Yorkie Weight Calculator: Puppy Weight Chart and Adult Size by Age

A 12-week Yorkie puppy is usually half its adult weight, so double the number on the scale. A puppy at 2 pounds should finish near 4 pounds, and the AKC breed standard says an adult must not exceed 7 pounds. This guide gives a Yorkie weight calculator, a puppy weight chart by week, and what weight means for food and vet costs.

Photo: Svenska Mässan from Sweden / Wikimedia Commons, CC BY-SA 4.0

Yorkie weight calculator: double the 12-week weight

The quickest Yorkie weight calculator is a multiplier. Take your puppy's weight at 12 or 13 weeks and multiply by 2. The multipliers below come from Hepper's Yorkie weight chart, updated June 24, 2026. It ends at 64 ounces, or 4 pounds, at 1 year.

Puppy age	Weight on chart	Share of adult weight	Multiply by
8 weeks	21.5 oz	34%	3.0
10 weeks	25 oz	39%	2.6
12-13 weeks	32 oz	50%	2.0
4 months	40 oz	62%	1.6
5 months	46 oz	72%	1.4
6 months	51 oz	80%	1.25
8 months	58 oz	91%	1.1
1 year	64 oz	100%	1.0

The "share" and "multiply by" columns are PetBudget arithmetic on Hepper's single curve. They have not been validated against a study of Yorkies.

Three worked examples show the method:

1. A 13-week puppy that weighs 2.5 pounds should reach about 5 pounds.
2. A 6-month puppy that weighs 3.5 pounds is at about 80% of adult size, or roughly 4.4 pounds.
3. An 8-week puppy that weighs 1 pound is below the chart, so weigh again in two weeks before predicting.

Hepper's chart tracks one adult weight. A Yorkie headed for 6 pounds will run above the line at every age. Trust the ratio more than the absolute number.

Why the linear puppy weight formula overshoots for Yorkies

Many online calculators divide puppy weight by age in weeks and multiply by 52. Our puppy weight calculator guide explains that formula, and it works for medium dogs. For a toy breed it runs high.

Apply it to the 2-pound puppy at 12 weeks and you get 8.7 pounds. That is more than double the 4 pounds Hepper's chart shows at 1 year, and above the AKC's 7-pound ceiling. Toy dogs gain most of their weight early, then slow down sharply.

The Elanco puppy growth chart agrees on the shape. It lists toy breeds under 12 pounds as adults, with growth that typically stops at 6 to 8 months. Medium breeds keep growing to about 1 year, and giant breeds to about 2.

Yorkie puppy weight chart by week and month

Here is the full Yorkie weight chart in ounces and pounds. Hepper reports the same values for males and females.

Age	Weight (oz)	Weight (lb)	Height
8 weeks	21.5	1.3	2-4 in
9 weeks	23	1.4	2-4 in
10 weeks	25	1.6	2-5 in
11 weeks	28	1.8	3-5 in
3 months	32	2.0	3-6 in
4 months	40	2.5	4-7 in
5 months	46	2.9	4-8 in
6 months	51	3.2	5-9 in
7 months	55	3.4	6-9 in
8 months	58	3.6	7-9 in
1 year	64	4.0	7-9 in

Weigh your puppy on a kitchen scale in ounces, at the same time of day, every week. Ask a vet about any puppy that loses weight or stalls for two weeks.

How much should an adult Yorkie weigh?

An adult Yorkie should weigh 3 to 7 pounds, and no more than 7 under the show standard. The AKC Yorkshire Terrier breed standard says: "Must not exceed seven pounds." Wikipedia's Yorkshire Terrier entry reports the same limit for the UK Kennel Club.

Source ranges differ a little:

Source	Adult weight
AKC breed standard	Must not exceed 7 lb
Hepper's weight chart	3-7 lb overall, 4 lb at 1 year on the chart
PetBudget breed data	4-7 lb, 7-8 in tall
Elanco toy class	Under 12 lb

Hepper adds that purebred Yorkies rarely exceed 7 pounds, while mixes can reach 15 pounds or more. If your dog is far above the range, ask the vet whether the cause is frame size, mixed parentage or body fat.

