Growth Chart this is how we calculate adult weight on our pups.

Convert your Yorkie puppy weight to ounces ( 16oz equals 1 pound )

NOTE: an example; 10 week old puppy current weighs 2.2 lbs
conversion 16 X 2 + 2 = 34 ounces
next find puppy's current age to the left then follow along until you find 34;
nextfollow to the bottom of that column estimated adult weight is 5lbs.
when in doubt use 3 x weight at 8 weeks or 2 x weight at 12 weeks

Birth 2.5 oz. 2.75 oz. 3 oz. 3.5 oz. 4 oz. 4.25 oz. 4.5 oz. 5 oz. 5.5 oz.
1 week 4.50 5 5.5 6 7 7.5 8 9 9.5
2 weeks 6 6.5 7 8.5 10 11 12 13 13.5
3 weeks 7 8 8.5 10.5 13 14 15 16 17.5
4 weeks 8 9.5 10 12 14.5 16 18 20 21
5 weeks 9 11 11.5 13.5 16 18 20 22 24
6 weeks 10 12.5 13 15 17.5 20 23 24 27
7 weeks 11 12 14.5 17 19 22 25 27 30
8 weeks 12 13.5 16 19 21.5 24 27 29 32
9 weeks 13 15 18 22 23 26 30 33 35
10 weeks 14 16 20 24 25 28 33 36 38
11 weeks 15 17 21 26 28 31 36 39 42
12 weeks 16 18 22 28 32 35 40 43 45
13 weeks 17 20 24 30 34 36 42 45 48
14 weeks 18 22 26 32 36 39 44 47 51
15 weeks 19 23 28 34 38 42 46 51 55
16 weeks 20 25 30 36 40 44 49 54 59
17 weeks 21 26 31 38 42 46 51 57 62
18 weeks 22 28 33 39 44 48 54 60 65
19 weeks 23 29 34 40 45 50 56 62 67
20 weeks 24 30 35 41 46 52 58 64 70
21 weeks 25 31 36 42 48 54 60 66 72
22 weeks 25 32 37 43 48 56 62 68 74
23 weeks 26 33 38 44 50 57 64 70 76
24 weeks 26 33 39 45 51 58 65 71 78
25 weeks 27 34 40 46 52 59 66 72 79
26 weeks 27 34 40 47 53 60 67 73 80
18 Month 2 lbs 2.5 lbs 3 lbs 3.5 lbs 4 lbs 4.5 lbs 5 lbs 5.5 lbs 6 lbs