Puppy Growth Chart Calculator
Plot your puppy's weight against the expected curve for its size group and check whether it is growing at the right rate.
From the adult weight predictor, or the breed standard.
Growth check
on track -1.4% vs curve
Tracking normally for this size group. Keep weighing monthly.
- Expected at 6 months
- 18.3 kg
- Actual
- 18.0 kg
| Age | % of adult weight | Expected weight |
|---|---|---|
| 1 month | 12% | 3.0 kg |
| 2 months | 24% | 6.0 kg |
| 3 months | 40% | 10.0 kg |
| 4 months | 53% | 13.3 kg |
| 5 months | 64% | 16.0 kg |
| 6 months (now) | 73% | 18.3 kg |
| 7 months | 80% | 20.0 kg |
| 8 months | 86% | 21.5 kg |
| 9 months | 90% | 22.5 kg |
| 10 months | 94% | 23.5 kg |
| 11 months | 97% | 24.3 kg |
| 12 months | 100% | 25.0 kg |
How this is calculated
Each size group has a characteristic growth curve, expressed as the percentage of adult weight reached at each month. Multiplying that by a predicted adult weight gives the expected weight at every age, which the puppy's actual weight can then be compared against.
expected weight = adult weight × (percentage grown ÷ 100)
difference % = ((actual − expected) ÷ expected) × 100 Worked example
A medium-breed puppy expected to reach 25 kg is 73% grown at six months, so the curve predicts 18.3 kg. A puppy weighing 18 kg is within 2% of the curve and clearly on track. One weighing 25 kg at the same age is 37% above it, which in a large breed would be a reason to review the feeding rate with a vet.
How much variation is normal
Roughly 15% either side of the curve, for a single weigh-in. Puppies grow in bursts, so a measurement taken just after a spurt reads high and one taken just before reads low. The trend over three or four months tells you far more than any individual reading.
Sources
- WSAVA Global Nutrition Committee. Global Nutrition Guidelines and toolkit.
- American Animal Hospital Association. 2019 AAHA Canine Life Stage Guidelines.
- The percentage-of-adult-weight curves are the growth pattern described for each size group in veterinary pediatric nutrition references. They describe a typical shape, not a breed standard, which is why the tool reports a tolerance band rather than a target.
Keeping a record
Write the weight and date down each time, on paper or in your phone. The single most useful thing you can bring to a puppy check-up is a list of dated weights, because it turns a subjective impression into a curve your vet can read at a glance.
Body condition matters alongside weight. A puppy can sit exactly on the curve and still be carrying too much fat, or be lean and simply large-framed. Score condition monthly with the body condition calculator and use both together.
Common questions
Is my puppy the right weight for its age?
Compare it against the expected curve for its adult size group. Within about 15% either side of the curve is normal individual variation for a single weigh-in. Consistently outside that, in either direction, is worth raising with your vet.
How often should I weigh my puppy?
Weekly until four months, then monthly. Weigh at the same time of day, before a meal, on the same scales. For small breeds, weigh yourself holding the puppy and subtract, since bathroom scales are unreliable at low weights.
My puppy has stopped gaining weight. Should I worry?
A brief plateau is common, especially around teething when eating is uncomfortable. Several weeks with no gain, or any weight loss, needs a vet visit. Parasites are the most common treatable cause.
My large-breed puppy is above the curve. Is bigger better?
No, and in large and giant breeds it is actively harmful. Rapid growth is associated with hip and elbow dysplasia and osteochondrosis. The adult size is set genetically; feeding more only gets there faster and with more joint stress.
Do puppies grow in bursts?
Yes. Growth is not smooth week to week, which is exactly why a single measurement is a poor guide and a trend over several months is a good one.
When does the growth curve flatten?
Small breeds slow markedly after about eight months and finish by twelve. Large breeds keep gaining to around eighteen months, and giant breeds to twenty-four, with the last few months adding bulk rather than height.