One pound matters more on a Yorkie

One pound of extra fat is 18% of a 5.5-pound Yorkie's body weight. The same pound is under 1% of a 142-pound Great Dane. Small dogs have almost no margin for weight gain.

The Association for Pet Obesity Prevention reports that 59% of U.S. dogs were overweight or obese in its 2022 prevalence survey. In its 2023 owner survey, only 17% of dog owners called their own dog overweight. Another 84% described the dog as ideal or healthy.

Check your Yorkie with your hands, not the scale alone:

1. Feel the ribs. You should find them under a thin layer of fat without pressing.
2. Look from above. A healthy dog narrows behind the ribs.
3. Look from the side. The belly should tuck up toward the back legs.
4. Count treats. A 10% treat cap on a 200-calorie day is only 20 calories, as our feeding guide explains.

How much does a Yorkie eat? Calories by weight

A neutered adult Yorkie needs 1.6 times its resting energy. The Merck Veterinary Manual energy table gives that factor. It uses 1.8 for intact adults and calls the result "only a starting point." Resting energy is 70 times body weight in kilograms to the 0.75 power.

Adult weight	Resting calories	Daily calories (1.6x)	Dry food a day	Food cost a year
3 lb	88	141	39 g	$57
4 lb	109	175	49 g	$71
5 lb	129	207	57 g	$84
6 lb	148	237	66 g	$96
7 lb	167	266	74 g	$108

The grams assume dry food at 3,600 calories per kilogram. The cost uses $3.99 a kilogram, the values behind PetBudget's model, with no treats added.

Your food's label sets the real portion. Our dog feeding guide shows how to convert calories to cups.

Teacup Yorkies and tiny puppies

Teacup is not a size. The AKC standard sets a 7-pound ceiling and no minimum, so breeders who sell "teacup" or "mini" puppies use their own cutoffs. Our Yorkshire Terrier price guide covers what those labels do to the price.

Smaller is not safer. Per Wikipedia's Yorkshire Terrier entry, low blood sugar is common in puppies aged about 5 to 16 weeks, often after fasting. Very tiny puppies are especially prone because they hold little muscle to store glucose. Signs include drowsiness, shakiness and pale gums, and severe or repeated episodes can cause seizures, coma or death. Treat these signs as an emergency and call a vet.

The same entry notes that tracheal collapse occurs in many toy breeds, especially very tiny Yorkies. It also says the breed tolerates anesthesia poorly. Dental disease is the cost to watch. Trupanion claims data in PetBudget's breed profile puts a dental claim at $400 to $600. Our teeth cleaning cost guide covers what a cleaning runs.

For scale, Wikipedia records the smallest Yorkie ever documented, a dog named Sylvia who died in 1945 at age two. She weighed 4 ounces. That is a 1945 record, not a target.

What a Yorkie's weight means for the budget

A small body keeps food cheap, but it does not make the dog cheap. In PetBudget's model a Yorkie costs $4,191 in year one and $1,885 a year afterward, or $157 a month. Over a 13-year life that comes to $26,811.

Here is where the yearly $1,885 goes:

Yearly cost line	Amount
Vet care	$561
Insurance	$599
Grooming	$507
Supplies and toys	$119
Food	$99

Food is 5% of the yearly bill. The model feeds 245 calories a day, or 68 grams, which is about 24.8 kilograms of food a year. Grooming alone costs five times as much as food.

Weight still moves the bill through the vet. Extra weight on a dog with a collapsing trachea or loose kneecaps makes both worse. See the Yorkshire Terrier breed page for the full cost breakdown, or put your own dog's weight into the PetBudget calculator.

When do Yorkies stop growing?

Most Yorkies reach adult size between 6 and 12 months. Hepper says many are mature by 6 to 8 months and all are adults at 12 months. Elanco puts toy breeds at 6 to 8 months.

After that, any steady gain is fat or coat weight, not growth. Weigh monthly through year two. If the number keeps climbing, trim the daily ration by about 10%. Recheck in 2 to 4 weeks, as our feeding guide recommends.