Puppy weight calculator
How big will your puppy get? Enter age and weight – we estimate the adult weight with the growth curves from the FEDIAF guidelines.
In months, from 2 to 12. 8 weeks is 2 months, 12 weeks almost 3.
Your puppy will weigh about
28 lb
At 3 months that’s about 46% of the adult weight.
According to the curve, your puppy is gaining about 13 oz a week right now.
| Age | Weight |
|---|---|
| 2 months | 9 lb |
| 3 months | 13 lb |
| 4 months | 16 lb |
| 5 months | 18 lb |
| 6 months | 20 lb |
| 7 months | 22 lb |
| 8 months | 23 lb |
| 9 months | 24 lb |
| 10 months | 25 lb |
| 11 months | 26 lb |
| 1 year | 27 lb |
An estimate from the growth curves in the FEDIAF guidelines (2025). The typical weight of the breed or the parents’ weight is more accurate. Typical weight by breed
The short answer
According to the growth curves in the FEDIAF guidelines (2025), a puppy weighs about 32–51% of its adult weight at 3 months and 57–77% at 6 months, depending on size. Divide the weight by that share to get the adult weight: a 13 lb puppy at 3 months will weigh about 28 lb. It’s an estimate.
Questions
How big will my puppy get?
Divide its weight by the share of adult weight puppies typically reach at that age. A 13 lb puppy at 3 months has reached about 46% according to the FEDIAF growth curves, so it will weigh about 28 lb. The calculator does the math for you.
How accurate is the estimate?
It’s an estimate. Dogs grow differently, and the estimate can jump at the borders between size classes. The typical weight of the breed or the parents’ weight is more accurate.
When is a dog fully grown?
According to the Merck Veterinary Manual, small and medium dogs at 8–12 months, large and giant breeds often only at 10–16 months. The growth curves cover 8 weeks to 1 year.
Why do I need the adult weight?
For the food amount: the further a puppy is from its adult weight, the more energy it needs. Use the button below the result to take the adult weight into the puppy food calculator.
Related
- Puppy food calculatorDaily amount for your puppy – from age, weight and adult weight.
- How big will my puppy get?Puppies don’t grow at a steady pace in their first year: fast at first, then slower and slower. The growth curve shows how much of its adult weight a puppy has already reached.
- How much to feed, by breedTypical weight, a daily feeding chart and a calculator for your own food. The breed only sets the range; what counts is your pet’s weight.