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The Puppy Weight Calculator helps you estimate your puppy's current weight and predicts its adult weight. If you have adopted a puppy and want to know its future size, this dog size calculator is the best tool for accurate predictions.
You can determine your puppy’s adult size using the formula:
Adult Weight = Puppy Weight ÷ Puppy Age in Weeks
Based on puppy weight at different intervals, dogs are categorized as follows:
| Toy dog | < 12 lb / < 5.4 kg |
| Small dog | 12 - 22 lb / 5.4 - 10 kg |
| Medium dog | 22 - 57 lb / 10 - 25.9 kg |
| Large dog | 57 - 99 lb / 25.9 - 44.9 kg |
| Giant dog | > 99 lb / > 44.9 kg |
Puppies typically take about a year to reach adult size, though growth rates vary. Below are estimated weight charts by breed size:
| Birth Weight | 2.5 oz | 3.5 oz | 4.5 oz | 5.5 oz | 6.5 oz |
| 1 week | 3.5 oz | 6 oz | 9 oz | 10 oz | 12 oz |
| 2 weeks | 5 oz | 7 oz | 12 oz | 14 oz | 18 oz |
| 4 weeks | 8 oz | 12 oz | 18 oz | 22 oz | 24 oz |
| 6 weeks | 10 oz | 16 oz | 24 oz | 29 oz | 34 oz |
| 8 weeks | 12 oz | 20 oz | 29 oz | 35 oz | 42 oz |
| 10 weeks | 14 oz | 23 oz | 33 oz | 40 oz | 47 oz |
| 12 weeks | 16 oz | 27 oz | 39 oz | 47 oz | 55 oz |
| 14 weeks | 18 oz | 31 oz | 45 oz | 52 oz | 62 oz |
| 16 weeks | 20 oz | 35 oz | 52 oz | 59 oz | 72 oz |
| 18 weeks | 22 oz | 38 oz | 54 oz | 67 oz | 78 oz |
| 20 weeks | 24 oz | 42 oz | 58 oz | 72 oz | 82 oz |
| 22 weeks | 26 oz | 44 oz | 62 oz | 76 oz | 86 oz |
| 24 weeks | 28 oz | 46 oz | 66 oz | 78 oz | 90 oz |
| Adult Weight | 1.75 lbs | 3.5 lbs | 5 lbs | 6 lbs | 7 lbs |
| 8 weeks | 2 lbs | 3 lbs | 4 lbs |
| 10 weeks | 2.5 lbs | 4 lbs | 5.5 lbs |
| 12 weeks | 3.5 lbs | 5 lbs | 6.5 lbs |
| 14 weeks | 4 lbs | 6 lbs | 7.5 lbs |
| 16 weeks | 4.5 lbs | 7 lbs | 9 lbs |
| 5 months | 6 lbs | 8.5 lbs | 12 lbs |
| 6 months | 7 lbs | 10 lbs | 14 lbs |
| 7 months | 8 lbs | 11.5 lbs | 16 lbs |
| 8 months | 9 lbs | 13.5 lbs | 18 lbs |
| 10 months | 11 lbs | 16.5 lbs | 22 lbs |
| 12 months | 13 lbs | 20 lbs | 27 lbs |
| 8 weeks | 5 lbs | 6 lbs | 8 lbs |
| 10 weeks | 6.5 lbs | 8 lbs | 10.5 lbs |
| 12 weeks | 8 lbs | 10 lbs | 12 lbs |
| 14 weeks | 9.5 lbs | 12 lbs | 15 lbs |
| 16 weeks | 11 lbs | 14 lbs | 17 lbs |
| 5 months | 14 lbs | 18 lbs | 23 lbs |
| 6 months | 17 lbs | 20 lbs | 27 lbs |
| 7 months | 19 lbs | 23 lbs | 31 lbs |
| 8 months | 22 lbs | 27 lbs | 36 lbs |
| 10 months | 27 lbs | 33 lbs | 43 lbs |
| 12 months | 33 lbs | 40 lbs | 53 lbs |
| 8 weeks | 11 lbs | 13 lbs | 15 lbs |
| 10 weeks | 14 lbs | 17 lbs | 19 lbs |
| 12 weeks | 17 lbs | 20 lbs | 23 lbs |
| 14 weeks | 20 lbs | 23 lbs | 27 lbs |
| 16 weeks | 23 lbs | 27 lbs | 29 lbs |
| 5 months | 31 lbs | 36 lbs | 31 lbs |
| 6 months | 36 lbs | 43 lbs | 42 lbs |
| 7 months | 42 lbs | 49 lbs | 57 lbs |
| 8 months | 48 lbs | 57 lbs | 66 lbs |
| 10 months | 60 lbs | 64 lbs | 82 lbs |
| 12 months | 72 lbs | 85 lbs | 98 lbs |
| 18 months | 105 lbs | 125 lbs | 145 lbs |
Follow these steps to estimate your puppy’s adult weight:
Output:
How Much Should A Three-Month-Old Puppy Weigh? A 3-month-old male puppy should weigh 20–30 lbs. Female puppies typically weigh 20–25 lbs. If unknown, use a puppy weight calculator to predict it.
Is My Puppy Underweight? Your puppy may be underweight if its ribs, spine, and bones are prominent and the waist is very narrow. Look for muscle loss around shoulders and legs.
From Wikipedia: Puppy nutrition, Energy, Synopsis, Dog breed, Genetic evidence, Breeds
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