Beagle Growth Chart & Puppy Weight Calculator

Did you get a Beagle puppy and wonder what his adult size will be? Our puppy growth chart and weight calculator is the most accurate one on the internet – simply enter your dog’s weight and age below and see our prediction:

Beagle Weight Calculator & Growth Chart

Table of Contents

beagle growth

How big will my Beagle get?

The American Kennel Club has two distinct varieties of Beagles.

  • Beagles under 13 inches – these dogs weigh under 20 pounds
  • Beagles 13-15 inches – these dogs weigh 20-30 pounds

How big exactly your Beagle will be depends on the size of his parents.

Size is largely determined by genetics. If your Beagle comes from a line of tall Beagles that are around 15 inches tall and weigh about 30 pounds, expect him to also grow up to reach this size.

If your Beagle’s parents and grandparents were on the smaller side, he himself will also likely turn out to be a small dog under 20 pounds.

It is important to note that size is not always predictable in how it gets inherited. A cross of a tall and a small dog does not produce offspring that are exactly the average of both parents’ sizes. Instead, some offspring might be as tall as the large parent, some will be very small and some will be in between the parents’ size. There is no way to accurately predict the size of a litter of puppies based on the parents.

full grown beagle

Do Beagles grow fast?

As small to medium dogs, Beagles grow quickly and are finished growing before or around their first birthday. The larger a dog breed is, the longer it takes the puppies to reach their full adult size. If you own a Beagle, expect him to not grow much at all after his first birthday.

All dogs grow the fastest in their first 3 months of life:

  • At birth, a Beagle weighs 5-10 ounces
  • At 2 months, a Beagle pup weighs about 5 pounds
  • At 3 months, a Beagle pup already weighs about 10 pounds



How big is a 6 month old Beagle?

At 6 months old, a Beagle will weigh 13-20 pounds. How big exactly your Beagle is will depend on his size – if he is the offspring of small parents, he will be on the lower end of this weight spectrum. If his parents were tall, he is likely to be closer to 20 pounds.

After the 6 month mark, the growth of your Beagle will noticeably slow down and eventually taper off around his first birthday.

What is a healthy weight for a Beagle?

How much exactly your Beagle should weigh will depend on his size. A small Beagle who stands at 12 inches might weigh as little as 15 pounds. On the other hand, a large Beagle who is 15 inches tall has a healthy weight at 30 pounds.

Beagles are extremely food-motivated and are known for their love of treats. Most Beagle owners struggle with keeping their Beagle at a healthy weight. It is extremely important that you do not overfeed your Beagle, especially while he is growing. 

Being overweight comes with a variety of problems, such as:

  • Joint and back pain
  • Lethargy
  • Diabetes
  • Kidney issues

Your Beagle will probably beg for food for his entire life. Get used to saying no to treats and keep him in a lean condition. He will live much longer and healthier!


What is overweight for a Beagle?

The exact weight at which your Beagle is too heavy will depend on how tall he is. Rather than going by a specific number, assess his weight by running your fingers along his rib cage.

  • If you can feel the ribs sticking out, and vertebrae and hip bones are visible, your Beagle is too thin!
  • If you can feel the ribs but they are not sticking out, he is at a great weight.
  • If you have to push in to feel your dog’s ribs, or you cannot feel them at all, he is overweight.

In addition, you should be able to see what is called a “tummy tuck”. Your dog’s tummy should curve in behind his rib cage. If your Beagle has a belly, he needs to lose some weight,

Due to the intense love of food this breed has as well as their tendency to be pretty sedentary once they reach adulthood, it is crucial that you pay a lot of attention to your Beagle’s weight. 

If you struggle to keep him lean even when cutting back on treats, consult with your vet. There are special diet foods dogs can eat that will help your Beagle get back into shape.

beagle sitting

Why is my Beagle so small?

If you have an especially small Beagle, you may be concerned about his size. There are several possible explanations for low weight and height in Beagles:

Intestinal parasites

Intestinal parasites are common, but luckily easy to treat. Giardia, hookworms, roundworms etc. can be responsible for stunted growth and low weight. These are especially common in puppies. The good news is that intestinal parasites are easy to treat and puppies quickly catch up on their growth curve once cleared!

Small breeding

If your Beagle is the offspring of two small parents (or even one small parent, or small grandparents …), chances are he himself will be a small dog. If he is not underweight and does not show any sign of illness, don’t worry: He is most likely completely fine and simply a tiny specimen of the breed.

Mixed breeding

Unfortunately, a lot of irresponsible breeders produce puppies that are not pure-bred. They might cross Beagles with other small breeds, such as Pugs or Boston Terriers. The offspring are then sold as “pure-breds”, but fail to ever reach the size of a full-blooded Beagle. 

If your breeder sold you your puppy without papers, mixed breeding is an unfortunate possibility. The only way to know for sure is to do genetic testing on your dog. Whatever the outcome might be though: He will still be an amazing companion and pet!