Puppy growth chart
Short answer
By 6 months, puppies have typically reached about 75 percent of adult weight if small, 66 percent if medium, 60 percent if large and 50 percent if extra-large, according to the American Kennel Club. Enter your puppy’s expected adult weight below to see its own expected weights by age. All figures are approximate.
Key takeaways
- The AKC chart gives the share of adult weight at 6, 9, 12, 15 and 18 months for four size groups.
- Small puppies are about 75 percent grown at 6 months; extra-large puppies are about 50 percent grown.
- Every size group is at 100 percent by 18 months on the chart, and the numbers are approximate.
- To estimate adult weight from your puppy’s weight today, use our adult weight estimator.
What is a normal puppy growth chart by age?
The American Kennel Club publishes a chart of the share of adult weight a puppy has usually reached at each age, by size group. All of its numbers are approximate.
| Age | Small0 to 20 lb as an adult | Medium21 to 50 lb as an adult | Large51 to 100 lb as an adult | Extra-largeover 100 lb as an adult |
|---|---|---|---|---|
| 6 months | 75% | 66% | 60% | 50% |
| 9 months | 90% | 85% | 75% | 65% |
| 12 months | 100% | 95% | 85% | 80% |
| 15 months | 100% | 100% | 95% | 90% |
| 18 months | 100% | 100% | 100% | 100% |
How are the size groups defined?
The AKC groups puppies by expected adult weight: small (0 to 20 lb), medium (21 to 50 lb), large (51 to 100 lb), extra-large (over 100 lb).
How do I use the chart?
Find your puppy’s size group and age, then divide its weight by the percentage. Worked example, calculated by us: a medium-size puppy that weighs 20 pounds at 6 months is at about 66 percent of adult weight, so 20 ÷ 0.66 is roughly 30 pounds. The adult weight estimator does this for you, and the calculator above works the other way, from expected adult weight to expected weight by age.
What if my puppy is above or below the chart?
Individual dogs vary, and the AKC says its numbers are approximate. If you are worried about your puppy’s weight or growth, ask your veterinarian. See also when puppies stop growing.
Frequently asked questions
How much of its adult weight should my puppy have at 6 months?
About 75 percent for small puppies, 66 percent for medium, 60 percent for large and 50 percent for extra-large, according to the AKC chart. These are approximate.
At what age is a puppy half grown?
On the AKC chart, extra-large puppies are about 50 percent of adult weight at 6 months. Small puppies are about 75 percent grown at that age.
Does the chart work for mixed breeds?
It is organized by expected adult weight, not breed. If you do not know the adult weight, use the estimator, which shows results for all four size groups.
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