The giant-breed curve
Great Danes are a giant breed: the AKC standard gives 140 to 175 lb and 30 to 32 inches at the shoulder for males, 110 to 140 lb and 28 to 30 inches for females. Giant puppies begin furthest from their adult size. At 8 weeks a giant-breed pup has about 12% of the weight it will reach, at 12 weeks about 23% and at 16 weeks about 34%, where a toy pup is already at half.
So the example here, 32 lb at three months, points to about 141 lb, anywhere from 111 to 190 lb. That span narrows with every weigh-in over the following months.
Why a Dane’s estimate is rougher
Giants are thin on the ground in the data behind this calculator: just two breeds, some five thousand dogs, where the toy, small and large groups each have well over a hundred thousand. The study’s own published charts stop at 40 kg (88 lb), about half a grown Dane. Read the estimate as a rough guide and compare it with the breed standard shown in the tool.
In the chart below, the 157.5 lb male is about 144 lb when he turns one, the 125 lb female about 114. If you have questions about how quickly your Great Dane is growing or what to feed it, ask your vet.
Great Dane puppy weight chart
| Age | Maleadult ≈ 158 lb | Femaleadult ≈ 125 lb | Share of adult weight |
|---|---|---|---|
| 8 weeks | 19.2 lb · 8.7 kg | 15.3 lb · 6.9 kg | 12% |
| 10 weeks | 27 lb · 12.2 kg | 21 lb · 9.7 kg | 17% |
| 12 weeks | 36 lb · 16.2 kg | 28 lb · 12.8 kg | 23% |
| 16 weeks | 54 lb · 25 kg | 43 lb · 19.5 kg | 34% |
| 5 months | 80 lb · 36 kg | 64 lb · 29 kg | 51% |
| 6 months | 98 lb · 44 kg | 78 lb · 35 kg | 62% |
| 7 months | 112 lb · 51 kg | 89 lb · 40 kg | 71% |
| 8 months | 124 lb · 56 kg | 98 lb · 44 kg | 78% |
| 9 months | 131 lb · 59 kg | 104 lb · 47 kg | 83% |
| 10 months | 137 lb · 62 kg | 109 lb · 49 kg | 87% |
| 1 year | 144 lb · 65 kg | 114 lb · 52 kg | 91% |
| 15 months | 148 lb · 67 kg | 117 lb · 53 kg | 94% |
| 18 months | 151 lb · 68 kg | 120 lb · 54 kg | 96% |
| 2 years | 156 lb · 71 kg | 123 lb · 56 kg | 99% |
| Adult (2–3 years) | 158 lb · 71 kg | 125 lb · 57 kg | 100% |