dogs have completed their growth cycle.
🦴 Reminder: Overfeeding or pushing for fast growth can lead to joint issues later. Always follow veterinarian-recommended feeding plans.
Growth Chart: Labrador Retriever Weight by Age
| Age | Male Weight (lbs) | Female Weight (lbs) |
|---|---|---|
| 8 weeks | 10–15 | 8–12 |
| 3 months | 22–30 | 20–26 |
| 6 months | 40–55 | 35–45 |
| 9 months | 55–70 | 45–60 |
| 12 months | 65–80 | 55–70 |
| 18+ months | 65–90 (Adult) | 55–80 (Adult) |
📊 Always consult your vet if your Lab is significantly above or below these ranges.
Frequently Asked Question(s)
Do male Labradors grow bigger than females?
Yes, on average. Male Labs typically grow 2–4 inches taller and 10–20 pounds heavier than females.
Can a Labrador grow after 1 year?
Most height growth is complete by 12 months, but weight and muscle mass continue developing until about 18–24 months.
Is it bad if my Lab is growing too fast?
Rapid growth can strain bones and joints. It’s essential to monitor weight gain and ensure your pup isn’t being overfed.
Should I neuter before my Labrador finishes growing?
Recent studies suggest waiting until at least 12–18 months to neuter large breeds like Labs to avoid joint issues. Always consult your vet for the best timing.
How do I know if my Lab is underweight or overweight?
Feel their ribs — you should be able to feel them without pressing hard. Labs are prone to obesity, so portion control and exercise are key.