Beagle guide
Beagle Growth Chart: Weight by Age and When a Beagle Is Full Grown
Most beagles reach their adult height by about 12 months and fill out to their adult weight by around 18 months. The chart below shows typical weights by age for both beagle sizes. Every puppy grows at their own pace, so treat these as rough ranges, not targets.
Beagle growth chart
| Age | 13-inch beagle | 15-inch beagle |
|---|---|---|
| 8 weeks | 2 to 4 lb | 3 to 5 lb |
| 12 weeks (3 months) | 4 to 7 lb | 6 to 9 lb |
| 4 months | 6 to 9 lb | 8 to 12 lb |
| 6 months | 9 to 14 lb | 12 to 18 lb |
| 9 months | 12 to 17 lb | 16 to 23 lb |
| 12 months | 14 to 19 lb | 18 to 27 lb |
| 18 months (adult) | Under about 20 lb | About 20 to 30 lb |
These are approximate ranges. Parents' size, sex (males are often a little heavier), diet and activity all play a part.
When do beagles stop growing?
- Height: most of a beagle's growth in height happens in the first 6 to 9 months, and it's usually complete by about 12 months.
- Weight and muscle: beagles keep filling out — broader chest, more muscle — until roughly 18 months.
- Maturity: mentally, many beagles stay puppyish until 18 months to 2 years.
Beagle growth stages
8 to 12 weeks: your puppy comes home, eats four small meals a day and sleeps most of the day. See our puppy care guide.
3 to 6 months: the fastest growth. Adult teeth come in (expect chewing), and three meals a day is typical.
6 to 12 months: growth slows. Most beagles move to two meals a day, and to adult food around 12 months. Their adult coat comes in.
12 to 18 months: your beagle reaches adult height and fills out.
Is my beagle puppy growing normally?
Weight alone doesn't tell you much. Check their shape:
- you can feel the ribs easily, without a thick layer of fat
- there's a visible waist from above
- they're energetic and eating well
If your puppy is losing weight, not gaining for several weeks, or seems lethargic, see your vet. Beagles are far more likely to be overweight than underweight — see fat beagle and best dog food for beagles.
How big will my beagle get?
The parents are the best predictor. A puppy from two 13-inch parents will usually stay in the 13-inch range. Read 13-inch vs. 15-inch beagles.
Questions
How much should an 8-week-old beagle weigh?
Usually about 2 to 5 pounds, depending on size variety and the parents.
When is a beagle full grown?
Most beagles reach their adult height by about 12 months and their adult weight by around 18 months.
How much does a 6-month-old beagle weigh?
Typically about 9 to 14 pounds for a 13-inch beagle and 12 to 18 pounds for a 15-inch beagle.
Do beagle puppy paws show how big they'll get?
Big paws can hint at a larger adult, but the parents' sizes are a far more reliable guide.
Every Beagle Brook puppy page shows the puppy's expected size and both parents. See beagle puppies for sale.
