Puppy weight calculator
Enter your puppy’s breed or size group, sex, age in weeks and weight. The calculator places the weight on the growth chart of the size group and shows the range the puppy would weigh at 12 and 24 months if it keeps to the same band. It is a guide, not a prediction.
Check your puppy’s weight
Result
Male, 17 weeks, 12.8 lb
Middle half, above the median
Between the median and the 75th centile.
- Typical range at this age
- 7.6–16.3 lb (3.45–7.42 kg)Median 11.7 lb (5.33 kg)
- If your puppy stays in this band
- At 12 months: 23.0–26.5 lb (10.4–12.0 kg)
- At 2 years: 25.9–29.2 lb (11.7–13.3 kg)
See the full weight chart of this group
A weight outside the typical range is not a diagnosis. Weigh again on the same scale in a few days, and if it stays there or you are unsure, show the weights to your vet. Body condition matters as much as the number: WSAVA body condition chart for dogs (opens in a new tab).
Everything is calculated in your browser; nothing is sent anywhere.
Where the numbers come from
The calculator uses the same growth lines as our puppy weight charts: our fit of the open Waltham data (Salt and colleagues, PLOS ONE, 2017), healthy purebred dogs weighed at US clinics from 12 weeks to 2 years. Each size group has lines for males and females.
A breed in the list takes you to the size group the study placed it in. For a mixed-breed puppy, choose the group by the weight you expect your dog to reach as an adult.
What the result means
The result names the band of the chart your puppy’s weight falls in: below the typical range, inside it (split at the 25th centile, the median and the 75th), or above it. The typical range holds 82 of 100 healthy puppies of that age.
If your puppy keeps to the same band, the calculator shows where that band sits at 12 and 24 months. Many puppies do stay near their line, but not all: treat it as a range to watch, not a promise of adult size.
What it cannot tell you
Weight alone says nothing about whether a puppy is lean or carrying too much fat. If the weight is outside the typical range, or it crosses lines between weigh-ins, weigh again and talk to your vet, who can check body condition.
Frequently asked questions
How big will my puppy get?
Nobody can say exactly, but the band your puppy is in now is a fair guide. The calculator shows the range of that band at 12 and 24 months for your puppy’s size group and sex.
Can I enter the age in months?
The chart works in weeks. Multiply the months by 4.35 and round: 3 months is about 13 weeks, 4 months about 17, 6 months about 26.
Why does it start at 12 weeks?
The Waltham charts start at 12 weeks because there were too few weighings of younger puppies in the data.
Does it work for giant breeds?
No. Dogs over 88 lb (40 kg) as adults were not modelled in the study. WALTHAM publishes separate giant-breed charts; your vet can plot your puppy on one.
Sources
- Salt C, Morris PJ, German AJ, Wilson D, Lund EM, Cole TJ, Butterwick RF. PLOS ONE. Growth standard charts for monitoring bodyweight in dogs of different sizes. 2017. doi.org (opens in a new tab) (accessed )
- University of Liverpool Research Data Catalogue. Growth standard charts for monitoring bodyweight in dogs of different sizes: supporting data. 2017. doi.org (opens in a new tab) (accessed )
- WALTHAM Petcare Science Institute. WALTHAM Puppy Growth Charts. waltham.com (opens in a new tab) (accessed )
- American Kennel Club. Dog breeds: breed standards and weights. akc.org (opens in a new tab) (accessed )
- Veterinary Focus (Royal Canin Academy). Puppy growth charts, by Caitlin Grant, DVM, DVSc. academy.royalcanin.com (opens in a new tab) (accessed )
- WSAVA Global Nutrition Committee. Body Condition Score: dog. wsava.org (opens in a new tab) (accessed )